Compression Ratio w/ 70cc AFRs - ?
12-19-2006, 12:10 PM
#1
Racer
Thread Starter
Compression Ratio w/ 70cc AFRs - ?
What is the formula for calculating the compression ratio with the larger CC heads?
I hope this allows for more boost.
I hope this allows for more boost.
12-19-2006, 01:15 PM
#2
http://www.race-cars.net/calculators...alculator.html
Stock heads are 64cc I'm pretty sure, so those heads will lower compression all other things left untouched.
Stock heads are 64cc I'm pretty sure, so those heads will lower compression all other things left untouched.
12-19-2006, 11:49 PM
#4
Racer
Thread Starter
I found some web sites that do the calculations for you.
70cc 10.17:1
72cc 9.95:1
76cc 9.53:1
It seems that bumping the cc is a good way to lower compression and allow for more boost.
70cc 10.17:1
72cc 9.95:1
76cc 9.53:1
It seems that bumping the cc is a good way to lower compression and allow for more boost.
12-20-2006, 08:30 AM
#5
as you can see your dropping about one tenth of a point for each cc you increase. the stock ls6 head is 65 cc. everything else the same, gasket etc you should be right around 10.4
