Bilstein Catalogue Web
Contents
1. Q A Why is the shaft on a Bilstein shock always extended As monotube gas shocks Bilstein shocks are under gas pressure to deliver the most responsive valving for ultimate control This pressure called the gas reactive force and Bilstein s perfect internal seals force the shaft to be extended Is the car more difficult to scale with Bilstein shocks Bilstein shocks have no effect on the results as you weigh the four corners The gas reactive force in Bilstein shocks may raise your car s ride height slightly Simply adjust the chassis downward to the desired ride height Does Bilstein offer specific applications for the various dirt and asphalt racing series As the set up charts in this catalog indicate Bilstein has shocks specifically valved for both dirt and asphalt surfaces of various track lengths Are Bilstein shocks difficult to understand and use After reviewing the various set ups in this catalog you ll be ready to select the proper shocks for your specific race car Bilstein valving is precise Once you purchase your Bilstein shocks you can be certain that they will perform at peak efficiency throughout their long life ANSWERING THE RACERS QUESTIONS The following are some commonly asked questions and Q can buy twin tube shocks for less money than their corresponding answers concerning Bilstein mono tube gas pressure shock absorbers Bilstein shocks Why should2. c Ead C cl cr BILSTEIN 7 N pee Q o N Q t a Y o N 2 wn v Q i a e oS 2 o 2 pum o t eis ro 2 E 1 a a Les x o A gt lt s _ Motorsports Shocks Model Application Description Page AK Series Pure stock Enduro 46mm diameter sealed 8 9 Street Stock stock mount steel body stock mount Mini Stock Shocks and struts SG Series Stock Cars IMCA UMP 36mm diameter sealed 10 Modifieds Midgets Steel body converts Mini Sprints Modified Lites to coilover applications and Dwarf Cars i SZ Series Modifieds and 46mm diameter sealed steel 11 12 SL Series Late Models body converts to coilover applications off the shelf valvings SN Series Modifieds Late Models 46mm diameter steel body 13 and Sprint Cars aluminum billet cap with schrader valve linear or digressive piston rebuildable SB Series Sprint Cars Midgets Ultra lightweight 36mm aluminum 14 Mini Sprints TQ Midgets body sealed non coilover design Micro Midgets and or rebuildable threaded body Formula Cars models available ASN Series Modifieds Late Models 46mm diameter threaded 15 and Sprint Cars aluminum body with schrader valve and circlip rod guide linear or digressive piston rebuildable optional adjustable shaft BGT Series Late Models Super Late 46mm diameter threaded 16 Mod
3. spend the extra money A As we point out in this catalog Bilstein shocks are fabricated from the highest quality components for long life performance Typically Bilstein shocks are only slightly more expensive than twin tube brands Since they will far outlast conventional shocks Bilstein shocks cost much less over the long run Bilstein shocks are the least expensive way to lower your lap times The companies that sell only twin tube low pressure gas shocks say their design outperforms monotube high pressure gas shocks How can I know the truth Take a trip to a local discount department store that sells replacement shocks for cars and trucks that drive on the street You ll find shocks priced from about 8 99 to 29 99 All of the shocks on display will be twin tube shocks Their price reflects the fact that twin tube technology is relatively unsophisticated and very low cost to produce At a new car dealership you ll find that low cost base line cars and trucks are factory equipped with twin tube shocks that add very little to the cost of the vehicle Factory installed Bilstein shocks can also be found on Mercedes Benz Ferrari Porsche Toyota TRD Roush and many other high performance vehicles around the world Finally take a stroll through the pit area at a NASCAR Cup Busch Craftsman Truck CART IRL or Formula One race and you ll find not a twin tube shock in sight The top racing engineers in the world always us
