Voodoo Box installation and tuning
Contents
1. tweak your fuel slope pot Y for the midrange 90 97 cars will most likely be at max fuel output while 99 05 cars may hit 8psi and still be rich at max meaning fuel output can be turned down to hit the desired A F target and increase HP Be aware that all lights will probably come on at high vacuum that doesn t mean anything one way or another 5 Slowly introduce boost while monitoring your boost gauge and A F ratio The idea here is to get as much boost as you can within the guidelines above while being able to maintain your target A F ratio first page and above all the way to redline One way to do this is to leave your fuel output at maximum and increase your boost on the WG actuator 1 2 turn at a time until you hit your A F target all the way to redline If you lean out anywhere including at high RPM lower your boost Once you re satisfied with the fueling put the top back on the Voodoo box Please be very careful in tightening the screws as it s easy to break the bottom half of the case 6 Once your fuel delivery and boost pressure is set you will determine if any more base timing can be dialed in to the system You want the most base timing you can get while NEVER hearing any knock Advance your timing 1 degree at a time and test If you reach a point where you experience knock set your timing 2 degrees retarded from that point to remain conservative Any time you get different gas or it gets a lot warmer out listen again for knock2. A F targets listed earlier in this manual If you do not you can have the car tuned at a dyno shop They will have a WBO2 attached to their dyno Once the car is tuned properly and we recommend a little bit conservatively you should not have to mess with it unless you travel somewhere that has fuel of a lower octane In this case it is best to keep out of full throttle if you do not have the tools available to reduce your boost level or retard your timing manually If you do not tune the Voodoo box with a WBO2 you will need to set things conservatively You may be able to set the wastegate can to around 5 psi and run with the recommended numbers in the beginning of these instructions You may be able to turn your fuel outputs to max and run 1 2 psi more If at any time your car feels like it is bogging struggling not revving freely when you are in boost etc you are lean and you need to increase fuel or reduce boost immediately to prevent engine damage Please consider this only a temporary option until you can gain access to a WBOZ2 for proper fuel tuning Note all other factors held constant the 99 05 Miatas have more headroom in the fuel system than the 90 97 Miatas This means that the later cars can support more boost than the earlier cars will While have seen the M2 cars support between 190 220 rwhp depending on external factors the testing which isn t as thorough yet we have done on M1 cars shows support for around 140 160 rwhp
3. Box The reason is that the 90 93 except 93 CA cars were batch injection while all other Miatas are sequential injection 90 93 except 93 CA 94 05 and 93 CA If you are attaching the Voodoo box to an OTM use the following for your reference along with your car s factory wiring diagram to determine the correct placement of your wires Also determine your chip needs based on the descriptions above red switched B from the main relay black chassis ground blue injector 1 grey injector 2 grey injector 3 grey injector 4 green primary O2 sensor signal Tuning Instructions Suggestions Now that your turbo kit and Voodoo box are installed it is time to tune your car Fuel and timing tuning are essential for safe powerful and reliable operation of your turbocharged engine There are three factors here that need to be addressed fuel timing and boost pressure All three must come together for your car to run at its best There are certain tools that will allow you to tune your Voodoo turbo system properly The most important tool for fuel tuning is a Wideband oxygen sensor with a display This will allow you to precisely monitor your air fuel ratio in real time whereas the stock narrowband O2 sensor that comes in your car will not The stock NBO2 will only tell you 3 things leaner than stoich stoichiometric and richer than stoich If you purchase your own WBO2 you can tune your Voodoo box yourself based on the recommended
4. Find the factory ECU It is above the clutch pedal underneath the dash on 99 Miatas behind the passenger seat on 94 97 cars and under the passenger footrest on 90 93 cars Undo the plugs attached to the ECU The ECU harness plugs below are viewed from the harness side with the tab on top i 3 Use the included butt connectors to connect the Voodoo Box to the stock Ti ECU You ll need to cut the original wire twist the appropriate Voodoo box wire around one of the cut and stripped ends crimp it into the butt connector then crimp the other end into the butt connector Cut and connect one wire at a time to ensure that you don t confuse the different wires Once connected give a slight tug to ensure that the wires are firmly held in the butt connector CONFIRM YOUR CONNECTIONS WITH A MULTIMETER If the wire color and location don t agree with our schematics match the location instead of the color Once all of the wires have been connected CAREFULLY heat shrink the new butt connectors The heat shrink helps seal the connector and acts as a Strain relief so it s a good thing to do Be very careful using the heat gun as you don t want to melt any other wires 4 Using the supplied plastic T connector tap into the vacuum line running to the boost gauge Attach the new vacuum line to the Voodoo Box MAKE SURE THIS IS SECURE 5 Use double sided tape to attach the Voodoo Box to the stock ECU case 1999 00 oodoo Box ECU ey a ee Cac ae ed w
