What is my compression Ratio?
Thread Starter
Supreme Member
iTrader: (15)
Joined: Oct 2003
Posts: 3,449
Likes: 5
From: Charlestown, IN
Car: 1971 Camaro
Engine: 427
Transmission: TKO600
Axle/Gears: 3.73
What is my compression Ratio?
1988 350 L98 stock shortblock. Had stock cast iron heads milled .020" . Using a felpro preflattened head gasket with a thickness of .015" Which adds 3.2cc to the chamber. What is my compression ratio? The chambers on the heads have not been touched.
Thread Starter
Supreme Member
iTrader: (15)
Joined: Oct 2003
Posts: 3,449
Likes: 5
From: Charlestown, IN
Car: 1971 Camaro
Engine: 427
Transmission: TKO600
Axle/Gears: 3.73
Stock is 9.3:1 right? Anyonw know the thickness of the stock head gasket? I would think it is thicker than the .015" one I am using now. How much would .020" milling of the head increase it?
Supreme Member
iTrader: (3)
Joined: Sep 2003
Posts: 6,859
Likes: 14
From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
I'am running Brodix street heads on my GTA. Brodix says that for every .006" flat milled you loose 1 CC for the steet heads. It has been my understanding that for every 1CC you gain or loose .1 in compression in our L98 350CI engines. Not sure if this can be directly applied to your situation but will give you an idea. Allen
Thread
Thread Starter
Forum
Replies
Last Post
Damon
Tech / General Engine
8
Sep 26, 2015 04:29 PM
83 Crossfire TA
Suspension and Chassis
0
Sep 8, 2015 12:06 PM