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.
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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.
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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Tech and Installation Tips
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Valve Relief Diagram
- Denotes part # has been issued a new part #. A list referencing old part #s to their new counterparts will be available shortly.