VE Analyze Live
Contents
1. Introduction 1 System Requirements so 1 Initial Setup 2 Creating a New Project a 2 The TunerStudio User Interface____________4 Using Tune Files 5 Associating a Tune File With a Project 5 Setting Engine Constants 6 Calibrating Engine Sensors 6 Coolant Temperature Sensor 6 Manifold Air Temperature Sensor 7 Throttle Position Sensor I MAP Sensor 8 AFR Table EGO Sensor 8 Trigger Wheel Settings 9 Fuel Constants 10 Required Fuel 10 Ignition and VE Tables 11 Ignition Settings 11 Noise Filtering 11 VE and Ignition Table Manipulation 12 Table Controls 13 Startup and Idle Settings 14 Cranking Settings 14 Priming and Cranking Pulse 14 Afterstart Enrichment 15 Idle Air Control 15 Accel Enrich 16 Extended and Advanced Tabs 16 Datalogging and VE Analyze Live 17 Datalogging 17 VE Analyze Live 17 Heat Maps 18 Further Resources pd NO Introduction to TunerStudio MS Welcome to TunerStudio MS the most popular and capable MegaSquirt tuning solution available today TunerStudio is the most widely used tuning software for the MegaSquirt family of controllers and is available either as a free download with essen tial features or for purchase with expanded features and capabilities This guide will cover the paid version of the software and will familiarize new users with the basic functions of the software program A basic understanding2. Cranking Pulsewidth Coolant F Cranking PV Ml E fso ps Boo po Bs po 677 ps bso fea hiza fi5o hass fa fess pr fis21 lipo 5 Figure 6 2 Priming Pulse Figure 6 3 Cranking Pulse 14 Afterstart Enrichment Afterstart enrichment is the process of providing extra fuel to the motor in the mo ments after it starts This enrichment process is essential for keeping a motor run ning on a cold morning The controls for afterstart enrichment can be accessed from the Startup Idle tab on the Access Bar Choosing the ASE Percentage option will open the Afterstart Enrichment Percentage dialog box Here you can control how much additional fuel is provided to the motor in the moments after starting based on coolant tempera ture Figure 6 4 illustrates the ASE Percentage window eo Cr 80 0 Like many other TunerStudio variables the percentage of ASE is controlled by clicking and TTT TLS FI ES Atersar za 139 8 fis21 5 220 0 fogo Burn Figure 6 4 ASE Adjustment low line On the visual graph the vertical axis is percent enrichment and the horizontal axis is coolant temperature Figure 6 4 illustrates a normal ASE curve 5 0 3 3 fso 12 64 6 N TTT idle Air Control Though an optional item in any MegaSquirt installation an Idle Air Control Valve or IAC helps to give
3. Figure 5 2 Noise Filter Config 11 Main Table of Contents Introduction Initial Setup The TunerStudio User Interface Using Tune Files Setting Engine Constants Ignition and VE ables Startup and Idle Settings Accel Enrich Datalogging and VE Analyze Live Further Resources there are four options that can be changed First is the choice to enable or disable noise filtering and second is the option to reject the tach pulse under the circum stances defined by the final two fields Time ms and Percentage Note Fig ure 5 2 where the Time field is set to 1 0 and the Percentage field is set to 10 This means that if the tach signal increases or decreases by more than 10 percent within in 1 millisecond the ECU will reject the tach signal until it stabilizes The same options are present under the Second gt Noise filter curve ary Tach Cam heading as exist under the Pri Eu Noise filter curve mary Tach Crank heading with the addition of a Tach Interrupt Masking option Choosing Yes in this menu will enable the ECU to esti mate where the cam is in it s rotation in the event of a missing trigger pulse Figure 5 3 shows a typical noise filtering curve which governs the sensitivity of the noise filter ing feature As the graph illustrates at lower RPMs the noise filter is more sensitive than it is at higher RPMs If you choose to manipulate the noise filtering curve you can click and drag
4. TunerStudio MS New User Guide Preface This New User Guide for TunerStudio MS is designed to help the DIY mechanic who recently completed a MegaSquirt conversion gain basic skills and improve their interaction with the TunerStudio software This guide does not address tuning procedure tuning theory or profess attempt or advise in any way the act of tuning a vehicle engine or motor That information is extensively documented by numerous sources including the MS EFI forum MSEx tra com and innumerable other sources both online and in print This guide was developed in cooperation with Phil Tobin author of the TunerStudio software to make the transition from the carburreted world to modern electronic fuel injection easier The author of this guide can not and will not take any responsibility for damages caused to persons or property as a result of techniques described in this manual DO NOT attempt to use the software while in a moving car DO NOT tune your vehicle on public roads DO stop the car to make adjustments to your tune DO schedule time on a dyno drag strip or private road or track for tuning This guide is provided free of charge If asked to pay for this publication please con tact EFI Analytics directly Table of Contents
