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427/428 "FE" INVERTED DOME

Specially designed for the latest aftermarket blocks and heads, these pistons are for use with the 427 or the 428 crank and aftermarket 4.250" crank with aftermarket 6.700" rod. The factory block should be sonic checked for 4.280" and 4.310" bores. These pistons use 1/16, 1/16, 3/16 rings. The compression ratios are figured for 10.150 block height. Larger bore sizes available as customs, call JE for details.

Includes:
Pin #975-2930-16-51S (154g)
Pin #990-2930-15-51S (150g) Footnote E
Double spiro locks (#990-042-CS)
Note: 162116 & 162117 Designed to work with OEM and aftermarket connecting rods. 242930, 242931, & 242932 designed for aftermarket connecting rod only.
427 INVERTED DOME
Std Bore: 4.233
Ring package designed for: 1/16, 1/16, 3/16 Rings
Note: 162116 & 162117 Designed to work with OEM and aftermarket connecting rods. 242930, 242931, & 242932 designed for aftermarket connecting rod only.

Tech and Installation Tips
Valve Relief Diagram
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
72cc 74cc 88cc
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
242930 482 4.250 4.250 6.700 10.150 1.325 10.2 10.1 9.0 -25.0 531 E 0.017 J100F8-4250-5
242931 489 4.280 4.250 6.700 10.150 1.325 10.3 10.2 9.1 -25.0 521 E 0.047 J100F8-4280-5
242932 496 4.310 4.250 6.700 10.150 1.325 10.4 10.3 9.2 -25.0 531 M,E 0.077 J100F8-4310-5
162117 451 4.250 3.980 6.490 10.150 1.670 10.4 10.2 9.1 -16.0 598 P,W 0.017 J10008-4250-5
162116 429 4.250 3.780 6.490 10.150 1.770 10.4 10.2 9.0 -11.0 612 P 0.017 J10008-4250-5

- Denotes part # has been issued a new part #. A list referencing old part #s to their new counterparts will be available shortly.


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