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Author
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Topic: 130 psi compression test....good enugh 4 boost??
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90 7up lx
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Member # 10304
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Ok so im getin evrything piced together to do my blower & h/c/i swap on my car....the other day I checked my compression and had about 130psi across all cylinders....my ? Is...is that to low for 8 lbs of boost??
Any info helps
thanx
Posts: 1266 | From: north valley | Registered: Sep 2010
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2BlueGeeTees
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Member # 4702
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posted
How many miles are on this engine? What year is it? Is it stock or modified? If it is stock it seems about in spec for an 87-95 302. Your cylinder pressure will change if you are using a head with a different sized com. chamber. If they were all pretty close to the same amount of psi I can only assume your rings are in good shape pre-boost anyhow. Just for shuts and giggles test the pressure with the new heads and see what you get
Posts: 2316 | From: Vacaville | Registered: Jul 2004
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90 7up lx
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Member # 10304
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About 90k on it, stock 89 302w. long block w bolt ons......ima b puting on the gt40p heads n reseal all the gaskets...........car runs solid as it is but no top end out of them dam e7's
Posts: 1266 | From: north valley | Registered: Sep 2010
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Greasy
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Member # 5258
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That will be fine for 8 psi, you could even go more if you wanted to.
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'93 Cobra-Coyote Powered
'03 DSG Cobra
'13 Dodge Cummins
'14 Rubicon X
Posts: 3272 | From: North Dallas | Registered: Jan 2005
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