4. super Late Model Asphalt Set Ups Page 31 f M ur How To Shock Tune Your Chassis Trouble Shooting The Car At The Track For Complete Information Contact Aftermarket amp Motorsports East Aftermarket amp Motorsports West Mooresville NC Poway CA Phone 877 666 7662 Phone 800 537 1085 bilstein com 3 BILSTEIN Se WA C 1E Digressive Short Track Shock Numbering System EXAMPLE S 7 Z 60 60 aa ae S Steel body grooved for snap rings to seat coilover kit A Aluminum body threaded for spring Seat nut BODY SERIES REBOUND COMPRESSION IMPORTANT Rebound and Compression are expressed in the industry standard 4 5 6 etc with a second digit to allow for a degree of dampening between whole numbers For example 50 means 5 55 means 5 1 2 Linear Short Track Shock Numbering System EXAMPLE B 46 0210 300 100 FRZBISTER 3 REBOUND COMPRESSION Monotube vs Twin Tule NITROGEN GAS AREA Puts shock oil under pressure to totally prevent cavitation foaming and shock fade DIVIDING PISTON WITH O RING Separates gas and oil and is moveable to accommodate rod movement into the tube Bilstein shocks are not gas oil emulsion shocks MONOTUBE SHOCK BODY Inside wall has finished tolerances of an engine cylinder Outer surface is cad mium or nickel plated for durability Single tube design dissipates heat more effectively than
5. or only on right rear When analyzing corner exit or acceleration handling realize that the chassis is affected by Rebound rate in front Compression rate at rear Keep in mind that there are many adjustments on your chassis other than shock absorbers The oversteer understeer balance may be affect ed by stagger tire compound wheel spacing spring rates sway bar panhard and others Shocks can be used to fine tune your chassis to gain that last few tenths of a second on the track If you have any questions contact our technical department at 877 666 7662 31 Ls EM iac el a penny A E 5 wis m ail es i UL mul s E f i T d pus ri a 2 Mooresville NC Facility Poway CA Facility Aftermarket amp Motorsports East Aftermarket amp Motorsports West Mooresville NC Tech Hotline 877 666 7662 bilstein com Distributed By Printed in U S A 2008 PP2450 308 A company of ThyssenKrupp Technologies Bilstein Gas Pressure Shock Absorbers ThyssenKrupp Bilstein of America Poway CA Phone 800 537 1085 BILSTEIN trs
6. 00 300 100 Loe anie E RAIER R VALVING 2080 208 72 Basic Set Up Swing Arm VALVING 6010 6010 eae R F VALVING 6010 LR R R 6010 Consult Bilstein Service and Valving Manual for build schematics for these valve stacks Custom valved shock NOTE All of the above set ups assume your chassis uses 7 stroke shocks on the front and 9 stroke shocks on the rear When ordering from your Bilstein dealer be sure to ask for the appropriate stroke for each corner of your chassis mr BILSTEIN LM C A Type Modified Asphalt RECOMMENDED SET UPS NOTE These recommended combinations can use Bilstein SZ SL SN ASN or BGT Series Take Apart shocks A custom valve charge will be incurred when ordering sealed SZ or SL Series shocks not listed on pages 12 and 13 of this catalog 1 4 Mi to 3 8 Mi Shallow Bank Low Speed Corner Entry VALVING 270 90 270 90 LF RE VALVING 6010 xu on 5030 1 4 Mi to 3 8 Mi Banked High Speed Corner Entry VALVING 270 90 180 120 eR VALVING 6010 zn Dos 6010 3 0 Mi to 1 2 Mi Shallow Banked High Speed Corner Entry VALVING 210 90 180 120 T SIERE R VALVING 6010 inu 5030 3 8 Mi to 1 2 Mi Banked High Speed Corner Entry PART NO 7Z 6060 7Z 6060 Sel lave PART NO 97 5030 Seg 392 5050 1 2 Mi High Banked Very High Speed Corner Entry PART NO S72 6040 S72 6040 L F R F PART NO S97 6040 L R R R S9Z 6040 NOTE All of the above set ups assume your chassis uses 7 stroke
7. 555 or dyes S72 4040 CE 72 5050 97 4040 LR RR PART NO 97 4040 Custom valved shock DP 1 Package is available for an additional cost This is a custom valving package for dry slick track that produces more feel Dirt Modified North East Modified RECOMMENDED SET UPS NOTE These recommended combinations can use Bilstein SZ SL SN ASN or BGT Series Take Apart shocks A custom valve charge will be incurred when ordering sealed SZ or SL Series shocks not listed on pages 12 and 13 of this catalog Basic Set Up PART NO B46 0210C B46 0202C VALVING 162 55 Le hse 162 55 PART NO B46 0207B L R RR B46 0203A VALVING 208 72 208 72 Side Bite VALVING 162 55 m 208 55 VALVING 162 100 L R R R 208 72 VALVING 162 55 RF 162 55 DE VALVING 6010 L R R R 5030 Syracuse Set Up VALVING 300 78 ME 210 78 ie VALVING 270 78 L R R R 230 100 Custom valved shock 29 26 Super Late Model Dirt RECOMMENDED SET UPS NOTE These recommended combinations can use Bilstein SZ SL SN ASN or BGT Series Take Apart shocks A customer valve charge will be incurred when ordering sealed SZ or SL Series shocks not listed on pages 12 and 13 of this catalog Basic Digressive Set Up Four Link VALVING 4040 5050 lee R F VALVING 3050 SRR 4040 Dry Slick Digressive Set Up Four Link VALVING 3050 5030 oe R F VALVING 3050 LA R R 3030 Basic Linear Set Up Four Link VALVING 300 1