5. a motor a smooth stable idle The pe quai IAC works by opening an closing a variable valve Sm Fastidle Temperature ZF in a tube placed between the front and rear of Sea ae p Size ms the throttle plate Essentially the IAC allows a Initial Time Step Size ms controlled amount of air to bypass the throttle plate at idle in order to speed up or slow down Rin idle Settings for the IAC motor of your choos gt a 2a ing are located in the Idle Control option of the ime Based After Stat Startup Idle tab on the Access Bar Figure 6 5 Cold Temperature F shows the Idle Control window RE nia Cold Taper Time sec Similar to some of the sensor calibration win dows the drop down list beside Algorithm contains presets for popular IAC motors If your Figure 6 5 Idle Control Settings IAC is not contained in the list you will have to have to enter values for the motor manually in the remaining fields After changes have been finalized choose to Burn the settings to the ECU and Close the window 15 Accel Enrich In order to keep your motor properly and to keep AFRs in check it is important to utilize the Accel Enrich function build into TunerStudio This feature will automati cally sense when the throttle plate snaps open and a large volume of air rushes into the motor More air requires more fuel to maintain a proper air and fuel mixture Accel Enrichment Wizard Ica Me Creating proper Accel Enric
6. any of the four blue points along the yellow line Once changes have been finalized be sure to click Burn and then Close Figure 5 3 Noise Filter Curve VE and Ignition Table Manipulation The VE and Ignition tables are where the majority of your tuning will take place and thus it is essential to understand and navigate well The VE table as mentioned before contains values that relate to volumetric efficiency whereas the ignition table shows degrees of ignition advance Decreasing these values injects less fuel at a given point and makes the engine run leaner in the VE table and pulls timing on the Igni tion Table Increasing the value injects more fuel and makes the motor run richer in the VE table or adds ignition timing on the Ignition Table The VE Table is accessed from the Basic Settings option on the Access Bar The Fuel VE Table 1 button will open the VE table for editing Figure 5 4 illustrates a VE table ready to edit To ac cess the ignition table instead Mas choose Ignition Table 1 The AN numbers along the vertical axis E O semanal io gt relate to fuel load on the VE table and Ignition Load on the ignition table The values along the horizontal axis are engine MM e eae ee ee RPM speeds on both tables SS ES A 3D Vie IEEE 101 104 106 107 108 113 19 a 1 Burn CI Remember as we discussed Figure 5 4 VE Table previo
7. be powered on and con nected to TunerStudio Coolant Temperature Sensor In order to calibrate the CTS choose Calibrate Calibrate Thermistor Tables Thermistor Tables from the Tools drops down OA in the Menu Bar This will open a dialog box Thermistor Mesurements j i n it Bi Common Sensor valueslem ri with several options in it Figure 4 1 poi Paso Vales leas paoo Fahrenheit e Celsius 1 Choose Coolant Temperature Sensor from Temperature C Resistance Ohms the drop down menu called Sensor Table FE CN 99 0 177 0 Select settings click Write to Controller Write to Controller 2 The second drop down menu gives a choice of several popular temperature sensors If the temperature sensor used in your build is in this list simply select it from the list click Write to Controller and then Close Fig 4 1 CTS Calibration 3 If your sensor is not present in the list of pre configured sensors you must enter resistance values manually This information can be found either from the manufacturer of the temperature sender or by an online search for the resistance values MSEFI com contains resistance values for a wide range of sensors 4 Once the temperature values have been found and put in the table click Write to Controller and then Close Manifold Air Temperature Sensor The MAT sensor relays the temperature entering the motor to MegaSquirt Mega Squirt uses t
8. dual 4 bar sen sor with one sensor detecting engine conditions and the other used for barometric corrections The _ sensor Calibration latter is extremely useful for those who drive their comen Sensors MPXH6400 x IMAP Sensor F1 for common values vehicles in both low elevations and mountainous TT a E areas Begin calibrating the MAP sensor by choos value at 5 0 votet mes E ing Sensor Calibration from the Tools option in Barometer Sensor usually identical to MAP the Menu Bar The dialog box that opens is shown Cee E E f Value at 5 0 volts KF a 416 5 E 11 Figur e 4 4 Barometric Correction At total vacuum hazo E 1 From the Common Sensors drop down menu EBAR choose the sensor that you installed in your Mega Squirt ECU or that you specified when ordering Ee your ECU Figure 4 4 MAP Calibration GM 3 BAR is the most common sensor MPX 4250 is the upgraded 4 bar sensor MPXH 6400 is the dual 4 bar sensor 2 When you have selected the appropriate sensor for your application click Burn and then Close AFR Table Calibration Perhaps the single most important sensor for the automotive tuner is the Oxygen O2 or Air Fuel Ratio sensor There are two distinct types of O2 sensors Narrow band and Wideband Narrowband sensors detect how much oxygen is in the exhaust gases and if the engine is running lean and leaving lots of oxygen in the exhaust the sensor provides a lean signal to the EC
