stroker402
1968 dart GTS convertible
I'm starting page and will be posting pics and info building my 273 commando. This engine I'm using is an original engine with 70K miles on it . Has the oem high compression pistons with a standard bore . I will be installing my closed chamber 920 heads, headers , ld340 intake and a custom grind isky T-3 solid cam that was just ordered 455 lift 260 adv duration.
I have a question as this build procedes >>>
What would be the difference in compression if I were to use the oem steel shim head gasket at 10.5:1 vs. the mr gasket 1121g Head Gasket; Flexible Graphite Core; Elastomer Coated; 4.140 in. Gasket Bore; 0.028 in. Compressed Thickness .028 thick . Since the bore of 4.14 is quite large for the 3.65 oem bore , I would loose some compression . Can anyone tell me what would be approx loss by using the 4.14 gasket bore .
I have a question as this build procedes >>>
What would be the difference in compression if I were to use the oem steel shim head gasket at 10.5:1 vs. the mr gasket 1121g Head Gasket; Flexible Graphite Core; Elastomer Coated; 4.140 in. Gasket Bore; 0.028 in. Compressed Thickness .028 thick . Since the bore of 4.14 is quite large for the 3.65 oem bore , I would loose some compression . Can anyone tell me what would be approx loss by using the 4.14 gasket bore .