shavin the head

407 Views 9 Replies 7 Participants Last post by 946speed, Oct 16, 2006

946speed

Discussion Starter · Oct 7, 2006

Hey, any one with thoughts/ experience with milling a stock head on a 600? I was thinking .010". Engine has 125 PSI on each cylinder right now, .010" should keep me below the 150 range?

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946speed

Discussion Starter · #2 · Oct 7, 2006

Come on , has any one milled a stock head. Any cc??

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DAN03REV

· #3 · Oct 8, 2006 (Edited by Moderator)

946speed said:
Come on , has any one milled a stock head. Any cc??

pm BIG JOHN http://www.dootalk.com/forums/index.php?showuser=2193 ... he has the experience you need to answer your questions....

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dantrin2000

· #4 · Oct 8, 2006

946speed said:
Hey, any one with thoughts/ experience with milling a stock head on a 600? I was thinking .010". Engine has 125 PSI on each cylinder right now, .010" should keep me below the 150 range?

I Cut my 02 600 .015" with a .022" base gasket and went from 135 to 145. You should be safe with .010". You could go more and put in a thicker base gasket. Depends on what you are trying to gain.

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snoeproe

· #5 · Oct 8, 2006

any motor with over 150 psi compression will require high octane race fuel to prevent detonation.

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MogulmashinMxz

· #6 · Oct 15, 2006 (Edited by Moderator)

snoeproe said:
any motor with over 150 psi compression will require high octane race fuel to prevent detonation.

I have a head with .040 cut off and the squish recut on a otherwise stock motor I have 150 pounds of compression in each side. and yes I have run 110 with this head

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Skidoo-guy

· #7 · Oct 15, 2006

I'm looking at shaving my heads aswell whats the most you can go and still run on 91 octane pump gas aswell what size gasket would i need any info is appreciated

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Skidoo-guy

· #8 · Oct 16, 2006 (Edited by Moderator)

dantrin2000 said:
Hey, any one with thoughts/ experience with milling a stock head on a 600? I was thinking .010". Engine has 125 PSI on each cylinder right now, .010" should keep me below the 150 range?

I Cut my 02 600 .015" with a .022" base gasket and went from 135 to 145. You should be safe with .010". You could go more and put in a thicker base gasket. Depends on what you are trying to gain.
[/quote]
what kind of gains did you get dantrin when you cut your headsthe gasket you are talking about is it the gasket that goes between the cylinders and the block or the head and the cylinders.

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zx 800

· #9 · Oct 16, 2006

946speed said:
Hey, any one with thoughts/ experience with milling a stock head on a 600? I was thinking .010". Engine has 125 PSI on each cylinder right now, .010" should keep me below the 150 range?

Before cutting a head I would check your squish first. Another trick that people have done is put in a thicker base gasket in to alter the port timing and cut the head back to specs

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946speed

Discussion Starter · #10 · Oct 16, 2006

946speed said:
Hey, any one with thoughts/ experience with milling a stock head on a 600? I was thinking .010". Engine has 125 PSI on each cylinder right now, .010" should keep me below the 150 range?

Thanks for the info everyone. I am just looking for a little more performance. every little bit counts. I ride off trail quite a bit, as well as some very long lakes. I dont mind using 91oct gass. The little 600 takes a pounding so every bit of extra power helps..

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