9. of the Tuner Studio software is a crucial aspect of a successful tuning process System Requirements TunerStudio is designed to be a lightweight application and will run on many computers with minimal resources without issue It is suggested that a cheap used laptop be purchased for tuning purposes to prevent damage to a more expensive machine in a garage and vehicular environment Below you will find a list of suggested system requirements for the laptop running TunerStudio MS The software can be run on almost any computer but computers with better video card capabilities will be able to render gauges quicker and more smoothly Windows 98 or above Apple OSX Leopard or above Linux Most distros Java Runtime Environment 1 7 1GHZ Processor e512mb RAM DB9 Serial Port or USB to Serial Port Adapter TunerStudio has been successfully installed and run on computers with processors as slow as 366MHZ and with a few adjustments can be made to run smoothly on computers that do not meet the suggested system requirements TunerStudio can be optimized for slower machines in the following ways Dashboard Anti Aliasing Right Click on the dashboard and choose the option for Antialiasing This being on has little to no impact with good video drivers however on older machines antialiasing being on can double CPU usage Dashboard selection The default dash with the 8 gauges has no gauges overlap ping whereas other layouts d
10. T your ECU with the Mapdaddy sensor or MaPBaroort Derai O T if you built the ECU yourself with the dual E MAP sensor option you should choose E the MAP Baro ON setting More settings activated dr regarding this item will be discussed in the mm meme S Calibrati tion A a a Figure 1 2 Configuration Settings The next option is Additional Fuel This setting is used to set up control of an ad ditional fuel in this case Nitrous Oxide It is highly unlikely that you will need to configure this setting at this point so leave it set to the default N2O OFF setting If you decide to add nitrous at a later point it can be reconfigured X Tau Visible is the last option in this dialog box X Tau refers to the quantity of fuel X that clings to the intake tract walls for a given time Tau after a fuel injector pulse Leave this option Activated TunerStudio will automatically calculate X tau and actively make corrections if needed At this point we can proceed by clicking Next A third dialog box will open prompt ing you to verify your projects communica tions settings They should be correct as a result of clicking Detect on the first Create New Project dialog box but they can be checked again by powering the ECU and clicking Test Port New TunerStudio Project The final option in the project creation process is choosing a layout for gauges on TunerStudios Dashboard Figure 1 3 Default Dashboard 0 There are several opti
11. U a voltage of 100 200mv If the engine is running rich and has very little oxygen in the exhaust the sensor will provide a rich signal to the ECU a voltage of 650 800mv The Wideband style of sensor is much more precise and will provide an actual read ing of exhaust gas oxygen content to the ECU A Wideband sensor operates on a reading from Ov 5v with Ov being full lean and 5v being full rich These sensors typically have a gauge that is mounted in the passenger compartment which will show a numerical value of the air to fuel ratio that the motor is running at For a gasoline fuel engine a reading of 14 7 is considered stoichemetric or the proper bal ance between parts air to parts fuel An AFR of 14 7 means that for every 14 7 parts air that the motor is using it is using one equal part fuel Any numerical value below 14 7 is rich and any numerical reading above 14 7 is lean Different fuels ethanol diesel LPG etc have different stoichemetric ratios The importance of a Wideband Oxygen Sensor is mainly in tuning It enables the tuner to keep a much closer eye on the motor s operating condition and helps pre vent catastrophic failures such as dropped and burned valves melted pistons over heated turbos inefficient combustion and poor fuel consumption Note If you chose your oxygen sensor when you set up the project with the EGO 02 Sensor parameters the following steps are not necessary In order to calibrate yo
12. ab on the Access Bar een By navigating to Trigger Wheel Settings under Basic Setup Figure 4 6 you can modify the set tings for whatever trigger system you decide to use Extensive user research is recommended in this section When the appropriate settings have been made choose Burn to send the settings to the ECU Figure 4 6 Trigger Wheel Settings Fuel Constants MegaSquirt uses a number of fuel related constants to accurately inject fuel into the motor in the correct quantities at the correct time Required Fuel The Required Fuel or Req Fuel setting deter Standard injection mines how long the fuel injector is open and Calcutate Required Fuel delivering fuel This pulse is measured in milli seconds In order to calculate Req Fuel simply use the built in calculator accessible from the Control Algorithm SpeedDensity w Engine Constants option found in the Basic Squirts Per Engine Cycle Setup menu of the Access Bar The dialog box Injector Staging Simultaneous that appears is shown in Figure 4 7 Engine Stroke Number of Cylinders Clicking the Required Fuel option will open PRECES RR the Required Fuel Calculator which asks for a Reno pingos few parameters about your particular motor The calculator considers engine displacement cylinder number fuel injector flow rate and SEUS TESTE your target AFR to calculate the Required Pei ISSA In Fuel value The c