8. NO S7G 3050 S7G 3050 ET DR dotem lav iat PART NO W Valve Stack S86 4040 S86 4040 With Wing Heavy Tacky Track Dirt PART NO 976 5555 976 4545 IPM isthe ER DRR PART NO W Valve Stack 8G 7035 8G 5599 With or Without Wing 1 4 To 3 8 Mi Average Bank Asphalt PART NO W Valve Stack 7G 5555 P 7G 5555 PART NO W Valve Stack 8G 5050 8G 5050 With or Without Wing 3 8 to 1 2 Mi Fast High Bank Asphalt PART NO W Valve Stack S7G 9999 t 976 5555 ER insiste PART NO W Valve Stack 8G 5555 8G 5555 NOTE It is assumed on this set up sheet that the car utilizes 7 stroke shocks in front and 8 stroke shock in the rear Before purchase meas ure shock mounts center to center at static ride height Check the extended and collapsed measurements on catalog page 10 to determine if your car needs S6G S7G or S8G series shocks S8G s normally replace competitor s 9 stroke shocks 23 24 LM C A Type Modified Dirt RECOMMENDED SET UPS Basic Set Up 2 Link 76 3535 or 76 4545 or Hopp Re 372 4040 TIT 372 4040 PART NO S97 3030 iM nr S97 3030 Basic Set Up 4 Bar 76 3535 or 76 4545 or BRI ME S7Z 4040 ie las S72 4040 PART NO S97 3050 as Pile S97 3030 Suggested For Dry Slick Conditions 7G 3535 or 7G 3050 or TATAD 7Z 2040 Oe ele 7Z 3050 9Z 4020 2 Link L R RR PART NO 597 3050 4 Bar 9Z 3030 Suggested For Heavy Tacky Conditions 7G 4545 or 7G 5
9. added strength and ease of coil spring adjustment e Optional composite wear sleeve available to protect shock tube e Optional adjustable shaft e Available in 7 and 9 strokes Part No Description Extended Length Collapsed Length B46 60BG C 7 00 stroke 21 42 14 84 B46 60BG9C 9 00 stroke 29 04 16 75 Optional coilover mounting kit hardware and gas fill tool are sold separately Part No B4 BOA 0000190 Part No 193000 BILSTEIN Si Big Track Series Rebuildable Shocks for NASCAR Classes B46 60BG8 e Aluminum construction e 60mm gas chamber e Increased oil volume e Base valve option e Linear digressive and RBT piston available e Adjustable shaft option e Screw in rod guide B46 GN3 e Aluminum construction e 46mm body e Linear digressive and RBT piston available e Adjustable shaft option e Screw in rod guide Part No Extended Length Collapsed Length B46 60BG8 22 00 15 67 B46 GN3 24 40 16 60 B46 GN3 B46 60BG8 17 ee Disassembly collar B4 BOA 0000287 18 a UA Wm mmm Tools And Accessories Linear valving kit ZB4 BOA 0000149 e Fill kit 192116 e Disassembly collar B4 BOA 0000287 e Service manual 194000 e 36mm assembly wrench E4 X 1 Z002A00 e 46mm assembly wrench 193070 e Shock oil gallon 193031 e Digressive valving kit 4B4 BOA 0000150 2 boxes e Linear valving kit B4 BOA 0000149 2 boxes e 14mm steel assembly ne
10. alve allows for lower rod pressure e Can be added or retrofitted to any SN or ASN shock 19 l lt m wi WI i BILSTEIN Sw NAA 17S Orem Li Dwarf amp Mod Lites RECOMMENDED SET UPS Basic Set Up Asphalt 454 PART NO S6G 3535 aller S66 4545 PART NO S66 3030 SE S66 3030 Basic Set Up Heavy Hooked Up Surface PART NO 6G 3535 6G 4545 Ia PART NO S66 3535 LR R R S6G 4545 Basic Set Up Slick Surface PART NO 6G 3030 6G 2040 i EE PART NO 6G 3010 SIN 6G 3010 NOTE All of the above valving recommendations utilize our S6G Series Mini Racing shock Consult page 10 for the extended length and col lapsed length for this product If your car requires a longer shock consider using the S7G Series shock also featured on page 10 Also con sider moving the upper shock mounts up or down to accommodate either the S6G or S7G Series Mini Racing Shock 20 Mini Sprints 600cc to 750cc RECOMMENDED SET UPS Basic Set Up Dirt PART NO S66 3030 S6G 2040 IER R F PART NO 66 4020 di S6G 4020 Basic Set Up Asphalt PART NO 6G 4020 6G 3535 EFSER F Basic Set Up Dirt PART NO 6G 3010 6G 1030 EPAR p LR IRR PART NO 6G 3010 6G 3010 Basic Set Up Asphalt PART NO S6G 3535 S6G 3535 ae R F PART NO S6G 6020 LR R R S6G 4545 NOTE All of the above valving recommendations utilize our S6G Series Mini Racing shock Consult page 10 for the extended length and col
