Compression Ratio Question.......
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Compression Ratio Question.......
Ok, last annoying question as to my build.......
The stock CR was 10.25:1. The only thing I changed was the gasket. I went from .050 to .040. What is my CR now.
I know that there are CR calculators out there. I don't have all the info such as deck height, which would be stock, and piston volume, again, stock.....
Any help would be appreciated. Anyone think I picked up 1/4 point? 1/2?
The stock CR was 10.25:1. The only thing I changed was the gasket. I went from .050 to .040. What is my CR now.
I know that there are CR calculators out there. I don't have all the info such as deck height, which would be stock, and piston volume, again, stock.....
Any help would be appreciated. Anyone think I picked up 1/4 point? 1/2?
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
I don't know but it wouldn't be much. Can you use one of those calculators to model a baseline that is close, and then just change the gasket variable? That should give you some idea. My guess maybe .25:1
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
I left the chamber size and such the same, just manipulated the deck clearance and piston volume until I hit 10.25, or close enough to it. Then I changed the gasket.
I don't think that's all that accurate.
Burning Brakes
Joined: Nov 2003
Posts: 1,011
Likes: 1
From: Marietta Pa
St. Jude Donor '10-'11-'12-'13-'14
What gasket?
Becuase its not just the compressed thickness...but also the bore.
I know my 1010 gaskets are .039 thickness...but also 4.166 bore. Stockers are something like .051 compressed with a 4.06 bore.
That bore will also affect volume for the calculators
Becuase its not just the compressed thickness...but also the bore.
I know my 1010 gaskets are .039 thickness...but also 4.166 bore. Stockers are something like .051 compressed with a 4.06 bore.
That bore will also affect volume for the calculators
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
I used an online calculator and just minipulated some of the numbers and came up with 10.5.
I left the chamber size and such the same, just manipulated the deck clearance and piston volume until I hit 10.25, or close enough to it. Then I changed the gasket.
I don't think that's all that accurate.
I left the chamber size and such the same, just manipulated the deck clearance and piston volume until I hit 10.25, or close enough to it. Then I changed the gasket.
I don't think that's all that accurate.
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Felpro 1010s. So maybe there's no gain, which is cool. I just didn't want to lose anything.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
http://www.corvetteactioncenter.com/...0/90specs.html
i wonder why it has more compression but the same torque and hp from the previous year ??????????
http://www.corvetteactioncenter.com/...9/89specs.html
i wonder why it has more compression but the same torque and hp from the previous year ??????????
http://www.corvetteactioncenter.com/...9/89specs.html
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
http://www.corvetteactioncenter.com/...0/90specs.html
i wonder why it has more compression but the same torque and hp from the previous year ??????????
http://www.corvetteactioncenter.com/...9/89specs.html
i wonder why it has more compression but the same torque and hp from the previous year ??????????
http://www.corvetteactioncenter.com/...9/89specs.html