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B/B BLOWN ALCOHOL DOME

Designed specifically for high boost blown alcohol drag racing. Valve reliefs accept oversized valves and are compatible with angle milled heads. Precision CNC machined ring grooves accept .017 Dykes, 1/16 second and 3/16 oil rings. Fits open chamber cylinder heads. 0.200" wall thickness Tool Steel pins included. May be used with buttons (sold separately) in place of spiro locks. Pistons will yield .020" deck clearance at listed block height.

Includes:
Pin #990-2930-20-52S (186g)
Double spiro locks (#990-042-CS)
BLOWN ALCOHOL SERIES
Std Bore: 4.250
Ring package designed for: .017 Dykes, 1/16, 3/16 Rings

Click here to see matching JE Pro Seal Head Gaskets!
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
297810 468 4.310 4.000 6.385 9.800 1.395 12.0 11.0 10.5 38.0 665 B 0.060 J890F8-4310-5


BLOWN ALCOHOL SERIES
Std Bore: 4.500
Ring package designed for: .017 Dykes, 1/16, 3/16 Rings

Click here to see matching JE Pro Seal Head Gaskets!
Part # CID Bore Stroke Rod
Lgth.
Block
Ht.
Comp.
Ht.
Head Cubic Centimeters
Compression Ratio
Dome
Vol.
Gram
Wt.
Footnote Oversize Recom.
Ring Set
296988 541 4.500 4.250 6.385 9.800 1.270 11.8 11.0 10.5 23.5 660 B STD J890F8-4500-5
297814 541 4.500 4.250 6.535 10.200 1.520 12.6 11.7 11.1 25.3 735 STD J890F8-4500-5
297815 548 4.530 4.250 6.535 10.200 1.520 12.7 11.8 11.2 25.3 740 M 0.030 J890F8-4530-5
296989 548 4.530 4.250 6.385 9.800 1.270 12.7 11.8 11.2 25.3 673 B 0.030 J890F8-4530-5
297811 509 4.500 4.000 6.385 9.800 1.395 12.0 11.0 10.5 30.9 713 B STD J890F8-4500-5
297812 516 4.530 4.000 6.385 9.800 1.395 12.0 11.0 10.5 29.7 718 B,M 0.030 J890F8-4530-5

- 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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