13. alculator window is shown in Figure 4 8 Once TunerStudio has performed Engine Type Even fire the necessary calculation choose Okay and Engine Displacement 350 as gt Number of Cylinders la OCD ecc the value will automatically be placed in the cti i required fuel field See E ibhr O ccimin ok Cancel Figure 4 8 Reg Fuel Calculator The remaining fields in the Engine Constants dialog box should be filled out according to the parameters of your motor Once the window has been completed choose Burn and Close Engine Constants Conclusion The savvy user will notice a second option below the Engine Constants button titled More Engine Constants This option deals with setting up fueling constants for a second VE table a feature not needed by most users and beyond the scope of the beginning user Ifyou desire to set up dual VE tables it is highly recommended that you research the MS EFI forum for pertinent information A feature heavily discussed in older versions of TunerStudio and MegaSquirt is that of Pulse Width Modulation or PWM Early versions of MegaSquirt required the user to carefully manipulate PWM during the tuning process but newer versions of TunerStudio perform these calculations automatically If your version of MegaSquirt requires PWM changes they can be accessed from the Injector Characteristics op tion in the Access Bar 10 Ignition and VE Tables This section will discuss how to n
14. avigate through the various ignition setup win dows and how to manipulate ignition and VE tables Editing these tables is how you will tune your EMS and knowing how to smoothly navigate these tables under standing keyboard shortcuts is essential to the tuning experience Ignition Settings In order for the MegaSquirt ECU to properly control your vehicles ignition it is necessary to set up the ignition parameters much as we did in the previous section with engine sensors and con stants The Tach Input Ignition Settings dialog box is accessed from the Basic Settings option on the Access Bar The window that appears is illus trated in Figure 5 1 Like many other aspects of the MegaSquirt sys tem ignition setup is very open ended and varies from installation to installation For this reason a configuration walkthrough will not be covered in the manual as ignition setup is already extensively Trigger Angle Offset deg Angle between main and return deg Oddfire small angle GM HEI DIS options 420A NGC alternate cam Use cam signal if available Oddfire phasing Skip Pulses z Falling Edge v Going Low Normal x Number of coils Wasted spark w Spark A output pin D14 preferred ps w Figure 5 1 Ignition Settings documented in the MegaManual and at MSExtra com The first drop down menu called Spark Mode contains a multitude of presets for various popular igniti
15. d 71 Average Cell Weight 2 97 Average Cell Change 1 7 Max Cell Change 6 0 Active Filter Figure 8 2 VE Analyze Live minimal attention on the part of the operator The basic parts of the screen are as follows Update Controller Checkbox When checked VE Analyze will update the control ler every 15 seconds with the recommended values It will act as if you are pressing the Send button every 10 seconds This will allow VE Analyze dial in as you drive If you want VE Analyze to generate the recommedations but not send them to the controller until you have been able to review them leave this unchecked Uncheck is the is recommended for first use es pecially at heavy throttle conditions so you can verify that the recommended values make sense Send Button When clicked the recommended table will be written to the controller RAM and it will begin using the recommended table Burn Button This signals the Controller to persist the values in RAM to Flash so they are stored for use after the controller is power cycled When values are written to RAM but not flash the controller will use them however once the controller is power cycled they are lost and the values will be loaded from flash memory This button should be clicked when you are finished and want to keep you values Start Stop Auto Tune Button Activates and deactivates VE Analyze Live Heat Maps Heat maps are a viual representation of how much data VE Analyze Live has bee
16. h settings will be different for each and every mo tor TunerStudio includes an Accel Enrich Wizard that will help you calculate your di necessary Accel Enrich values This wizard one osuonv anta pressure ec emermentstaen Pecen FSOn n can be accessed by selecting the Accelera tion Wizard option from the Accel Enrich tab on the Access Bar The Accel Wizard 1S MAP dot Threshold kPa s al TPSdot Threshold s Accel Time s 7 Decel Fuel Amount shown in figure ie 1 E Accel Taper Time s y Sl Cold Accel Enrichment ms End Pulsewiath ms bs EH Cold Accel Multiplier Figure 7 1 Accel Enrich Wizard By double clicking on each graph you can select either a MAP based or TPS based Accel Enrich method TPS based is recommended for most applications as the TPS sensor reading directly relates to the throttle plate the event that triggers the need for acceleration enrichment in the first place With the car running this wizard will automatically calculate accel enrichment values and will finalize them when you choose to Burn changes and Close the window The values generated by the accel enrichment wizard will automatically be loaded into the Accel Enrich Settings dialog box which may be viewed by clicking Accel Enrich Settings from the Accel Enrich tab on the Access Bar Extended and Advanced Tabs The Access Bar con
