So if you go .030” over to a bore of 4.150” and then to the 4.250” crank, when you use the -4 head at 91 CCs , then by my math using common numbers for deck height, head gasket volume and valve notch volume I come up with a compression of 9.39 to 1.
If you run the -8 head at 98 CCs then your at 8.88 to 1 in compression.
With that 4.250” stroke crank every 3 CC change will change the compression ratio by 1/4 point basically.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
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