A change in compression from 8.5 to 9.5 would provide some 7 more hp to a motor already making 350 hp, but if the car/ motor was set up with Cam of too much overlap or light in the CID dept or in need of more rear gear, then that 1 point change in the compression ratio would provide a bunch more drivability .
On a street motor with iron heads it just does not pay with today's fuel or what maybe tomorrow's fuel to go for that extra 1.7 hp by going for even just a compression of 10 to 1 no less the factory falicy of these motors have a comp of 10.75!
A stock 4.120" Bore RAIII motor with the 66 CC version of the casting number 48 heads along with a Fel pro 1016 gasket and a .021" deck clearance only had a true compression of 10.3 just for a reference point here.
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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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