oil pump shimming

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Nov 18, 2008 | 02:54 PM

redemn93

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oil pump shimming

well, i am about to do an oil pump in my car and while reading up on different posts, i saw where some guys are shimming them. i tried doing a search but couldnt quite find what i was looking for. how do i know if i need to shim, how much i would need to shim and where exactly do they get shimmed at? on the pressure side or relief side? i am looking at ls6 pumps. not sure if i am going ported or not. depends what i find. thanks for the info!!

Nov 18, 2008 | 03:03 PM

conan

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Are you talking about shimming it to pump more oil or shimming it to clear a double roller timing chain?

Nov 18, 2008 | 07:03 PM

redemn93

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more oil. i am getting a TSP ported ls6 pump.

Nov 19, 2008 | 12:04 AM

conan

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I have a ported ls6 pump from TSP and i make 60 psi at cold idle, 50psi at hot idle, and 80 psi at WOT. I don't think you will need do any thing to that pump.

Nov 19, 2008 | 07:55 AM

redemn93

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sounds good to me. thanks for the info. i guess its a trial and error type thing to get the pressure you want? how much pressure is too much?

Dec 3, 2008 | 08:58 AM

redemn93

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i have my TSP ported 1s6 pump in. 60 psi cold idle. 38-39 hot idle and 60-65 WOT. i am guessing its lower because i have a stock thermostat? once i get a 160 stat i am guessing it will go up?

Dec 3, 2008 | 09:02 AM

conan

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Quote:

Originally Posted by redemn93

i have my TSP ported 1s6 pump in. 60 psi cold idle. 38-39 hot idle and 60-65 WOT. i am guessing its lower because i have a stock thermostat? once i get a 160 stat i am guessing it will go up?

How many miles are on your engine? The tighter the bearing clearance the more oil pressure you will make. The #'s I gave you were on a brand new engine. So 60-65 psi at hot WOT on a 98 is doing good if you ask me.