17. his data as part of the fueling calculation in order to discover how much fuel to inject into the engine and how often This sensor is typically placed in the intake tract but in some turbocharged applications it is placed in ambient air to provide better fueling compensation from the ECU Whereas coolant temperature sensors are often varied with each motor or MegaSquirt installa tion the most common type of MAT sensor is the GM style Figure 4 2 found in late model Chevrolets Isuzus Buicks Cadillacs Saturns and many other GM makes To calibrate this sensor choose Calibrate Thermistor Tables from the Tools drops down in the Menu Bar In the drop down menu beside Sensor Table choose the Air Temperature Sensor option Figure 4 2 GMIAT 1 Ifyou used a GM Style MAT sensor choose GM from the drop down menu beside Common Sensor Values 2 If a different MAT sensor than GM was used in your MegaSquirt installation choose the appropriate sensor from the drop down list If the sensor does not exist in the list resistance values must be entered manually in the same way you entered values for your Coolant Temperature Sensor in the previous section 3 Once the appropriate values for your sensor have been chosen or entered click Write to Controller then choose Close Throttle Position Sensor The throttle position sensor is located on one end of the throttle plate shaft and tells the MegaSquirt ECU what percentage the throt
18. ind an MSQ that has been developed for a motor similar to yours For example if you were tuning a Chevrolet 350 V8 starting out with an MSQ for a 2 3 liter Volvo 4 cylinder would not be a good match The tune file that you choose to associate will be the basis for all future tuning that will occur with the ECU The most important aspects of the donor tune file are the VE table and Ignition table Other fueling settings and ignition settings are easily changed but building a good workable VE table or Ignition table from scratch is very difficult for even the most advanced MegaSquirt tuners Once you have found a suitable MSQ simply download the file and save it to your desktop Associating a Tune File With a Project With TunerStudio open and the ECU powered on and connected to the laptop choose Open Tune from the File button on the Menu Bar Figure 3 1 and locate the MSQ that you downloaded on the hard disk of your r o computer Ele Options Data Logg Once you choose to open the MSQ it will automatically be associated with the project that you chose Any changes made to the MSQ by tuning will automatically be saved each time TunerStudio is closed Alternatively you Figure 3 1 Open Tune can also choose Save Tune option from the File menu Ifyou choose to open a tune file without an ECU connected to TunerStudio the software will prompt you to choose between two options You can either choose Yes to use an existing project
19. m on the road or during a tuning session becomes extremely evi dent when the datalog is viewed A sample datalog is shown in Figure 8 1 TunerStudio records engine data as a graph and automaticaly saves it in a format accessible to the freeware program Mega LogViewer another product from EFI Analytics MegaLogViewer enables the tuner to simultaneously view the datalog and tune file making on the fly adjustments as needed to the tune file Min 2071 0 Graph by MegaLogViewer 3 05 httpvuwww efianalytics com MegaLogViewer Figure 8 1 Sample Datalog Graph VE Analyze Live A lifeboat for floundering new automotive tuners VE Analyze Live is a feature built in to TunerStudio that helps the EMS autotune itself to an extnet VE Analyze live considers every value that a professional tuner does only much faster and much more efficiently VE Analyze Live works by automatically manipulating VE values to reach a target AFR as set in the AFR Table 1 in the Basic Setup tab of the Access Bar VE Analyze Live mode is entered by clikcing the VE Analyze Live tab which ap pears below the Startup Idle button on the Access Bar Figure 8 2 shows what the VE Analyze Live screen looks like There are only a few parts to the VE Analyze Live screen and the module itself 17 Fuel VE Table 1 Control Panel E Update conte VeAnalyze Stats Total Records 522 Filtered Records 55 Used Records 467 Total Table Cells 144 Cells Altere
20. milar to the menu bar present in most programs the TunerStudio menu bar contains options that influence the operation of the software program Software preferences project setup datalogging sensor configuration and more are accessed through the Menu Bar The Access Bar Ihe Access Bar is where you will find most of the tuning tools that you will need The VE table Ignition table AFR table Startup and Idle settings Knock Sensor set tings and many many more features are located here The Dashboard Ihe Dashboard is where all of the engine gauges are located There are eight spots for gauges in the default layout and each gauge can be changed by right clicking on the gauge face and choosing a different one from the drop down list Notification Area This small area contains notifications of what functions the ECU is currently per forming Cranking Warm Up Enrichment Accel Enrichment etc Using Tune Files Once you have set up the project for the ECU you will be tuning you must associate a Tune File or MSQ with the project to tell the ECU basic parameters that it will use in its operation These parameters include numerous engine constants and variables tables for fuel injection and ignition and many more items To start you must find a tune file that matches your engine setup A good source for finding MSQs is the MS EFI forum You need not concern yourself with finding an exact match for your setup but you need to f