5. and retard 1 degree as necessary Remember each marker on your timing plate is 2 degrees The 10 degree marker is labeled
6. Hyin Miata We make Matas fly 499 35 Rd Palisade CO 81526 E mail tech flyinmiata com 970 464 5600 tech 1 800 FLY MX5S 359 6957 orders only Voodoo Box Calibration Installation amp Turbo Kit Tunina 01 17 11 On when fuel is added by pressure If pol Gi setting os too low the light can be on all the tine When running at idle the red ight should be on Blinking red light with engine running sienals that a Gray wire is not connected properly With power on and the engme not running these 3 liehts will be on Ifthe chine is running and all 3 lights are still on the blue wire go se ag is not connected properly On when O2 sensor is being altered If pot S setma is boo low light can be on all the time Pot G Sets the pressure when fuel starts to be added Higher setting increase the pressure needed to start adding fuel Pot Y Fine Adjustment to the Fuel vs Pressure Ramp Higer settings gets to max fuel sooner Pot i Sets the Maximum Fuel Limt Range 0 to 6 3ms Note When set to zero the pressure light will not come on Pot S Sets the pressure when the O2 adjustment will hesin 1 Set pot S to where its LED comes on just before 0 on your boost gauge 2 Set pot G to where its LED comes on just after 0 on your boost gauge The S LED should come on just before the G LED when accelerating 3 Set pot R to achieve the desired A F ratio when approaching redline at full throttle
7. If at any time you have questions about tuning or want to run an idea by us feel free to call the Flyin Miata tech line Now that the theory is down here is a step by step to get you going after everything is installed and you are ready to start tuning your Voodoo turbo system Remember to make absolutely sure that the vacuum hose into the Voodoo box is secure 1 Set your initial boost low using washers as described in the turbo kit installation instructions Shortening the distance between the wastegate itself the pin coming out of the turbo and the actuator gold can raises boost and lengthening the arm lowers it We preload the arm length to around 6 psi if you want to be conservative you may want to back it off Test and repeat as necessary If you lose that little C clip you re on your way to Home Depot A good way to avoid losing the clip is to have a magnet next to the clip when you pry it off 2 Start the car and check your timing Set your timing as appropriate to 4 degrees of advance as described above as a starting point If at any time in the procedure below you hear knock rather than retard the timing any more you need to lower your boost If you want more boost you ll need a standalone ECU and larger injectors 3 With the car running you need to set your O2 adjustment and fuel addition parameters S and G potentiometers respectively Once the idle has settled down a few seconds after starting disconnect the vacuum
8. If you want to eek a little more you can usually go with around a 15 larger injector more than this limits your car s ability to maintain a stoichiometric idle and cruise for closed loop conditions which is a problem for emissions and fuel economy This means that 90 93 cars blue top injector can use 94 97 tan top injectors 94 97 cars can use 270cc injectors and 99 00 cars maroon injector can use 01 05 purple injectors We have seen 01 05 cars support RWHP in the low 200s on stock injectors and honestly if you want more power than that you should upgrade to a standalone ECU since the 6 degrees max static retard from our adjustable timing wheel will not cut it 01 05 cars have higher compression Now on to timing tuning A tool that is useful for tuning the timing on 99 05 Miata is an OBD 2 scantool that has the ability to monitor voltage output from your factory knock sensor This will detect knock long before you can hear it If you have a 90 97 Miata or no scantool you will have to listen for knock when tuning your timing and assuming your A F ratios are good back off a couple degrees when you advance to the spot where you hear any ALL TUNING MUST BE DONE WITH THE TOP UP AND WINDOWS UP You ll never hear a ping with the windows or top down If you set up the timing in the winter you will likely have to back it off some more when it turns to summer as warmer intake temps will increase the likelihood of Knock The Voodoo box only control
9. This should be determined with a Wideband O2 sensor We recommend 10 0 1 12 5 1 depending on how much boost more boost richer lower numbers and how good your gas is 93 can go a little leaner 91 should be richer 4 Set pot Y such that the desired A F ratio is maintained in the lower RPM at full throttle This is the slope up to the pot R value but not necessarily the same value If you go lean when you tip in or when you surprise the throttle say on a downshift raise this value If you go rich and bog under these conditions lower it You re looking for a value between 10 0 and 13 0 when you first see boost 5 The following are values that we have found to work in cars tuned here at FM It is however impor tant to note that there is not a lot of consistency when it comes to dialing these in so to be safe we highly recommend tuning the Voodoo box with a Wideband O2 sensor Turbo Y 8 R 6 Super Y 5 R 4 The Voodoo Box intercepts the stock injector signals When the car is under boost the signals are modifed to deliver more fuel This allows the user to take advantage of the extra headroom in the factory fuelling system Under normal driving conditions cruise starting idling and the like the injector signal is unchanged This unit also includes an O2 spoof to eliminate lean tip in It does this by modifying the factory O2 sensor under boost while in closed loop 1 Disconnect the negative terminal on the battery
