http://www.camaross.com/forums/showt...=460364&page=3



I have posted some info about HV pumps.
This is about all the wining about the issues of said pump and what it does and doesn't do.
Scroll down to the Loooong posts at the bottom of page three and page four.

 

Maybe we can finally put to death the "HV pumps suck the sump dry" theory. Then again some people will still think that...

 

Yea.
Most of what is posted is hearsay or incorrect about this issue.

 

Except it's not a theory. It would be a fact.

Rich

 

You swear HV is such a good thing yet I don't remeber you siting any examples of the stock system being insufficient.

I am aware of more oiling failures on HV equipped LT1s than I am with stock oiling LT1s.
For the pumping the pan dry thing I seems to me the one thing they had in common was sustained high rpm cornering which hindered normal drainback where same day same track stock oiling cars had no issue and obviously stock oiling cars make up the majority and many of us beat on them pretty hard.

 

Where's your proof?

 

In a very large pile of very expensive parts.

Rich

 

 

Why should we trust that over the quote from Melling's MARKETTING department ?

 

The Melling article is actually a bit weak in the "logic" department. Their main driving force for increased oil flow it the fact the a stock pump is designed to support only 4,500rpm, and when the RPM goes up in a performance engine, the oil demand goes up - suggesting that for some reason, the stock pump can't meet that demand.

But by their own admission, as RPM goes up, the pump flow goes up. Ergo.... if the stock pump can meet the demands of the engine at elevated RPM, why do you need a HV pump? My stock pump easilly supports the demands of my engine at 7,400rpm.

They kind of trip over themselves in the whole writeup

 

I didn't read the article, but if you are talking about how HV pumps will suck a stock pan dry, it will, trust me. It happened the the engine i built, under WOT the oil presure would drop to zero, thats not good at 6grand. I pulled the pan and put a stock pump on it, the pressure is the same as the HV, but it never drops. Thats all the proof I need. cause I didn't believe it either. I do now.

 

You know what? I would have been skeptical too until I saw it. Why some people here choose to believe theory over hard data, obtained quite expensively, totally escapes me.

Rich

 

This might get good!

 

For what it's worth, Chad Golen recommends a HV oil pump with his LT engines.

http://www.cardomain.com/ride/2189634

 

The issue isn't HV oil pumps, it's HV oil pumps with a stock 4th gen pan.

Rich