11. be or body In practical application shock absorbers are necessary to maintain maximum tire patch contact to the track as the car corners and negotiates irregularities on the race track surface Spring rates determine how far your chassis rolls pitches or Squats Shock rates determine the length of time it takes for each of these movements to occur Rebound damping controls the movement of that part of the car s Sprung mass that is stored in a compressed spring The rebound damping rate determines how long it takes for the compressed spring to return to the static ride height The larger the rebound figure the more the shock resists the compressed spring s effort to rebound and the longer it takes for the chassis to return to the static ride height Compression damping controls only the oscillation of the car s unsprung weight Therefore it is normal to use less compres sion damping than rebound damping The exception occurs when we choose to slow the downward movement on a partic f BILSTEIN lt LT ular corner of the car to mimic the effect of a stiffer spring Here are some guide lines to use when shock tuning your chas Sis at the track or making the best decisions during initial set up We are making the assumption that you have removed as many variables as possible and are using the best combination of springs weight wheel spacers tire compound stagger etc Utilizing the Think Trac
12. ce in an aluminum shock at an economy price e Bilstein s famous consistent fade free performance e Optional adjustable shaft compression canister e Optional composite wear sleeve available to protect shock tube Part No Description Extended Length Collapsed Length B46 ATAL4 ATAD4 4 00 stroke 14 21 10 45 B46 ATALS ATADS 9 00 stroke 1629 11 25 B46 ATAL6 ATAD6 6 00 stroke 18 37 12 66 B46 ATAL7 ATAD7 7 00 stroke 20 23 1339 B46 ATAL8 ATAD8 8 00 stroke 22 26 14 70 B46 ATAL9 ATADO9 9 00 stroke 23 60 15 08 ATAL Linear ATAD Digressive Optional coilover mounting kit hardware and gas fill tool are sold separately Part No B4 BOA 0000190 Part No 193000 NER Id LEAL A Fd a WG A ILE EIE OLEO ER C UIN 4 m BILSTEIN S IIN 15 siii Se 16 Uv Ho PEEL HL HH HH HH PA R Hh a ae 4 BGT Series Designed for but is not limited to Late Models Super Late Models Sprint Cars Dirt Late Models and Big Block Modifieds 46mm aluminum body with extra large 60mm nitrogen compartment e Coilover design e Available with or without base valve e 14mm piston shaft e 60mm nitrogen compartment reduces rod pressure and keeps pressure more consistant to heat changes e Bilstein s famous consistent fade free performance e Racer rebuildable and revalvable e Hard coat anodizing for strength and durability e Coarse threads on shock body for
13. d pistons create small amounts of damping force at low piston speeds and low bleed pistons create large amounts of damping force at low piston speeds 400 0 00 0 6 0 8 0 10 0 0 0 2 0 4 0 6 0 Velocity In Sec Velocity In Sec y This graph was generated by a Bilstein U37T linear piston using 36 4 This graph depicts the Bilstein U37T linear piston combined with 37 4 mm diameter cover plates resulting in a high bleed or high frequen cover plates The result is valving with more low speed control Cy style short track linear valving 4 0 6 0 8 0 10 0 0 0 2 0 4 0 6 0 Velocity In Sec Velocity In Sec Our standard digressive valvings can be built with a wide range of shown here is a standard digressive valving using a low amount of bleed patterns The one shown here is a very high bleed valving typical bleed Notice the large amount of force developed on both compres of one that would be used on the rear suspension to promote traction sion and rebound at slow piston speeds The new Bilstein RBT Digressive piston utilizes a check valve that When the RBT Digressive piston s check valve is installed on the when installed on the compression side of the piston creates less rebound side there is less bleed and therefore more force created bleed and therefore more force on the rebound side on
14. e called gas charged contain a small plastic bag holding a minuscule amount of gas under a small amount of pressure This design while low in cost to manufacture is ineffective on the track Under extreme G forces on rough tracks and in high heat conditions gas charged twin tube shocks do not resist cavitation as effectively as monotube gas pressure shock absorbers This is the reason that all NASCAR Indy Car Formula One and Off Road racers long ago discarded twin tube shocks in favor of monotube gas pressure technology 5 ah t 3 Bilstein shocks don t fade Your chassis will handle as good at the end of the race as it did at the start F 1 Because the valvings are consistent your set ups will be more precise 4 Bilstein shocks are rugged They last for years and are rebuildable and revalvable 2 Bilstein s larger piston and deflective disc valving develop control force when you need it at the slightest movement of the suspension You ll get weight D transfer when you need it better control under braking and your tires will stay on the track through the rough spots 5 When the advantages of Bilstein gas pressure shocks are tallied up you will have spent less money on shock absorbers and collected more money at the pay window Bilstein s unique deflective disc valving system allows for exact valving of both compression and rebound movements
