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compression check??

Posted By: blacknight On: 08-27-2008 @ 09:23:44         Reply | Edit
what is a good reading for a compression check on a engine??

what is a good, ok, and bad reading??

I have a 78 firebird with a 305 chevy

thank you

-Bob

Posted By: fast82Z On: 08-28-2008 @ 22:10:30     Reply | Top | Edit
I'd say 155-165psi should be what it reads unless it has a performance cam.
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1982 Z28, 383, D-1SC intercooled @ 15psi, trick flow heads, solid roller cam, 3.73's, th400,
4500 stall, trans. brake, fuel injection, 9.94@137, 1.52 60' with 3700lbs. AIM:CHATV400


Posted By: 76formula On: 09-03-2008 @ 00:13:57     Reply | Top | Edit


My Caps Lock Button Is Broken

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76 formula yellow/black ramair hood 400 poncho punched.030 street/strip built m38 trans conveted rear end to a 4wdb 3.23posi

Posted By: 76formula On: 09-03-2008 @ 00:15:30     Reply | Top | Edit
anything more than 10% from highest to lowest signals a problem too
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76 formula yellow/black ramair hood 400 poncho punched.030 street/strip built m38 trans conveted rear end to a 4wdb 3.23posi

Posted By: blacknight On: 09-03-2008 @ 16:11:15     Reply | Top | Edit
thanks for your help

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