I was talking to an old time stock car and race boat mechanic and driver who told me this. (He's been at this for over 40 years)

He says that the 2.8, when pushed to 7,000+ rpm (he had a carbed unit) will starve for oil in the heads. He says that the answer, if you really want to push the motor when turboing, without blowing it up, is to install the big block Chevy oil pump.

He tells me the big block pump will bolt right in to the 2.8 and your oil pressure will jump up considerably with no lube problems no matter what rpm's you run.

Has anybody tried this and is this guy right about the interchangability of the 2.8 oil pump with the big block pumps?

Arn

Well I can't answer the BBC interchangability question, But I have heard the stock 2.8L oil pumps did lack some at higher RPM's. The 3.4L pumps are about the same, But the oil galleys are better so it doesn't starve as bad. I used the GM Performance oil pump from PAW. It is a high volume/high pressure pump designed to maintain good pressure for the 2.8L. Many of the S-10 guys use it because they are 4-wheeling and the oil gets sloshed a lot more. On my car, cold is about 75psi and hot is 40 psi. It never gets below about 35psi.
Melling makes an oil pump that is suppose to be equal to the GM Performance unit from what I have heard.

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Happiness isn't around the corner...
Happiness IS the corner.

[This message has been edited by Oreif (edited 01-22-2004).]

Not suppose but does!
Melling High Volume Oil Pump
Oil Pump - High Volume M95HV
Oil Pump Screen 95S3
Now add the V6/60 deg. Windage Tray and no more oil stravation problems.