15. e monotube gas shocks By searching out the facts you will know the truth and the truth will make you faster Bilstein Pistons and Valves Shock absorbers produce damping force by forcing oil under pressure through holes in the piston Shock damping forces increase as the vertical velocity of your suspension increases In other words when the shock s piston speed through the oil increases so do the damping forces Shock dynamometers measure the amount of damping force generated by the piston as it accelerates and decelerates from a dead stop to a chosen peak velocity usually 10 to 12 per second The forces are normally depicted in the form of a graph that plots shaft velocity in inches per second on the horizontal and damping forces in pounds on the vertical Compression forces are normally expressed from zero going up and rebound forces from zero going down although that can be reversed by the dyno operator with a single key stroke Below study the shock dyno graphs that illustrate the differ ent style performance curves using two unique piston designs available from Bilstein Bleed The flow of oil through the holes in the piston is referred to as bleed or sometimes as bypass The bleed characteristic in the shock s piston design determines the amount of slow piston speed control available before the shock s valving comes into affect to control forces developed at higher velocities High blee
16. e performance e Threaded version is racer rebuildable revalvable repairable and features adjustable rod pressure to suit any condition e Schrader valve counter sunk out of harms way e Threaded body version available in 6 7 and 8 strokes e Sealed smooth body version available in 7 stroke for torsion front chassis e Can be built with linear standard digressive or compression only bypass digressive pistons e Optional composite wear sleeve available to protect shock tube Part No Description Extended Length Collapsed Length Threaded Body B36 ATAL6 ATAD6 5 00 Stroke 17 32 11 44 B36 ATAL ATAD 7 00 stroke 20 08 12017 B36 ATAL8 ATAD8 9 00 stroke 22 46 14 06 Smooth Body B36 ATAL7SB ATAD7SB 7 00 stroke 20 08 12 90 Optional coilover mounting kit hardware gas fill tool and rod guide spanner are sold separately Part No B4 BOA 0000257 Part No B4 BOA 0000259 Part No E4 XS1 Z002A00 ASN Series Designed for but is not limited to Modifieds Late Models and Sprint Cars 46mm 1 81 diameter threaded aluminum body with schrader valve and circlip rod guide e Rebuildable shock can be assembled and disassembled for rapid repair or valving change e Hard anodized for durability e Valve stacks and valving kits available separately e Available with linear or digressive piston e Every part of the ASN shock is available separately for economical repair e World class performan
17. edle E4 B0A 0000560 e 46mm slide on coilover kit 2B4 BOA 0000117 e 46mm aluminum coilover kit 2B4 BOA 0000190 e 46mm gas fill tool 193000 e 36mm slide on coilover kit B4 B0A 0000187 e 36mm aluminum coilover kit B4 BOA 0000257 e 36mm gas fill tool B4 BOA 0000259 e 46mm composite wear sleeve ASN amp BGT Series E4 RO0 Z016A00 e 36mm composite wear sleeve ASB Series E4 RO0 Z016A01 e Bump Cap E4 SB3 Z004A02 e Wiper Seal 4 D11 Z002A00 e Valving Nut for Adjustable Shaft 193734 e Compression Check Valve 193732 e Rebound Check Valve 193734 p t BILSTEIN lt ope Optional Shock Components E E Adjustable Shaft e Excellent for dirt racing e 6 position adjustment knob e Broad adjustment for each position e Can be added or retrofitted to any SN ASN or BGT shock e Can be used as open jet e Can be used with rebound check valve e Can be used with compression check valve o 5 6 7 8 amp 9 Lengths e 1 Extended Rod Available Double Adjustable Shaft e Excellent for road racing e 10 position rebound knob e 10 position compression knob e Linear adjustment with rebound and compression tuned independent ly e Shaft utilizes new 1 to 1 billet lin ear piston Compression Canister e Excellent for both dirt and pavement e Knurled aluminum body e 10 position adjuster e Hand operated adjuster no tools required e Adds compression with each position e Base v
