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#1
01-05-2005, 05:13 PM
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compression on 305cid
what should my cylinder compression be on my 1990 1/2 ton with a 305tbi.I guess what i am asking is what should it be from fresh new engine so that i can compare.thanks much.
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#2
01-06-2005, 08:21 AM
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Re: compression on 305cid
150 lbs is around normal for a good stock engine. All cylinders should be really close to same pressure. Under 100, somethings probably not right. Over 200 and you got a RV cam or something. Block throttle wide open and give it four or five hits to check.
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