What CR w/58cc heads?
Thread Starter
Supreme Member
Joined: Nov 2001
Posts: 1,526
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From: Cleveland, OH
Car: '87 Camaro LT
Engine: 355 L98
Transmission: T56
What CR w/58cc heads?
If I go from 64cc to 58cc heads what would that make the compression ratio? Assume starting CR of 9 or 9.3:1.
Senior Member
Joined: Jul 1999
Posts: 900
Likes: 1
From: Haslett, MI
Car: 1984 Trans Am WS6
Engine: Minirammed 385, 396 RWHP
Transmission: T56
Axle/Gears: 3.73 Moser 12-bolt
You cannot make that assumption, unless we know more.
1) What size engine in cubic inches?
2) Any overbore?
3) What are the reliefs in the piston rated at?
4) How far down in the hole are the pistons at TDC?
5) What size thickness is the head gasket that you will use?
Once we know these figures, we can calculate the change in compression ratio.
1) What size engine in cubic inches?
2) Any overbore?
3) What are the reliefs in the piston rated at?
4) How far down in the hole are the pistons at TDC?
5) What size thickness is the head gasket that you will use?
Once we know these figures, we can calculate the change in compression ratio.
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