Compression Ratio
Thread Starter
Melting Slicks
Joined: Apr 2002
Posts: 2,337
Likes: 14
From: Norfolk VA
Compression Ratio
Can someone calculate the static compression ratio of my engine? Here is some info on my engine.
350ci +.060.
L-82 style forged pistons +.060
Deck Height: 0.00
Edelbrock RPM aluminum heads
Combustion Chamber Volume: 64cc
Not sure of the piston volume from the bottom to the top of the cylinder.
I'm thinking my static is 10.00:1 or more due to the increased bore of the cylinders and the 64cc heads. I don't know how to use the calculators on the websites. I would appreciate if someone would do so. Thanks in advance.
350ci +.060.
L-82 style forged pistons +.060
Deck Height: 0.00
Edelbrock RPM aluminum heads
Combustion Chamber Volume: 64cc
Not sure of the piston volume from the bottom to the top of the cylinder.
I'm thinking my static is 10.00:1 or more due to the increased bore of the cylinders and the 64cc heads. I don't know how to use the calculators on the websites. I would appreciate if someone would do so. Thanks in advance.
Le Mans Master
Joined: Apr 2005
Posts: 6,347
Likes: 418
From: Seattle Area WA
To have zero deck height you would have had to had the block decked, is that really what you have. Typically a stock deck height is .025", that is the top of the piston is .025" below the deck. Also what head gasket are you using? What is the piston P/N, are they the direct L-82 flat top replacements?
Thread Starter
Melting Slicks
Joined: Apr 2002
Posts: 2,337
Likes: 14
From: Norfolk VA
To have zero deck height you would have had to had the block decked, is that really what you have. Typically a stock deck height is .025", that is the top of the piston is .025" below the deck. Also what head gasket are you using? What is the piston P/N, are they the direct L-82 flat top replacements?
Last edited by Oldguard 7; Sep 18, 2008 at 03:49 PM.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
My TRW-FM-SP book says L2417F60 = 1.560" cd, -3.4cc dv
add ABOUT 1.7cc to volume for chamfer & land
assume stock uncut deck ~ 9.025" and typical comp gasket ~ 9cc ... scr ABOUT 9.85:1
You might as well call it ten to one
TRW-SP-FederalMogul scr calculator:
http://www.21cgt.com/FMWebCatalog/frmConversion4.aspx
add ABOUT 1.7cc to volume for chamfer & land
assume stock uncut deck ~ 9.025" and typical comp gasket ~ 9cc ... scr ABOUT 9.85:1
You might as well call it ten to one
TRW-SP-FederalMogul scr calculator:
http://www.21cgt.com/FMWebCatalog/frmConversion4.aspx