21. n able to gather on a particular cell Cells in the heat map start off red and gradu ally turn green as more and more data is gathered It is imporant to note that the only way VE Analyze Live will be able to gather data on cells is to actually drive the vehicle around with the VE Analyze Live function enabled As the vechicle is driven the module will be allowed to work and make modifications to the VE Table and at tempt to hit the AFR targets set in AFR Table 1 18 The heat maps are visible on the right side pane of the VE Analyze Module and are illustrated in Figure 8 3 Cell Weighting Visually displays how much data has been contributed to the recommended value This allows you at a glance to see what sections of the table you have cov ered during your VE Analyze session and what sections you have not or needs more coverage Ideally you want to turn as much of this Heat Map green as possible Holding the mouse over and specific block will bring up a tooltip that indicates what X amp Y co ordinate the block represents Figure 8 3 Heat Maps Cell Change Visually displays how much the recommended values changed from the starting value Displayed dark blue to dark red richer to leaner Hold ing the mouse over and specific block will bring up a tooltip that indicates what X amp Y coordinate the block represents Further Resources MS EFI forum MSExtra com DIY Autotune For questions comments suggestions or m
22. o overlap gauges On slower computers keep the default dashboard Modal Dialogs Under the Menu Options gt Performance gt Modal Dialogs this options will stop animating the dashboard gauges while any dialogs are open so your CPU can focus on the dialog at hand Any data logging continues Initial Setup After successfully installing TunerStudio MS on your computer the first step is to set up the program to communicate with your ECU TunerStudio uses a feature called Project Setup to do this Please verify that your MegaSquirt ECU is properly wired and turns on when the vehicle is powered on If the ECU is wired correctly proceed with the following steps Creating a New Project Attach one end of the DB9 serial cable to the ECU and the other to the tuning com puter with TunerStudio installed 1 Open TunerStudio If this is the first time TunerStudio has been run the Create New Project dialog box Figure 1 1 will appear no If it does not nn go to File gt Project gt New Project E New oe rr 2 Create a name for the project then turn ea E the key of the vehicle on to power on the mea Cid MegaSquirt ECU O EEE Browse ECU Definition 3 Click the Detect option beside the ECU le Definition heading Project Description 4 Once TunerStudio has detected the ap propriate ECU configuration turn the key off 5 Enter a brief project description Figure 1 1 New Project Dialog Box Once the above s
23. odifications to this guide please contact Jared Gant jjgantl catamount wcu edu Completed as partial fufillment for ENGL 305 Technical Writing Spring 2012 19
24. on systems The remaining fields can be manipulated for a custom ignition setup if the choice in the Spark Mode box warrants it Noise Filtering A common problem with automotive electronics is See the web help for more information about noise filtering the presence of EMI or Electromagnetic Interfer ence This term is known colloquially as Noise TunerStudio integrates a noise filtering function to help guard the tach trigger against excessive noise Calibration of this function involves two windows shown in Figures 5 2 and 5 3 Figure 5 2 shows the Noise Filtering Configuration accessed from Ba sic Setup on the Access Bar Figure 5 3 shows the Noise Filter Curve which is also accessed from the Basic Setup pulldown on the Access Bar In the Noise Filtering Configuration window you may choose to turn on Primary Tach Crank noise filtering Secondary Tach Cam noise filter ing or both Under the Primary Tach heading Noise filtering rNoise filtering IMPRIMARY TACH Noise Filter Enabled Use noise filter curve to tune Tach period rejection Tach interrupt masking f Time ms Percentage Polarity checking Noise Filter Enabled Off Noise Filter Time Period uSec Tach period rejection Tach interrupt masking f Time ms Percentage Polarity checking Note a power cycle is required after enabling disabling the noise filters
25. ons available with varying levels of functionality but for the purposes of this manual it is advised that you retain the Default dashboard layout shown in Figure 1 3 The dashboard gauge layout is easily changed in the future if you prefer If you purchased TunerStudio it is possible to create totally custom gauge clusters and dashboards The TunerStudio User Interface In order to make future tuning easier it is helpful to become acquainted with the basic layout of TunerStudio There are four basic areas on the screen the Menu Bar Access Bar Dashboard and Notification Area Figure 2 1 E Menu Bar File Options Data Logging Communications Tools H i x Basic setup 29 Startup idie df Accel Enrich A Extended Advanced ACCESS BAR i Tuning Gauge Cluster Diagnostics VE Analyze Live A 3 1000 5 O RPM Engine Speed 7 A 7 20 30 1 gt 5 3 degrees on Advance 10 6 7 8 e a s 12 44 10 16 0 000 mSec 187 Pulse Width 1 20 24 1 60 80 3 Mi 100 120 40 20 14 C O 0 20 140 30 40 20 a ME 10 La 0 30 8 nifold I 50 3 C 90 Air Temp 707 0 DASHBOARD NOTIFICATION AREA MAP Decel J WUEOFA Y TASEOF E RE PESO STS E i Main Dashboard 5 E MAP Accel Enrich TPS Decel Figure 2 1 TunerStudio User Interface The Menu Bar Si
