Compression Drop for larger cc heads? - Lateral-g Forums

g356gear · #1 01-15-2009, 09:07 AM

Hey guys,
Looking at changing from a 109cc head to a 118cc head. I am currently at around 10.0:1. Any idea how much compression I would drop by going to the larger combustion chamber?

MarkM66 · #2 01-15-2009, 10:50 AM

What size engine?

g356gear · #3 01-19-2009, 07:58 PM

Quote:

Originally Posted by MarkM66

What size engine?

Chevy 454

tony byram · #4 01-20-2009, 09:11 AM

Need to know, 1. has the engine been bored, if so how much? 2. what type of pistons are you running. 3. thickness and type of head gaskets. Ballpark guess would be around 9.0-9.5. This is just a guesstamate.

MarkM66 · #5 01-21-2009, 06:31 AM

You can play around with this;

http://www.csgnetwork.com/compcalc.html