What will my compression ration be?
Thread Starter
Melting Slicks
Joined: May 2007
Posts: 3,246
Likes: 4
From: Bay Area CA
What will my compression ration be?
Compression RATIO, that is :o
100% stock '73 L48 short block, not rebuilt, 64cc heads, .028 compressed thickenss head gasket, or .038 Compressed thickness gasket. I need to run on 91 ron unleaded.
100% stock '73 L48 short block, not rebuilt, 64cc heads, .028 compressed thickenss head gasket, or .038 Compressed thickness gasket. I need to run on 91 ron unleaded.
Last edited by RunningMan373; Jun 24, 2009 at 03:54 AM.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Diy
Suggest anyone planning or building should learn how to calculate scr for themselves ... learn it then practice it.
http://www.21cgt.com/FMWebCatalog/frmConversion4.aspx
One does have to learn what to plug in & how to manipulate that for some other factors/variables which also must be learned.
Stock L48 has lower scr than most folks think it has.
I see barely 9:1 with 0.028" ... but ...
if using iron heads suggest felpro 1094 shim 0.015" gaskets ... then less than 9.4:1.
http://www.21cgt.com/FMWebCatalog/frmConversion4.aspx
One does have to learn what to plug in & how to manipulate that for some other factors/variables which also must be learned.
Stock L48 has lower scr than most folks think it has.
I see barely 9:1 with 0.028" ... but ...
if using iron heads suggest felpro 1094 shim 0.015" gaskets ... then less than 9.4:1.
Drifting
Joined: Dec 2007
Posts: 1,309
Likes: 24
From: Coastal Georgia
C2 of the Year Finalist - Modified 2020
Runningman, you're using aluminum heads as well, which would allow you a little more compression ratio on pump gas. You won't need to be concerned, though...your combo won't make more than 9.5:1 to one withe either gasket.
