what would the CR be with F77E GT40P heads on 91 shortblock? thanks[sm=hiya.gif]

 

go to google type in gt 40 heads cc and i think the first one pops up is out of MF that should answer your ?

 

thanks for the tip, but it didn't work.

 

while were at it, how bout CR on 86 flattops

 

anyone?

 

no info??

 

Assuming you have the factory forged pistons (TRW L2488F ) with the F77E AA GT40P heads thathave a 59.8cc (60cc) combustion chamber would give you a static compression ratio of about 9.8 to 1. The 1986 302HO also used the same piston, so the compression should be the same.

 

sorry, but the 86 does not have the same pistons as a 1991. they are flattops without any valve relief. should be a little higher cr if valves clear, just wondered what this cr would be.

 

anyone used gt40p on 86? any idea of c/r?