Compression ratio calculation
Thread Starter
Joined: Nov 2004
Posts: 309
Likes: 0
From: Metro Detroit
Compression ratio calculation I'm in the process of piecing together parts for a Texas speed 408 and trying to figure out my CR. I once ran across a great thread that had all the information (head gasket bore, deck height etc...) I needed to calculate but can't find it now. I know the bore and stroke is 4x4 and my 241 chamber volume is 66.67cc. any help would be great.
Thanks
http://www.gtsparkplugs.com/CompRatioCalc.html
Thanks
http://www.gtsparkplugs.com/CompRatioCalc.html
A lot of that depends on the specs of the 408 being built. Stock LS1 has -.006" deck height, 3.910" bore gasket, .054" gasket thickness, etc. What gaskets are you using? GM MLS? Cometic?
Did they deck the block? Most aftermarket builds have the pistons out of the hole -.010" when assembled.
Did they deck the block? Most aftermarket builds have the pistons out of the hole -.010" when assembled.
Thread Starter
Joined: Nov 2004
Posts: 309
Likes: 0
From: Metro Detroit
https://ls1tech.com/forums/generatio...xcel-file.html
I can't seem to get the Excel sheet to open...
Thread Starter
Joined: Nov 2004
Posts: 309
Likes: 0
From: Metro Detroit
A lot of that depends on the specs of the 408 being built. Stock LS1 has -.006" deck height, 3.910" bore gasket, .054" gasket thickness, etc. What gaskets are you using? GM MLS? Cometic?
Did they deck the block? Most aftermarket builds have the pistons out of the hole -.010" when assembled.
Did they deck the block? Most aftermarket builds have the pistons out of the hole -.010" when assembled.
Thanks, I think I found the link. Would this be it?
https://ls1tech.com/forums/generatio...xcel-file.html
I can't seem to get the Excel sheet to open...
https://ls1tech.com/forums/generatio...xcel-file.html
I can't seem to get the Excel sheet to open...
Trending Topics
This is the calculator I generally use:
http://www.csgnetwork.com/compcalc.html
A 408 stroker iron block will have a bore of 4.030" and a stroke of 4.000". Head gasket thickness if you use GM MLS gaskets is .051" and diameter will probably be 4.060". The deck height (piston out of the hole) for a stock LS engine is usually about -.006". You'll need the piston volume and combustion chamber size too.
http://www.csgnetwork.com/compcalc.html
A 408 stroker iron block will have a bore of 4.030" and a stroke of 4.000". Head gasket thickness if you use GM MLS gaskets is .051" and diameter will probably be 4.060". The deck height (piston out of the hole) for a stock LS engine is usually about -.006". You'll need the piston volume and combustion chamber size too.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
