427/428 "FE" DOME
Specially designed for OEM blocks and heads, these pistons are for use with the 427 or the 428 crank. Designed with a minor +.017" overbore for cast iron blocks, these pistons use a 4.250" ring set with 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)
Double spiro locks (#990-042-CS)
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427 DOME SERIES
Std Bore: 4.233
Ring package designed for: 1/16, 1/16, 3/16 Rings
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| Part # |
CID |
Bore |
Stroke |
Rod
Lgth. |
Block
Ht. |
Comp.
Ht. |
| Head Cubic Centimeters |
| 72cc |
74cc |
88cc |
| Compression Ratio |
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Dome
Vol. |
Gram
Wt. |
Footnote |
Oversize |
Recom.
Ring Set |
 |
| 168741 |
451 |
4.250 |
3.980 |
6.490 |
10.150 |
1.670 |
12.5 |
12.2 |
10.5 |
2.5 |
569 |
M,P,W |
0.017 |
J10008-4250-5 |
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| 168742 |
429 |
4.250 |
3.780 |
6.490 |
10.150 |
1.770 |
12.5 |
12.2 |
10.5 |
6.0 |
594 |
M,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.