canadianregal
Building from the grnd up
- Joined
- Jan 20, 2006
- Messages
- 101
I looked at the NHRA engine specs on http://www.nhra.com/tech_specs/engine/blueprints/BUI-87.rtf
They list the NA 231 at 9.5 to one ratio --both the throttle body and the carb version but the carb has 42.7 cc heads and the throttle body has 36.5 cc heads
The turbo version has 8.6 ratio with 42.7 cc heads
Wheres the different ratios coming from
would it be the thicnkness of the head gaskets--i doubt it would change from 8.6 to 9.5 though
They list the NA 231 at 9.5 to one ratio --both the throttle body and the carb version but the carb has 42.7 cc heads and the throttle body has 36.5 cc heads
The turbo version has 8.6 ratio with 42.7 cc heads
Wheres the different ratios coming from
would it be the thicnkness of the head gaskets--i doubt it would change from 8.6 to 9.5 though