High Volume Oil Pump
Thread Starter
Registered User
Joined: Sep 2008
Posts: 87
From: Baltimore,MD
High Volume Oil Pump
Im rebuilding my entire lt1 pretty much because when I bought it, it had so many miles on it and one of the things Ive bought was a High Volum Oil Pump, I heard some about I should of gotten that because now its going to flow to much and Im going to get spun bearings and its going to eat all my oil, I have no idea, what do you think?
Registered User
Joined: Feb 2004
Posts: 1,309
From: Oshkosh, Wisconsin
There have been many debates on what to run. Some say it will suck the pan dry.... I have rebuilt using both a standard volume and high volume with no problems.I really don't have an opinion on which is better.
Registered User
Joined: Sep 2004
Posts: 1,872
From: Lantana, TX
No experience with them personally but several informed people have said it will suck a stock pan dry. I think I remember something about them chewing up oil pump drive gears too, but you should definitely search.
Registered User
Joined: Feb 2007
Posts: 236
From: College Station, Texas
I went with a GMPP standard volume high pressure pump and haven't looked back. It's using the stock pan slightly clearanced for the 383 and I have around 70-80psi cold idle and it falls to around 30-40psi hot idle. The slightest blip of the throttle will send it back into 60-70psi territory when hot and a bit more than that at WOT. I highly recommend this pump to you...
Banned
Joined: Oct 2006
Posts: 4,970
From: Goochland, Va.
a stock one is fine, I don't even use the high pressure spring. Collapse a filter real easy....I'm speaking about street cars.
I used a high volume pump on a race engine with a 8 1/4" pan.....I plan to swap it out for a stock one blueprinted. I have heard they can rob up to 15 h.p.
I used a high volume pump on a race engine with a 8 1/4" pan.....I plan to swap it out for a stock one blueprinted. I have heard they can rob up to 15 h.p.
Registered User
Joined: Dec 1969
Posts: 27,727
From: Little Rock, AR
I used to recommend the stock pump, but with Melling (GM's supplier) changing to a less robust casting at the request of GM, I recommend the Melling Select series that has the older, thicker casting. Melling does not even recommend their thinner casting for racing applications that tend to use solid motor mounts. The thinner casting can crack.
Registered User
Joined: Feb 2007
Posts: 236
From: College Station, Texas
I used to recommend the stock pump, but with Melling (GM's supplier) changing to a less robust casting at the request of GM, I recommend the Melling Select series that has the older, thicker casting. Melling does not even recommend their thinner casting for racing applications that tend to use solid motor mounts. The thinner casting can crack.
Registered User
Joined: Feb 2004
Posts: 1,309
From: Oshkosh, Wisconsin
I used to recommend the stock pump, but with Melling (GM's supplier) changing to a less robust casting at the request of GM, I recommend the Melling Select series that has the older, thicker casting. Melling does not even recommend their thinner casting for racing applications that tend to use solid motor mounts. The thinner casting can crack.
I had a HV pump and swapped it for a melling select. With the pump came a small piece of paper stating what you had just said about the solid mounts. I was alittle surprised when I saw the casting of the select pump because there was very little difference between the 2. They look almost identical especially around the stud mount/ base. This was on a HV pump, though.
Registered User
Joined: Dec 1969
Posts: 27,727
From: Little Rock, AR
Is this only for the standard volume pumps?
I had a HV pump and swapped it for a melling select. With the pump came a small piece of paper stating what you had just said about the solid mounts. I was alittle surprised when I saw the casting of the select pump because there was very little difference between the 2. They look almost identical especially around the stud mount/ base. This was on a HV pump, though.
I had a HV pump and swapped it for a melling select. With the pump came a small piece of paper stating what you had just said about the solid mounts. I was alittle surprised when I saw the casting of the select pump because there was very little difference between the 2. They look almost identical especially around the stud mount/ base. This was on a HV pump, though.