enkeivette
Well-known member
- Joined
- Mar 30, 2008
- Messages
- 990
I have 74 cc heads,
5cc valve reliefs in my flat top pistons,
a 4.03 SBC bore,
a 3.75 stroke,
my HG is .061 compressed,
with a 4.2 bore.
I got 9:1 with an online calculator.
5cc valve reliefs in my flat top pistons,
a 4.03 SBC bore,
a 3.75 stroke,
my HG is .061 compressed,
with a 4.2 bore.
I got 9:1 with an online calculator.