View Single Post
Old 08-28-2018, 11:57 AM   #17
jamal
Scooby Guru
 
Member#: 71875
Join Date: Oct 2004
Location: Montana
Default

Manley uses 51cc head volume to calculate their CR:

http://www.manleyperformance.com/sc/..._pistons.shtml

With 56cc sti heads and those pistons and a 75mm stroke I get 7.9:1. 79mm I get 8.3.

Using the high compression 9.8:1 pistons destroked I get 9.0:1.
* Registered users of the site do not see these ads.
jamal is offline   Reply With Quote