oil pumps

qflash · 08-07-2022, 05:52 PM

I've been told to run a standard volume oil pump in my stocker. How much does a high volume oil pump or a high pressure oil pump rob from engine horsepower?
Thanks,
Ron miller

Painter · 08-07-2022, 06:14 PM

Sometimes you just need to listen and not question why.

Larry Hill · 08-07-2022, 07:55 PM

That question is best answered on the dyno

Dyno · 08-07-2022, 10:02 PM

Better safe than sorry. More expensive engines ruined by to little than just enough or to much.

Henrys Toy · 08-08-2022, 08:47 AM

Quote:

Originally Posted by qflash

I've been told to run a standard volume oil pump in my stocker. How much does a high volume oil pump or a high pressure oil pump rob from engine horsepower?
Thanks,
Ron miller

Good morning to all,
I guess it depends on the manufacture of engine, RPM, oil pan depth, and internal oil clearance's.

Respectfully,
Henry Kunz 1534 H/SA

Signman · 08-08-2022, 09:54 AM

What Henry said. ^^^

If you have a well built SBC the stock small block oil pump is more than enough actually a little too much. The pump was designed for worst case scenario road driving by those who would do no maintenance and abuse the engine. The 5 quart fill requirement is actually a quart or more the engine really requires.

The power robbing point in the oil pump is the bypass not being large enough. This is explained in David Vizard's book on hot rodding a small block chevy. This is also mentioed in Grumpy Jenkins book on building his small block pro stock engine. Doing what is described will help if you don't want to go with the Schuman Pump and the hours a fabrication to get the full benefit.

Mods which help reduce HP loss in the oil system are not bolt on require hours hand fabrication most will not pay for or do themselves if they have the skills.
Having 50 lbs of oil pressure at idle and 80 lbs + down track may be self assuring but all you need 20-3- at idle and 40-50 down track to be good.

Be Well!
Work hard the results are fun!

427FE · 08-08-2022, 11:01 AM

Been recently told for every 10 psi reduction , 6 hp.

Rick J · 08-08-2022, 12:18 PM

Quote:

Originally Posted by 427FE

Been recently told for every 10 psi reduction , 6 hp.

I've seen about half of that.

RJ Sledge · 08-08-2022, 12:23 PM

FE's are strange animals.
A lot of variables to consider.....
Good Luck

RJ

Signman · 08-09-2022, 10:18 AM

Keep in mind the load on the cam changes when the bypass opens and closes plus the extra load on the gears caused by the restriction. There's HP loss there plus add the effect on valve and ignition timing varying. Consider the slop in the chain affecting ignition timing it all adds up to HP you're leaving on the table.

Be Well & Work Hard it's Fun!

08-07-2022, 05:52 PM	#1
qflash Junior Member Join Date: Apr 2013 Location: Raised in PA, Live in San Angelo, TX Posts: 68 Likes: 0 Liked 0 Times in 0 Posts	oil pumps I've been told to run a standard volume oil pump in my stocker. How much does a high volume oil pump or a high pressure oil pump rob from engine horsepower? Thanks, Ron miller

08-07-2022, 06:14 PM	#2
Painter Member Join Date: Dec 2012 Posts: 227 Likes: 4 Liked 162 Times in 45 Posts	Re: oil pumps Sometimes you just need to listen and not question why.

08-07-2022, 07:55 PM	#3
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,633 Likes: 1,928 Liked 10,687 Times in 2,225 Posts	Re: oil pumps That question is best answered on the dyno __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817 Last edited by Larry Hill; 08-07-2022 at 08:49 PM.

08-07-2022, 10:02 PM	#4
Dyno Senior Member Join Date: Dec 2002 Posts: 916 Likes: 1,135 Liked 684 Times in 204 Posts	Re: oil pumps Better safe than sorry. More expensive engines ruined by to little than just enough or to much.

08-08-2022, 09:54 AM	#6
Signman Senior Member Join Date: Oct 2003 Location: Lower Slower Delaware Posts: 535 Likes: 22 Liked 269 Times in 99 Posts	Re: oil pumps What Henry said. ^^^ If you have a well built SBC the stock small block oil pump is more than enough actually a little too much. The pump was designed for worst case scenario road driving by those who would do no maintenance and abuse the engine. The 5 quart fill requirement is actually a quart or more the engine really requires. The power robbing point in the oil pump is the bypass not being large enough. This is explained in David Vizard's book on hot rodding a small block chevy. This is also mentioed in Grumpy Jenkins book on building his small block pro stock engine. Doing what is described will help if you don't want to go with the Schuman Pump and the hours a fabrication to get the full benefit. Mods which help reduce HP loss in the oil system are not bolt on require hours hand fabrication most will not pay for or do themselves if they have the skills. Having 50 lbs of oil pressure at idle and 80 lbs + down track may be self assuring but all you need 20-3- at idle and 40-50 down track to be good. Be Well! Work hard the results are fun! __________________ Frank Ferrucci I/SA 1271 "Be Thankful for the Gifts You are Given"

08-08-2022, 11:01 AM	#7
427FE Member Join Date: Sep 2016 Location: Monroe Twsp, NJ Posts: 192 Likes: 260 Liked 348 Times in 79 Posts	Re: oil pumps Been recently told for every 10 psi reduction , 6 hp.

08-08-2022, 12:23 PM	#9
RJ Sledge Senior Member Join Date: Jun 2007 Posts: 783 Likes: 498 Liked 288 Times in 90 Posts	Re: oil pumps FE's are strange animals. A lot of variables to consider..... Good Luck RJ

08-09-2022, 10:18 AM	#10
Signman Senior Member Join Date: Oct 2003 Location: Lower Slower Delaware Posts: 535 Likes: 22 Liked 269 Times in 99 Posts	Re: oil pumps Keep in mind the load on the cam changes when the bypass opens and closes plus the extra load on the gears caused by the restriction. There's HP loss there plus add the effect on valve and ignition timing varying. Consider the slop in the chain affecting ignition timing it all adds up to HP you're leaving on the table. Be Well & Work Hard it's Fun! __________________ Frank Ferrucci I/SA 1271 "Be Thankful for the Gifts You are Given"