26. or down of selected cells For ex ample inputting a value of 1 2 with this button would increase the values by 20 A value of 2 would reduce the selected cells value by 80 Interpolate Select a range of cells and click this button to automatically interpo late selected cells within that range The VE table may also be viewed in 3D by select ing the 3D View option in the upper right corner of the table Figure 5 5 shows the VE table in 3D mode In this mode the mouse cursor may be placed on any intersection of two lines and dragged up and down to manipulate VE values Figure 5 5 3D View Mode 13 Startup and Idle Settings Tuning startup and idle settings is perhaps the most difficult phase of tuning for an inexperienced tuner for the simple reason that there is a very short time to manipu late the values and in order to test changes the motor must completely cool All of the tools to tune cranking and startup parameters are listed under the Start up Idle tab on the Access Bar Cranking Settings MegaSquirt needs to know a few variables that re late to engine cranking such as cranking speed in ee rng RPM a flood clear percentage and when to inject cranking RPM m E fuel during cranking either every rotation of the Flood deartrs poo E motor or every other rotation These settings Ac b fi d th C ki S tti ti Cranking fuel pulse rate can DE found in e ran Ings Ings Op lon in Engines
27. tains two more tabs that apply only to much more advanced us ers of TunerStudio The Extended tab houses options such as Flex Fuel Staged Injec tion Launch Control and Nitrous subjects that are outside the range of a beginners guide to TunerStudio These advanced features require an intimate knowledge of automotive tuning practices and a familiarity not only with TunerStudio but with MegaSquirt programming and development as well Any manipulation of values in these sections by an inexperienced individual should be accompanied by thorough online research to diminish the possibility of making a mistake and damaging your motor or incurring personal injury MSExtra com and the MS EFI forum both contain excellent resources for experi menting with these more advanced features 16 Datalogging and VE Analyze Live Main Table of Contents Introduction Initial Setup The TunerStudio User Interface Using Tune Files Setting Engine Constants Ignition and VE ables Startup and Idle Settings Accel Enrich Datalogging and VE Analyze Live Further Resources Datalogging Likely the simplest yet most useful feature of TunerStudio is the ability to Datalog Datalogging in simple terms is recording every engine event that the ECU sees during an operational session in a way that it can be played back and analysed later Datalogs play a crucial role in perfecting your MegaSquirt installation Often times a recurring proble
28. teps have been completed we can proceed with configuring the project Click Next in the Create New Project dialog box The next screen that ap pears will be a series of Configuration Settings Figure 1 2 settings that will influ ence how the MegaSquirt ECU interprets the data it receives from some engine sensors and how TunerStudio displays some of the information it receives When this screen appears the first pull down menu is for EGO O2 Sensor choice TunerStudio provides for several options for popular wideband and narrowband oxygen sensors Choose the option appropriate for your application The next menu offers a choice of Lambda Display methods between AFR and Lambda For most beginning users AFR will be the more useful and is far more commonly used If AFR is chosen the value will be shown as a ratio of Parts Oxygen to Parts Fuel e g 14 7 1 or stoichemetric If the Lambda option is chosen Tuner Studio will display a voltage reading instead of the ratio reading of AFR Temperature Choice is simply the option to choose between Celsius or Fahrenheit temperature display e Crente New Project O OoOO O O E MAP Baro Setup is the option to choose joan between barometric correction for the EGO 02 Sensor manifold absolute pressure reading or pan sa dr not By default this setting is MAP Baro AR TH OFF and unless your ECU has a dual map a ob te sensor it should remain off If you ordered T
29. tle plate is open This value is used by MegaSquirt in one of several fuel enrichment equations to provide more fuel to the motor under high throttle loads and increased airflow Calibrating the TPS is very easy From the Tools option on the Menu Bar choose Calibrate TPS A dialog box will open called Calibrate aim Throttle Position Sensor Figure 4 3 A Closed throttle ADC count 218 Full throttle ADC count 776 GetCurrent Current 1 With the accelerator not depressed foot not on the m pedal throttle closed click Get Current beside Closed rr mrt Throttle ADC Count A numerical value will appear in Figure 4 3 TPS Calibration the box 2 With the accelerator fully depressed pedal to the floor throttle fully open click Get Current beside Full Throttle ADC Count Note If you have calibrated the TPS correctly the blue bar beneath the two ADC count windows As the pedal is depressed and released this blue bar should progress smoothly along its full travel 3 Click Accept the dialog box closes and returns you to the dashboard MAP Sensor The Manifold Air Pressure sensor also feeds vital information to the ECU that is used in the fueling calculation The MAP sensor detects the pressure or vacuum of the air entering the engine MegaSquirt uses an onboard MAP sensor and there are three choices a standard 3 bar sensor and upgraded 4 bar sensor for individuals running high boost levels and a