18. els Sprint Cars aluminum body with 60mm Dirt Late Models and nitrogen compartment 14mm Big Block Modifieds piston shaft rebuildable Big Track Rebuildable shocks B46 60BG8 46mm aluminum 17 Series for NASCAR classes body with 60mm gas chamber linear digressive or RBT piston screw in rod guide B46 GN3 46mm aluminum body linear digressive or RBT piston screw in rod guide optional adjustable shaft BILSTEIN Si Table of Contents ad Page 4 Short Track Shock Numbering Systems j Page 54 een Monotube vs Twin Tube Shocks Page 61 5 Why Race On Bilstein Shock Absorbers Q amp A Page7 Bilstein Pistons and Valves Page 8 9 AK Series Mounting Types and Specs Page TB SG Series Page qi NL SZ Series Page 12 4 EM SL Series Page 13 M SN Series Pagel 4 S ASB Series Page 15 ASN Series Pagemio e BGT Series Recan a Big Track Series Paged 29 2m Tools and Accessories Page de uu Adjustable Shafts and Compression Canister Page 20 MP Dwarf Car Set Ups Page 21 P Micro Midget and Modified Midget Set Ups Page22 sae Midget and Mini Sprint Set Ups page 22 1T g Sprint Car Set Ups Page 24 am I M C A Type Modified Dirt Set Ups Pag Dirt Modified Set Ups Page 26 4 Super Dirt Late Model Set Ups Page 2am I M C A Type Modified Asphalt Set Ups Page 28 i erts Asphalt Modified Set Ups Page 29 LAF kh Late Model Stock Set Ups Page 30 1 M
19. k below study the following list of Suggestions These are not rules not even rules of thumb but they are tendencies that are more often true than not when rac ing late models and modifieds on asphalt or dirt surfaces THINK TRACK WHAT YOU WANT THE CAR TO DO D n YOU HAVE TO DO IS DETERMINE FROM ENTRY TO EXIT JUST THINK IT THROUGH N Trouble Shooting the Car at the Track If your car Is Loose Oversteer from 0 to 90 e Increase compression rate on front e Decrease rebound rate on rear or only on left rear Tight Understeer from 0 to 90 e Decrease compression rate on front or only on right front e Increase rebound rate on rear or only on left rear When analyzing corner entry or deceleration handling realize that the chassis is affected by Compression rate in front Rebound rate at rear Bilstein shocks are famous for their superior performance on very rough asphalt or rutted dirt tracks You may need to choose a shock with more compression damping than found on our set up sheets under extreme rough track conditions We have included this section in our catalog to broaden your under standing of the function of shock absorbers and to show you the effect they have on handling Loose Oversteer from 90 to 0 e Decrease rebound rate on front e Decrease compression rate on rear Tight Understeer from 90 to 0 e Increase rebound rate on front e Increase compression rate on rear
20. lapsed length for this product If your car requires a longer shock consider using the S7G Series shock also featured on page 10 Also consider moving the upper shock mounts up or down to accommodate either the S6G or S7G Series Mini Racing Shock 21 22 Midgets Chassis Doemelt Baily Beast Ellis etc RECOMMENDED SET UPS Basic Set Up Dirt and Asphalt 6G 3535 or 6G 3535 or HAAR LE 7G 3535 WE er 7G 3535 PART NO 7G 3535 2123 iur S76 3535 Suggested For Dry Slick Conditions Dirt 6G 3030 or 6G 2040 or IE 7G 3030 Beal leas 576 2040 PART NO S76 4020 d S76 4020 Suggested For Heavy Tacky Conditions Dirt 6G 3535 or 6G 3535 or A 7G 3535 LE RF 7G 3535 LRA RR PART NO 7G 5030 7G 4545 Fast High Bank Asphalt 6G 3535 or 6G 4545 or Fart 7G 3535 LF REF 7G 3535 PART NO S7G 3535 LR RR 976 4545 NOTE All of the above valving recommendations utilize our S6G Series Mini Racing Shocks on the front and S7G Series Mini Racing Shocks on the rear Consult page 10 for the extended lengths and collapsed lengths for these products If your car will not accommodate shocks of these dimensions consider moving your upper shock mount up or down to the desired static center to center dimension Sprint Cars RECOMMENDED SET UPS With Wing Basic Set Up Dirt PART NO 7G 3535 7G 3050 LB lh ng ERIP RR PART NO W Valve Stack S8G 5050 S8G 5050 With Wing Dry Slick Track Dirt PART
