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08-31-2008, 11:02 AM
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#1 |
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TEAM Member
Join Date: Jan 2008
Posts: 279
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Head gasket
Does any one know the size of the head gasket to change my compresion ration from 10.2.1 to 10.5.1 on my svt focus
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JCMRACING#12 |
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08-31-2008, 07:42 PM
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#2 |
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[FJ] Addict
Join Date: Apr 2002
Location: On the Set of CSI: Crime Scene Investigation
Posts: 35,700
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Re: Head gasket
ummmmmmm. you could probably use the stock zetec gasket and get close.
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09-01-2008, 07:21 PM
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#3 |
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TEAM Member
Join Date: Apr 2007
Posts: 237
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Re: Head gasket
Cometic (cometicgasket.com ?) will have or can make you whatever thickness you want. As to the math...
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2007 NASA Mid-Atlantic Spec Focus Champion (Undefeated in a class of 1) 2007 Spec Focus National Championship - 4th place 2006 NASA Mid-Atlantic 944 Supercup - Champion |
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09-02-2008, 12:54 PM
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Moderator
Join Date: Nov 2002
Location: Thousand Oaks, California
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Re: Head gasket
Make sure you leave some room for error. Barometeric Pressure and Density altitude can change the reading compression tester gauge.
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NASA Spec Focus Series Director | NASA HPDE Instructor 2002 Ford Focus ZX3 Malibu Blue <23> NASA is dedicated to aspiring or accomplished Focus racers and track enthusiast. |
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09-02-2008, 03:59 PM
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#5 |
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[FJ] Addict
Join Date: Apr 2002
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Re: Head gasket
I don't recommend using anything other than an OEM/MLS gasket anyway. Cometic makes great products, no doubt, but theres been a few stories of problems with anything other than an MLS gasket on the zetec design (meaning both a standard zetec and SVT) that I'd stick with the MLS.
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09-02-2008, 04:04 PM
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#6 | |
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[FJ] Addict
Join Date: Apr 2002
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Re: Head gasket
Quote:
Volumetric measurements don't lie. The compression ratio is a measurement of how much space is above the piston at BDC vs how much is there at TDC. A compression tester only measures the PSI that is generated in the cylinder at its peak.
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09-02-2008, 05:14 PM
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Moderator
Join Date: Nov 2002
Location: Thousand Oaks, California
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Re: Head gasket
Quote:
Good point. Just be careful. The compression change is more about being able to resurfacing for trueness, not to maximize the engine compression for power. There's no tolerance for going over the maximum.
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NASA Spec Focus Series Director | NASA HPDE Instructor 2002 Ford Focus ZX3 Malibu Blue <23> NASA is dedicated to aspiring or accomplished Focus racers and track enthusiast. |
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09-03-2008, 08:01 PM
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#8 |
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TEAM Member
Join Date: Jan 2008
Posts: 279
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Re: Head gasket
thanks guys, im almost done with my car, all i need to make it spec, is suspension.
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JCMRACING#12 |
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09-04-2008, 01:35 PM
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#9 |
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Moderator
Join Date: Nov 2002
Location: Thousand Oaks, California
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Re: Head gasket
Cool. Good Job!!
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NASA Spec Focus Series Director | NASA HPDE Instructor 2002 Ford Focus ZX3 Malibu Blue <23> NASA is dedicated to aspiring or accomplished Focus racers and track enthusiast. |
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09-05-2008, 09:39 PM
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#10 |
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TEAM Member
Join Date: Jan 2008
Posts: 279
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Re: Head gasket
thanks i just got my spec stickers
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JCMRACING#12 |
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