Author
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Topic: Need to figure something out.
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Pure Stang
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Member # 7251
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posted
I want to figure out what my comp ratio is going to be. the pistons are 9.5-1 with a 64cc head and my heads are 58cc's. how would i got about figuring this out? or if somone knows this off the top of thier head feel free to let me know.
-------------------- HEART BREAKER
R.I.P Willie Guzman (5ltrsvt) you will be missed brother. 04/24/87 - 11/23/2012
90 lx 347 RIP 86 gt 89 lx- next project
Posts: 6497 | From: San Jose | Registered: Nov 2006
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svfreerider87
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Member # 5748
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posted
Turbo50 dan, this post needs your attention! haha he sent me a calculator that had everything I can't find it, but dan if you read this post it up!
-------------------- Dreamspeed Motorsports
Posts: 1685 | From: Sunnyvale | Registered: Jun 2005
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Pure Stang
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Member # 7251
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posted
yes post it up . where my gear heads at
-------------------- HEART BREAKER
R.I.P Willie Guzman (5ltrsvt) you will be missed brother. 04/24/87 - 11/23/2012
90 lx 347 RIP 86 gt 89 lx- next project
Posts: 6497 | From: San Jose | Registered: Nov 2006
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JohnB
Tech Moderator
Member # 969
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posted
Is it zero-deck? What is the thickness of your head gasket?
-------------------- 1965 Shelby Cobra 1993 Cobra 2012 F150 Raptor 2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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Pure Stang
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Member # 7251
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posted
i have no idea about the deck. the thickness if the gasket is .039.
-------------------- HEART BREAKER
R.I.P Willie Guzman (5ltrsvt) you will be missed brother. 04/24/87 - 11/23/2012
90 lx 347 RIP 86 gt 89 lx- next project
Posts: 6497 | From: San Jose | Registered: Nov 2006
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90gtvert
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Member # 8697
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posted
Assuming they are flat top pistons with a 64CC head volume and 9.5:1 compression, also assuming they are not zero decked (0.016 below deck)
With a 58CC cylinder chamber volume wth .039 head gasket
.021 Head Gasket ~10.4:1 for 302ci ~10.5:1 for 306ci
.039 Head Gasket ~9.88 for 302 ~10.0 for 306
Mike
Edited for new Head Gasket ... sorry [ January 27, 2009, 02:39 PM: Message edited by: 90gtvert ]
-------------------- 90 GT Vert 93 GT
http://www.110octanephotography.com
Posts: 1889 | From: Bay Area | Registered: Oct 2008
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Pure Stang
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Member # 7251
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posted
sent pm
-------------------- HEART BREAKER
R.I.P Willie Guzman (5ltrsvt) you will be missed brother. 04/24/87 - 11/23/2012
90 lx 347 RIP 86 gt 89 lx- next project
Posts: 6497 | From: San Jose | Registered: Nov 2006
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