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Raising compression with a head gasket?

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Old 12-13-2010, 04:50 AM
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Default Raising compression with a head gasket?
I've been thinking about doing the spoon head gasket to raise engine compression

Would this reduce the piston / valve clearance?
I'm revving the f20c to 9300+ with a stock head + AP2 intake retainers

What other ways are there of raising engine compression?
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Old 12-13-2010, 05:49 AM
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Yes, the valves are coming closer to the pistons. But the intake cams will be a bit retarded because the cam sprocket is in the head. This could help to increase the clearance again. Don't know how both effects add together.
Best way to raise C/R are new pistons with higher decks.
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Old 12-13-2010, 02:56 PM
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Originally Posted by bpaspi,Dec 13 2010, 06:49 AM
Yes, the valves are coming closer to the pistons. But the intake cams will be a bit retarded because the cam sprocket is in the head. This could help to increase the clearance again. Don't know how both effects add together.
Best way to raise C/R are new pistons with higher decks.
hmm sounds like it could be more trouble than its worth I wish I could find some help from spoon on this.. a before and after dyno would be nice too
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Old 12-13-2010, 04:03 PM
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Going this route I would be concern with stock rod stretch vs quench area, you might start hammering the head with your piston...
Cheers
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Old 12-13-2010, 04:57 PM
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you will be fine and it will run fine. keep in mind your only bumping up the c/r .5 same as putting flat face valves.
how much power are you looking for??
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Old 12-13-2010, 05:38 PM
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Cam timing will be off, so you'd need adjustable cam gears to compensate. You would also have less P2V clearance.
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Old 12-14-2010, 12:55 AM
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CamGears.
https://www.s2ki.com/forums/index.php?showt...post&p=14420601
Scroll down to the cam gear section.
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Old 12-14-2010, 04:22 AM
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Originally Posted by Fierc3,Dec 14 2010, 01:55 AM
CamGears.
https://www.s2ki.com/forums/index.php?showt...post&p=14420601
Scroll down to the cam gear section.
I wouldn't be able to do the cam gears or cams.. I'm building the car around the Nasa TT rules. I can bump the compression up to .5 for free
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Old 12-14-2010, 09:22 AM
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Well for what its worth, i ran the Spoon gasket on my 2.2 Motors. i reved them to 9k. No issues with hitting pistons, jus snapping rods from the RPMs. Lesson learned :/
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Old 12-14-2010, 02:44 PM
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What do you think about running flat supertech valves and a spoon headgasket?
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