JE Pistons Bbc 502 Blown Alcohol Piston Set 4.500B 4.000S 6.385R 11.0 297811
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Designed specifically forhigh boost blown alcohol dragracing. Valve reliefs acceptoversized valves and arecompatible with angle milledheads. Precision CNC machinedring grooves accept .017Dykes, 1/16, 3/16 rings.Fits most popular Open Chambercylinder heads. 0.200 wallthickness Tool Steel pinsincluded. May be usedwith buttons (sold separately)in place of spiro locks.Pistons will yield .020deck clearance at listed blockheight.
Includes:
- Double pinoilers
- Pin#990-22930-20-52S (186g)
- Double spiro locks#990-042-CS
- Accumulator Grooves
Specifications:
- Part #:J297811
- CID: 509
- Bore: 4.500
- Stroke: 4.000
- RodLength: 6.385
- BlockHeight: 9.800
- Compression Height: 1.395
- Compression Ratio with110cc chamber volume: 12.0
- Compression Ratiowith 118cc chamber volume:11.0
- CompressionRatio with 124cc chambervolume: 10.5
- DomeVolume: 30.9cc
- GramWeight: 713
- Footnote:Oil Rail Support is Included
- Oversize: STD
- Recommended Ring Set(Check Proseal listing todetermine oil ring tension):J890F8-4500-5
With over 60 years ofexperience, JE Pistons is theleader in high performanceforged pistons. We've built areputation that thecompetition can only follow.JE has a history ofmanufacturing the highestquality pistons andcomponents that professionalengine builders, race teams,and high performanceenthusiasts trust and relyon.
The top enginebuilders in NASCAR, ALMS,NHRA, AMA Supercross andothers choose JE Pistons overany other brand. For over 60years, JE's position at theforefront of performancepiston manufacturing has beena result of continuousresearch and development ofunique materials, pistondesigns and technologies.Utilising State-Of-The-Art CNCmachines for manufacturingalong with purpose-designedforgings, JE is able tomaintain exactingspecifications on each andevery piston and holdtolerances to millionths of aninch. Also available from JEis industry-leading processeslike Ultra Crown, a DigitalThree Dimensional piston crownmachining process and FiniteElement Analysis (FEA). FEA isa computer process wherebystress and fatigue are testedon a computer model before itgoes into production. JE isthe only performance pistonmanufacturer to earn theQS-9000 quality standard whichconfirms that JE providescustomers the higheststandards in quality control.In addition, we also haveState-Of-The-Art inspectionequipment and testingequipment which enables us toconstantly bring you, thecustomer, the very latest inpiston designconfigurations.