21. lates oil and nitrogen gas charge e Rebuildable shock can be assembled and disassembled for rapid repair or valving change e Nickel plated for durability e Valve stacks and valving kits available separately e Available with linear or digressive piston e Every part of the SN shock is available separately for economical repair e World class performance at an SN Saturday Night price e Bilstein s famous consistent fade free performance e Optional adjustable shaft compression canister Part No Description Extended Length Collapsed Length B46 LTA5 DTA5 9 stroke 16 32 11 48 B46 LTA6 DTA6 stroke 18 13 12 42 B46 LIA DIA 7 stroke 20 08 13 50 B46 LIA8 DIA8 8 stroke 22 07 14 47 B46 LIA9 DIA9 9 stroke 23 44 15 16 LTA Linear DTA Digressive Optional slide on coilover kit hardware and gas fill tool are sold separately Part No B4 BOA 0000117 Part No 193000 13 14 A MELLE DIAMMA NUNON ADON NOIA OU LOND A NA ONDA LOA DaDa a EHE 1000 UE EHE T t p E FP E p E m d 4 m p E E 1 E m i i B Hn d Kl L ASB Series Designed for but is not limited to Sprint Cars Midgets Mini Sprints TQ Midgets Micro Midgets and Formula Cars Ultra lightweight 36mm aluminum body provides faster heat dissipa tion e Famous Bilstein consistency and absolute fade fre
22. lvings only Choose desired late model stock car shock from products described on pages 10 11 16 or 17 of this catalog Set up recommendations are meant to provide base line numbers only for the chassis tuning process described on page 31 29 A lt m wi 2 WI HEIDI Sw NAA 17 Orem T Li Super Late Model Asphalt MI Pro Southwest Tour Remax Etc RECOMMENDED SET UPS NOTE These recommended combinations can use Bilstein SZ SL SN ASN or BGT Series Take Apart shocks A custom valve charge will be incurred when ordering sealed SZ or SL Series shocks not listed on pages 12 and 13 of this catalog VALVING 300 100 300 100 L F R F VALVING 6010 zo RBS 5030 Banked Track VALVING 210 90 220 120 ee LRG VALVING 5030 S ars 5050 SSBB VALVING CALL TECH DEPT rope CALL TECH DEPT s VALVING CALL TECH DEPT CALL TECH DEPT 30 How to Shock Tune Your Chassis Study the current Bilstein set up recommendations for your particular type of racing These combinations are tested and proven successful but due to the many variables that come into play under racing conditions it is to your advantage to have a basic understanding of how shock damping rates affect your lap times Adjustments can then be made with reason and understanding Simply stated shock absorbers convert the kinetic energy of the spring movements into heat This heat is then dissipated into the air through the shock tu
23. n the small diameter tube PISTON and VALVING The small diameter piston develops damping forces with check valves operated by little coil springs LOWER PRESSURE CHAMBER OUTER TUBE This is a reservoir to Store oil displaced by the shaft on the compression stroke DIL RESERVOIR By storing oil in the outside tube heat dissipation is Slowed more than the monotube Shock design even if the outer tube is aluminum i O JA nets Most short track racers still run on the older style twin tube shocks But if you watch closely you ll find more of your competitors switching to the up to date monotube gas pressure shock absorbers Although there are other brands of monotube gas shocks making an appearance in America s pit areas Bilstein technology is so far ahead and so different that their performance cannot be equaled Bilstein s larger piston area produces instantaneous response to the slightest suspension movements Dead spots in a Bilstein are an impossibility Deflective disc valving in Bilstein shocks eliminate the need for check valves and tiny coil springs that cause inconsistencies in shock valving All Bilstein shocks of the same part number produce with little variation the same damping forces In other words when you bolt on a Bilstein you know what shock valving is on your car shock absorber performance fades away when the oil in the shock cavitates foams Conventional twin tube shocks that ar
24. shocks on the front and 9 stroke shocks on the rear When ordering from your Bilstein dealer be sure to ask for the appropriate stroke for each corner of your chassis 27 BILSTEIN lt Asphalt Modified NASCAR Type RECOMMENDED SET UPS NOTE These recommended combinations can use Bilstein SZ SL SN ASN or BGT Series Take Apart shocks A custom valve charge will be incurred when ordering sealed SZ or SL Series shocks not listed on pages 12 and 13 of this catalog NOTE Set Up 1 Forward Drive not an Issue Set Up 2 Forward Drive S an Issue All of the above set ups assume your chassis uses 5 stroke shocks on the front and 8 stroke shocks on the rear When ordering from your Bilstein dealer be sure to ask for the appropriate stroke for each corner of your chassis 28 _ F a j ae CE BILSTEIN Late Model Stock 3100 Ib 350 cfm Carb NASCAR Type RECOMMENDED SET UPS NOTE These recommended combinations can use Bilstein SZ SL SN ASN or BGT Series Take Apart shocks A custom valve charge will be incurred when ordering sealed SZ or SL Series shocks not listed on pages 12 and 13 of this catalog VALVING 300 100 300 100 LF IRF VALVING 6010 Eee En 5030 Banked rack VALVING 210 90 220 120 LEIRE VALVING 5030 SA FAD 5050 SSBB VALVING CALL TECH DEPT TIE CALL TECH DEPT ERRA VALVING CALL TECH DEPT CALL TECH DEPT NOTE Set ups above indicate recommended va