10. hite with red stripe pin 1B kas dad oaia bl MM 7 Neal Hall Ba lack black with yellow stripe pin 3A leee le eke kemen lezaj e Aor blue yellow with black stripe pin 3W grey violet with green stripe pin 3X grey yellow with red stripe pin 3Y grey yellow with green stripe pin 3Z green blue pin 2C 2001 05 Voodoo Box ECU red white with red stripe pin 4AF black black pin 3A blue yellow with black stripe pin 2A grey violet with green stripe pin 2D grey yellow with red stripe pin 2G grey yellow with green stripe pin 2J green blue pin 4W 1996 97 Voodoo Box ECU red white with red stripe pin 4B black black pin 4D blue yellow pin 4U Eb ae va vvey v eve grey yellow with black stripe pin 4V Tm a 2 grey green with white stripe pin 4W F grey green pin 4X green red with green stripe pin 3C 1994 95 Voodoo Box ECU red white with red stripe pin 1B black black pin 2B blue yellow pin 2U grey yellow with black stripe pin 2V grey green with white stripe pin 2Y grey green pin 2Z green red with blue stripe pin 2N ed white with red stripe pin 1B G iyi olack black pin 2B iP iN 4L 4J iH olue yellow pin 2U Yew es 20 20 2M_ amp K 2I 2 grey yellow with black stripe pin 2V grey not used except 2Y on 93 CA cars grey not used except 2Z on 93 CA cars green red with blue stripe pin 2N There are 2 separate chips for the Voodoo
11. line going to the Voodo box Do NOT remove it at the Voodoo box as depending on the hose size the hose might be glued on Disconnect the hose at the barb where it can be easily reconnected Use something to plug the end of the line going to the engine to ensure that you don t have a vacuum leak The end of the hose going to the Voodoo box needs to be open to the atmosphere Adjust the S pot so that the light is just on and the G pot so that the light has just gone out In other words spin the S parameter so that the light goes out Now adjust it back until the light turns back on but stop as soon as it comes back on The G pot is adjusted opposite turn the pot until the light turns on then turn it back so that the light has just gone out Since the map sensor is now seeing atmospheric pressure you ve just adjusted the S pot to turn on just before atmospheric pressure and the G pot to turn on just after Fine tuning may be needed but this should be close If one or both of the lights won t come on regardless this doesn t mean you have a defective box It just means that you have to adjust these parameters by driving and watching for 0 on your gauge 4 Once you are ready drive the car and stay out of boost Having a passenger help is much safer for tuning the Voodoo box by the way Turn your fuel delivery output to max output pot R to start on the conservative side If you are tuning for max output you will most likely leave it there and just
12. max 4 degrees 6 degrees retarded and advance as much as you can while keeping it reliably south of where any knock occurs Note In general we don t recommend over 8 psi when your available retard is 6 degrees Maybe a little less for California maybe a little more for Texas etc Remember with a static retard your off boost timing is down as well which reduces throttle response and raises your exhaust gas temps If you want more boost you should upgrade to a standalone ECU such as our Hydra for 90 05 Miata We have recommended boost levels for our Voodoo and Voodoo 2 turbo kits however within the nature of tuning and variability there is some fudge factor aE BOWSER For example if you live in California the worst gas in the U S for turbo cars 91 octane that is more like 89 90 and you are tuning for the best running car possible you simply won t be able to run as much boost as someone with the same car and the same kit in Texas The best pump gas we ve seen 93 octane that smells like race gas What we are hoping for with optimal tuning is to get your car to the best of its ability given its surroundings For 90 97 cars start at 5 psi and work up from there as you tune For 99 05 cars start at 6 If you have an intercooled kit you will simply end up tuned with more boost than you would have if you did not have the IC Your fuel and timing tuning along with available octane should dictate the boost level that you can attain
13. s fuel With any turbo kit you must also control your timing as stock timing is too much for boost If you have a 90 97 Miata you can dial in a static amount of timing retard by adjusting your Cam Angle Sensor and checking its position with a timing light Refer to a service manual for how to do this When using a timing light jump GND to TEN in your diagnostics connector box with the flip up lid by the driver s side shock tower so that you force the factory ECU into open loop We recommend starting with 4 degrees of timing which is 6 degrees retarded from OEM 10 degrees Retarding your timing will move the notch clockwise on the backing plate marks As conditions allow you can advance from there bringing it back counter clockwise For 99 05 cars we include an adjustable timing wheel with our Voodoo and Voodoo 2 kits that is slotted to allow for up to 6 degrees of static retard verify where you are with a timing light You ll need to remove the alternator and power steering belts refer to the service manual for clarification then remove the crank pulley The crank pulley is removed by taking out the four M6 10mm head bolts torque them back down 150 in lbs NOT ft lbs when you re done This is NOT the big bolt in the middle Remove the original timing wheel and reinstall the new as shown the stamp is now a sticker Always tighten the bolts holding the timing wheel even if you intend to re adjust it later Once again start with the
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