Oil pump selection - Team Camaro Tech
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post #1 of 10 (permalink) Old Jan 21st, 10, 08:30 AM Thread Starter
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Oil pump selection

What would the reasons be to use either a high volume or high pressure oil pump? Most of what I have read on the subject tells me to stick with the standard vol/press pump for a mild street engine, but I am curious what the other types would be used for. Any advice on setting up the pickup location, and is the stock one adequate?
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post #2 of 10 (permalink) Old Jan 21st, 10, 09:05 AM
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Re: Oil pump selection

Lots of different opinions to this one..one reason is ,modified engines need more pressure(volume) to send the oil where it needs to go or when you rev your engine higher and faster(than a stock engine) you need the oil to get where its gotta go fast..(to keep up with the moving parts)..this is a generic answer to your question!!

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post #3 of 10 (permalink) Old Jan 21st, 10, 12:16 PM
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Re: Oil pump selection

I was wondering the same thing.
They make standard volume high pressure
And high volume standard pressure
What's the difference with those, and what is better, i would assume standard volume and higher pressure, but why does everyone run high volume standard pressure?
To answer your question, unless it's a off trailer, race, back on trailer car, you NEED standard volume/standard pressure. High volume pumps SUCK from what I have seen, and especially heard. You shouldn't have any delivery or pressure problems if you use the correct oil, and your motor was built withing spec.
My stock GM pump gets 15-20psi @ 900 rpm idle when hot, and keeps up under wide open throttle, all the way up to 7k, it's hard to tell the reading when your watching the road and tach, but i'd say it peaks around 60-65. 10w30 oil here.

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post #4 of 10 (permalink) Old Jan 21st, 10, 12:22 PM
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Wink Re: Oil pump selection

Use of pump depends on use of engine

here's a recent post - https://www.camaros.net/forums/showthread.php?t=172293

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post #5 of 10 (permalink) Old Jan 21st, 10, 01:42 PM
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Re: Oil pump selection

I ran a HV pump with no problems. Next build I ran a standard volume high pressure (z-28) pump. THey both have about 80 lbs. at start up. Hot idle is about 25 and hot @2500 RPMs is 65.

I have had problems with the high pressure pump pumping too much oil up to the top of the engine and pretty much pumping it dry.

My next build will have a standard pressure/standard volume pump.

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post #6 of 10 (permalink) Old Jan 21st, 10, 04:17 PM Thread Starter
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Re: Oil pump selection

[QUOTE=Vintage 68;1365266]Use of pump depends on use of engine

OK - can you break down different engine uses, and what pump would be best, & why?
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post #7 of 10 (permalink) Old Jan 22nd, 10, 04:09 PM
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Re: Oil pump selection

I will use a hi volume pump when i open the bearing clearance or if i drill another hole in cam bearings and clock them at 5 & 7.or if i drill the front plugs to oil the timming chain or if i groove the lifter bores for a flat tappet cam. thats a lot of extra leaks. Hi pressure when i want to run alot of rpm because the rod gets oil from the mains at the increased speed the opening has less time to supply the rod. BTW the rod oil pressure is mainly from centrifugal force anyway you just have to get it there.
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post #8 of 10 (permalink) Old Jan 22nd, 10, 04:47 PM
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post #9 of 10 (permalink) Old Jan 22nd, 10, 05:31 PM
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Re: Oil pump selection

So basically you need a high pressure pump if your motor is set up to be pretty loose.
I really don't see the use in a high volume or pressure, 10% sure, but I don't care what they say, high vol. WILL drain the pan, yes, it's because the oil doesn't get back fast enough, but if you had a standard volume in the first place, it wouldn't do that.
My friend with a poncho had a hv pump in his pontiac motor, out it came 3 times, for pan starvation, they did everything they could to increase the oil drain back, said **** it and ran the stock pump.

I wonder what reher-morrison or shafiroff use in their motors, I've been around both, and on the gauge at almost 2k rpm (idle) they only read about 20 psi...

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post #10 of 10 (permalink) Old Jan 23rd, 10, 08:33 PM Thread Starter
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Re: Oil pump selection

Quote:
Originally Posted by ssdoug View Post
I will use a hi volume pump when i open the bearing clearance or if i drill another hole in cam bearings and clock them at 5 & 7.or if i drill the front plugs to oil the timming chain or if i groove the lifter bores for a flat tappet cam. thats a lot of extra leaks. Hi pressure when i want to run alot of rpm because the rod gets oil from the mains at the increased speed the opening has less time to supply the rod. BTW the rod oil pressure is mainly from centrifugal force anyway you just have to get it there.
OK. Keep in mind that I'm a novice, so I have a lot of questions..........What is the purpose for opening bearing clearance? Is that something you do for a race engine? Isn't that hard on the bearings? And can you explain the idea behind drilling holes in the cam bearings?

My motor is gonna be street & occasional Friday nite track use, so I am pretty convinced that a standard pump is the way to go.
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