30. to open the tune file or choose No to simply view the tune file Ifyou choose to use an existing project to open a tune file any changes made in of fline mode will automatically be saved and the ECU will be updated the next time it is connected Ifyou choose to only view the tune file changes can be made but will not be auto matically saved upon closing the program neither will the ECU be updated with the changes when it is connected Setting Engine Constants In order for your MegaSquirt ECU to function correctly it is essential that the ECU knows a few constants about your particular vehicle These constants include how to decode the RPM signal that MegaSquirt receives from the crank trigger how to con vert resistance values from the temperature sensor into temperature readings how long the fuel injectors should stay open and many more variables Calibrating Engine Sensors MegaSquirt uses a handful of sensors to determine the operating condition of the engine These sensors include eCoolant Temperature Sensor CTS eManifold Air Temperature MAT Sensor eManifold Absolute Pressure MAP Sensor eCrank Position Sensor Oxygen Sensor e Throttle Position Sensor TPS These sensors must all be calibrated to read correctly in TunerStudio and provide the correct data to the ECU during engine operation The following sections describe how to calibrate each sensor Note During sensor calibration the MegaSquirt ECU must
31. ur MegaSquirt ECU to the proper settings for your oxygen sensor choose Calibrate AFR Table from the Tools drop down in the Menu Bar The dialog box that appears is illustrated in Figure 4 5 Help Calibrate AFR Table 1 From the EGO Sensor drop down menu AS e choose the oxygen sensor that you used when Volts AFR building your MegaSquirt system If your wide pomtafio pr band system is not listed in the menu choose Pont2 io fis the Custom Linear WB option and input the A correct values that should be obtained from the o write to Controner Wideband manufacturer 2 Click Write to Controller and then Close to dismiss the dialog box re 4 5 AFR Table Calibratio Trigger Wheel Settings MegaSquirt needs some sort of trigger to let the ECU know where the engine is in its rotating cycle and thus when to inject fuel and send a signal to the ignition system There are innumerable ways to configure a trigger system ranging from adapting a stock trigger system from your vehicle using a pickup in a distributor using the Ford EDIS or DSM Mitsubishi CAS or creating your own system Thus it is impossible to illustrate all possible trigger options Your research and build decisions will guide 2 Trigger Wheel Settings B a your setup procedure in this department All op ns tions for the trigger wheel settings are accessed Trigger wheel arrangement Duai whee Tr through the Basic Setup t
32. usly the values in the individual cells of the VE table is a percentage of the volumetric efficiency of the motor at a current fuel load and RPM speed It is impor tant to note that MegaSquirt does not use a single cell value but instead 12 interpolates values from adjoining cells to provide the smoothest running engine possible Note Neither table should be manipulated without a working Wideband EGO sensor If your vehicle does not have one installed take the vehicle to a professional tuner Table Controls In order to edit a cell in the table simply click the cell It will appear highlighted To select a range of cells click and drag over the desired area to select all cells within that are In the upper right hand corner of the VE table window you will see a series of but tons which control various features related to the VE table Export up arrow and Import down arrow Table These buttons allow you to import a VE table from another Mega Squirt user or export your table to another user without creating a new project file Set To Set a selected range of cells to a specified value n Es Increment Up or Increment Down Use these arrows to increase or decrease the value of a single cell or range of cells by a value of 1 Decrease or Increase Cell Value With a single cell or range of cells selected these buttons will increase each cell by a defined value Scale By This button will enable scaling up
33. with lots of cylinders such as V12 may find the Startup Idle tab and are shown in figure 6 1 thatthe injecting fuel on every tach event gives difficult hot starting This option allows the fuel to be injected on alternate events with twice the In the Cranking RPM field enter the approxi pulse width mate RPM that your motor spins at when crank aja 5 ing Usually values between 300 500 RPM will work Figure 6 1 Cranking Settings The second field is an option for Flood Clear or a TPS value that if exceeded will result in no fuel being injected in order to clear flooded cylinders The recommend ed value for this field is 80 The final option in this window is to inject fuel when cranking with Every rotation or Every Other rotation For most motors the Every option is preferred Burn and Close when finished Priming and Cranking Pulse Ihe Priming Pulse and Cranking Pulse options from the Startup Idle tab control the injector pulsewidths when the engine is being cranked or is being primed before a start Each is dependent on the temperature of the engine coolant as a warm or hot engine takes less fuel to fire than a cold engine The adjustments for these win dows are simple line graphs manipulated by clicking and dragging on the blue points along the yellow lines Each window is illustrated in Figures 6 2 and 6 3 respectively Burn and Close after making changes
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