BIG BLOCK 427 APBA DOME
Designed specifically for use with APBA-approved Dart Pro-1 cylinder heads, these pistons laser engraved with the APBA logo and part number.
Includes:
Pin # 990-2930-15-51S (150g)
Double Spiro Locks (# 990-042-CS)
Double Pin Oilers
Accumulator Grooves
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BBC 427 APBA
Std Bore: 4.250
Ring package designed for: 1/16, 1/16, 3/16 Rings
For custom bore sizes between 4.250" and 4.310", order part number 302556. This part number is made-to-order and priced as a custom piston. Please contact our tech line for price & lead time.
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| Part # |
CID |
Bore |
Stroke |
Rod
Lgth. |
Block
Ht. |
Comp.
Ht. |
| Head Cubic Centimeters |
| 112cc |
118cc |
124cc |
| Compression Ratio |
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Dome
Vol. |
Gram
Wt. |
Footnote |
Oversize |
Recom.
Ring Set |
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| 302556 |
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3.766 |
6.135 |
0.000 |
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50.0 |
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M |
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| 262808 |
427 |
4.250 |
3.766 |
6.135 |
21.218 |
13.200 |
13.2 |
12.2 |
11.4 |
50.0 |
700 |
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STD |
J100F8-4250-5 |
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| 262809 |
433 |
4.280 |
3.766 |
6.135 |
21.318 |
13.300 |
13.3 |
12.4 |
11.6 |
50.0 |
685 |
M |
0.030 |
J100F8-4280-5 |
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| 265366 |
440 |
4.310 |
3.766 |
6.135 |
21.518 |
13.500 |
13.5 |
12.5 |
11.7 |
50.0 |
702 |
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0.060 |
J100F8-4310-5 |
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GM HEAD
Std Bore: 4.250
Ring packaged 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 |
| 110cc |
118cc |
124cc |
| Compression Ratio |
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Dome
Vol. |
Gram
Wt. |
Footnote |
Oversize |
Recom.
Ring Set |
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| 267207 |
433 |
4.280 |
3.766 |
6.135 |
9.780 |
1.765 |
13.3 |
12.4 |
11.6 |
50.0 |
700 |
M |
.030 |
J100F8-4280-5 |
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| 267208 |
440 |
4.310 |
3.766 |
6.135 |
9.780 |
1.765 |
13.5 |
12.5 |
11.7 |
50.0 |
685 |
M |
.060 |
J100F8-4310-5 |
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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.