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Author Topic:   high volume oil pump
dode
Member
posted July 09, 2002 03:02 PM
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
Member
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
Member
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 itís .006 to .007 plus. Now if its out of spec get yourself a flat surface plate like 1íinch glass plate or steel plate thatís 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
Member
posted July 22, 2002 02:15 PM
exactly what would I check the clearance on? thanks.

John

AIRFLOWDESIGN
Member
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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