25. teel sealed monotube gas pressure shock e Converts to coilover applications e Plated for durability and rapid heat dissipation e Bilstein s famous consistent fade free performance e Custom valving is available for an additional fee Available in 7 and 9 strokes Model Extended Length Collapsed Length o Z 20 00 13 14 9097 23 44 14 94 Available in these standard valvings Example 7Z 3030 or 897 3030 11 E Si NEMA SL Series Designed for but is not limited to Modifieds and Late Models 46mm 1 81 diameter steel sealed monotube gas pressure shock e Linear style valving e Converts to coilover applications e Plated for durability and rapid heat dissipation e Bilstein s famous consistent fade free performance Available in 5 6 7 8 and 9 strokes Stroke Part No Extended Length Collapsed Length B46 0201 16 25 MEZO B46 0202 19 29 12 00 B46 0210 20 00 13 14 B46 0203 222o 14 00 B46 0207 23 44 14 94 Available in these standard valvings Example B46 0201H or B46 0203A A 230 78 H 300 100 B 208 72 L 180 95 C 162 55 R 180 120 D 220 120 o 230 100 E 2 0 90 U 200 180 F 175 60 Ei 12 BILSTEIN FS SN Series Designed for but is not limited to Modifieds Late Models and Sprint Cars r ELE 1 RAC 46mm 1 81 diameter steel body aluminum billet cap with schrader valve Sold in kit form less valve p
26. the compression side AK Series Front Rear Year Part Number Part Number CAMARO AK2072 AK1054 CHEVELLE MONTE CARLO BUICK REGAL 73 88 AK1043 AK1044 FULL SIZE FORD ono AK1195 AK1196 MUSTANG except SVO 87 93 AK1199 AK1198 Mounting Types Extended and Compressed Lengths T Bar to Pin T Bar to Eye Cantilever to Pin Eye to Eye BILSTEIN AK Series Specifications Part Valving Mounting Types Extended Collapsed Number Length Length All valvings at 10 sec NOTE See page 8 for mounting types o 4 Pn BILSTEING a SG Series Designed for but is not limited to Stock Cars IMCA UMP Modifieds Midgets Mini Sprints Modified Lites and Dwarf Cars 36mm 1 42 diameter steel sealed monotube gas pressure shock e Converts to coilover applications e Economy price e Lightweight e Low rod pressure e Bilstein s famous consistent fade free performance Available in 6 7 and 8 strokes Model Extended Length Collapsed Length 56G 17 00 11 00 o G 20 00 12 00 o06 21 00 13 00 Availahle in these standard valvings Example 6G 3060 or 876 5555 Built with RBT piston for strong tie down characteristics High bleed valving designed for rear 10 m BILSTEIN gt orm SZ Series ei Designed for but is not limited to Modifieds and Late Models 46mm 1 81 diameter s
27. twin tube WORKING PISTON Consists of patented deflective disc valve stack for precise performance Bilstein discs D 11111111111111111111 are spring steel which outperform stainless steel and produce longer life Piston uses powder metal technology OIL CHAMBER Special oil is pres surized by the gas area onto the divid ing piston to prevent cavitation foaming for consistent fade free performance PISTON ROD Case hardened and highly polished steel strong enough to lift 20 tons ROD GUIDE and SEALS High pres sure Viton inner rod guide seals ensure a perfect fit for consistent fade free damping and long life per formance yisteepmyEAERe ttr Aner 2 7 2 8c m m r A m f BILSTEIN There are two basic types of shock absorber used in today s short track racing the conventional twin tube reservoir shock and the monotube gas pressure shock pioneered by Bilstein AIR SPACE When the shock is mounted upside down to reduce unsprung weight air space resides over base valves making eventual shock fade a certainty BASE VALVES Allow oil to exit the inner tube when displaced by the shaft on the compression stroke and to re enter on rebound stroke GAS BAG A plastic bag containing gas under very low pressure is said to absorb cavitation This design is almost totally ineffective in preventing shock fade UPPER PRESSURE CHAMBER INSIDE TUBE Damping forces are generated i
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