Clearances

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Mar 4, 2010 | 09:16 AM

edge04

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Clearances

I asked this in the Forced Induction section but thought this might be a better place.

I am starting the rebuild on my LS2, completely disassembled. This car will be a weekend/fun driver, prob never see the track time.

It has a Maggie 112 SC on it that I am looking for 9 lbs of boost

What would be the reccomended bearing clearances I should run. I heard something like

1.2 - 1.5 Main
2 - 2.2 Crank

I would think with those I would need to run a thicker oil?

Also, is running a GM high volume oil pump suggested? Also heard the stock one can be shimmed?

Mar 4, 2010 | 12:28 PM

Hotrod406

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From: Hamilton, MI

Quote:

Originally Posted by edge04

Those are the same clearances I've seen. I don't think you need a thicker oil for that. There are lots of threads about oil pumps. I'm using a Melling that lots of other people are using. It works fine at 7k on my car.

Mar 5, 2010 | 12:59 AM

kelp

On The Tree

Joined: Aug 2006

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From: SW Virginia

Quote:

Originally Posted by edge04

What would be the reccomended bearing clearances I should run. I heard something like

1.2 - 1.5 Main
2 - 2.2 Crank

I would think with those I would need to run a thicker oil?

Also, is running a GM high volume oil pump suggested? Also heard the stock one can be shimmed?

1. no thicker oil
2. with Ti rods mains .0027 rods .0026
3. get the highest output pump and shim it, I ported mine.
4. Sleeve your block

Most run closer bearing tolerances, talk to your machinist, this is just right for me.

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