Item: JE Pistons, BBC 632, Bore 4.600, Stroke 4.750, Rod Length 6.660, Flat Top -7.3cc, 582 Grams, Set
JE Pistons specifically designed for Nitrous-fed 632 engines using aluminum rods. Valve reliefs fit the following cylinder heads: 12º Raptor, 12º Pro-Filer, Dart Big Chief 14º (program #’s 3815 & 384), Sonny Tru-Pro 14.5º, and Brodix PB1200. Precision CNC machined ring grooves are designed for .043 back-cut top rings, .043 D-wall 2nd rings, and 3/16 oil rings. Compression distance and compression ratio calculated with -.025? deck clearance at listed block height.
Includes:
Pin #990-2930-18-51S (174g) Double spiro locks (#990-042-CS) Rail Supports(# 4600-203) Contact reduction grooves Double Forced Pin Oilers Accumulator Grooves Vertical gas ports for maximum top ring sealCompression Ratio:
65cc 15.2:1 70cc 14.5:1 77cc 13.6:1Photo is for illustration purposes only
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