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Author Topic:   high volume oil pump
dode
Dirt Freak

Total posts: 417
posted July 09, 2002 03:02 PM UIN: 13209501
should we change out a standard oil pump for a high volume pump, or will the standard one be fine? We are running an 8 qt pan and running between 5000 and 5500 in a sbc. thanks.

John

dirtbuster
Dirt Freak

Total posts: 353
posted July 09, 2002 06:11 PM
As long as you keep bearing clearances in check you should be fine with a standard pump and a good quality oil. Plus it will not have as much drag and maybe give you a few extra hp.

We run a good standard volume pump and turn it 7000-7400 regularly and have had no problems. Runs about 25-30 psi at hot idle and 60-65 psi hot running with Mobil 1 15w50 oil.

We tear the motor down every 25 nights and go through it with new bearings and rings etc. Like I said make sure you keep your clearances in check.


AIRFLOWDESIGN
Dirt Roller

Total posts: 9
posted July 20, 2002 01:27 PM
John, the standard oil pump will work but take it apart and check the clearances. It should be .0025 to .003 however most of the time it’s .006 to .007 plus. Now if its out of spec get yourself a flat surface plate like 1’inch glass plate or steel plate that’s been ground flat. Than tape a piece of Emery 400 to start 600 finish to the flat surface. Run the oil pump body, gears cover over the paper in a figure eight with a little Trans oil. Then reverse the figure eight now and then till you get the right clearance you want. Thanks, Ron Melville www.airflowdesign.com

dode
Dirt Freak

Total posts: 417
posted July 22, 2002 02:15 PM UIN: 13209501
exactly what would I check the clearance on? thanks.

John

AIRFLOWDESIGN
Dirt Roller

Total posts: 9
posted July 22, 2002 10:39 PM
The cover and the two gears. If you need help just give me a call 323-222-5787
Ron Melville www.airflowdesign.com

quote:
Originally posted by dode:
exactly what would I check the clearance on? thanks.

John



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