shimming and porting oil pump

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May 22, 2006 | 05:16 PM

SFengineer

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Racer

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From: Alameda Ca

shimming and porting oil pump

Does anyone know a link for how to port and shim an LS1 oil pump? I hear people talking about this all the time, but never seen instructions for how to do it. Please help!

May 22, 2006 | 05:41 PM

Phil97SVT

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From: Southern Maryland Maryland

You drop the plug and add a .100 spacer.

May 22, 2006 | 08:39 PM

RED99

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From: Vancouver WA

Quote:

Originally Posted by SFengineer

Does anyone know a link for how to port and shim an LS1 oil pump? I hear people talking about this all the time, but never seen instructions for how to do it. Please help!

May 22, 2006 | 09:01 PM

PrayN4C5

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From: CA

You have a PM SFengineer, i need your help

May 23, 2006 | 03:31 PM

SFVetteman

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From: San Francisco CA

Frankly, with the availabillity of the Melling oil pump for LS motors, I wouldn't bother. The Melling pump offers 15% more volume and 10 PSI more pressure right out of the box compared to a stock pump. If that's not enough then you can have it ported.

May 23, 2006 | 07:14 PM

RED99

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From: Vancouver WA

I'm putting in a LS4 pump which is suppose to have 30% more volume of flow. But if there is any other tricks, then why not why I have it on the bench.
What is it that they are porting? Where the pick up tube goes in? And I don't understand the shim? A .100"

May 23, 2006 | 08:56 PM

MikeV

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From: Lake Havasu City AZ

The shim just adds spring preload to the relief to raise the oil pressure...

Mike V

May 23, 2006 | 09:31 PM

RED99

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From: Vancouver WA

Then do people shim the Z06 pumps, or just the LS1's pumps! The reason I asked is because I read somewhere that the only difference between the LS1 and the LS6 pumps is the pressure relief spring.