08-10-2005, 12:09 AM
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#1 |
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Guest
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I just compression check my JDM 7MGTE motor and got 150-160 psi for all 6 cylinders. My repair manual says that stock compression should be 142 psi per cylinder. I have stock internals and a Greddy 1.5mm head gasket and have not had the block of head milled. What could be causing such a high compression check, not that I'm complaining.
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08-10-2005, 04:11 AM
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#2 |
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12psi boost
Join Date: Jul 2005
Posts: 348
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Seems to be the norm for having a metal head gasket by what I've seen on these forums. As long as you don't detonate...
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08-10-2005, 04:52 PM
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#3 |
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Guest
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What seems to be the norm, the metal head gasket or the high compression from having a metal head gasket. Every one that has a 7M know you need a metal head gasket.
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08-12-2005, 02:59 AM
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#4 |
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12psi boost
Join Date: Jul 2005
Posts: 348
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The increased pressure with a MHG SEEMS to be the norm. Did you have a valve job done or anything while the head was off? Valve can decrease the size of the combustion chamber bumping up compressions too
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08-14-2005, 12:56 AM
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#5 |
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Guest
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No no valve job, stock internal motor.
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08-15-2005, 10:27 AM
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#6 |
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7M POWAH! ;)
Join Date: Jun 2004
Location: New Zealand
Posts: 2,312
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stock compression is 142psi or more
no more of a variance than 14psi per barrel so as long as they're even ya good 
__________________
Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first! |
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