Compression Ratio Question.......
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
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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
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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
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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
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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
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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.
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Thread Starter
Team Owner
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From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Le Mans Master
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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
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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