compression psi

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Topic: compression psi

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Posted: 6/19/04 12:50pm Message 1 of 3

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fxdude

Former Member

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Orange, CA - USA

Joined: 2/20/2004

Posts: 21

Vette(s): 1976 white with red leather(Firethorn) interior

Sorry for the ignorant question
what should the psi (lbs) be for a 76 l48 engine? 8:5:1

I started my baby up and the engine seems to be missing (running rough) and I want to check the compression..
the engine ran hot just the week before when the radiator blew out..

Thanks
Ken

-Kens -76 baby- Firethorn leather |IMG|http://www.collectorsfind.com/vette/KensVettesm.jpg |/IMG|

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compression psi

Posted: 6/19/04 5:59pm Message 2 of 3

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Sarge81

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WEST SENECA, NY - USA

Joined: 12/3/2001

Posts: 2379

Vette(s): 1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Ken,
First off..it's not an ingnorant question.
I don't know what the exact psi is. I would think that it would be around 150 psi or higher. But if you are going to do a compression check.
Write down all your readings, then compare each cylinder reading to one another.
If one or more cylinders is more than 15% lower than your highest reading, then you have a worry.
Good luck, Sarge

GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.

3.54 Dana 44

'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975

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