SBC P/ACT PISTON -4.8cc 4.020 bore, 3.562 STRK, 6.000 ROD,

Description

Engineered for Extreme Duty Alcohol and Nitrous applications, these pistons are perfect for drag race, ASCS and Sprint Car engines. Valve pockets are designed to work with Pro Action/Pro Topline 23°, Brodix 11X and angle milled cylinder heads and a 2.750″ pin provides added stability to absorb heavy loading. Offered in .005″ and .010″ overbore to accommodate new aftermarket cylinder blocks. Ring grooves are machined for 1/16, 1/16, 3/16 rings.

Includes
:
Pin #927-2750-15-51S (130g)

Accumulator groove

Double Spiro Locks #927-042-CS
Double pin oilers

Specifications
:
Part #: J217790
CID: 361

Bore: 4.020
Stroke: 3.562
Rod Length: 6.000
Block Height: 9.011
Compression Height: 1.230
Compression Ratio with 58cc chamber volume: 11.3
Compression Ratio with 64cc chamber volume: 10.5
Compression Ratio with 72cc chamber volume: 9.6

Dome Volume: -4.8cc

Gram Weight: 438
Footnote: Made To Order

Oversize: .020
Recommended Ring Set (Check Proseal listing to determine oil ring tension): J10008-4020-5
With over 60 years of experience, JE Pistons is the leader in high performance forged pistons. We’ve built a reputation that the competition can only follow. JE has a history of manufacturing the highest quality pistons and components that professional engine builders, race teams, and high performance enthusiasts trust and rely on.
The top engine builders in NASCAR, ALMS, NHRA, AMA Supercross and others choose JE Pistons over any other brand. For over 60 years, JE’s position at the forefront of performance piston manufacturing has been a result of continuous research and development of unique materials, piston designs and technologies. tilising State-Of-The-Art CNC machines for manufacturing along with purpose-designed forgings, JE is able to maintain exacting specifications on each and every piston and hold tolerances to millionths of an inch. Also available from JE is industry-leading processes like Ultra Crown, a Digital Three Dimensional piston crown machining process and Finite Element Analysis (FEA). FEA is a computer process whereby stress and fatigue are tested on a computer model before it goes into production. JE is the only performance piston manufacturer to earn the QS-9000 quality standard which confirms that JE provides customers the highest standards in quality control. In addition, we also have State-Of-The-Art inspection equipment and testing equipment which enables us to constantly bring you, the customer, the very latest in piston design configurations.
NOTE: All clearance item sales are final & are not returnable for credit or refund, descriptions are correct as per manufacture