bearing clearences?

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May 25, 2009 | 01:20 PM

Burning Rubber

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From: edgewater, maryland

bearing clearences?

I am building an LT1 with heads and cam and I was wondering what other people are running in terms of rod bearing clearence on their LT1s? Right now it is at .0018. I heard for a motor that will be driven hard .0025 to .0035 is better. I am kinda stuck and don't know if I should buy undersize bearings or just leave it alone.

May 25, 2009 | 03:43 PM

fergymoto

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From: Rock Hill, SC

I always shoot for .002-.0025 on the mains and the rods and run straight 30wt oil.

May 25, 2009 | 07:33 PM

My95Z

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From: Maryland

I have never, and would never build an engine that was going to be driven hard with bearing clearances under .002", but thats just me. Unless you are sure your oiling system, rod bolts, and bearings are up to the task.

May 25, 2009 | 07:40 PM

wrd1972

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From: Central Kentucky

Quote:

Originally Posted by fergymoto

I always shoot for .002-.0025 on the mains and the rods and run straight 30wt oil.

What he said/\

Error on the side of more loose than more tight.

May 25, 2009 | 07:53 PM

mdacton

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From: Goochland, Va.

I run mine at .003 main and rod.

Been using the same bearing for maybe 200 passes or more at 8k.

10w-30 oil

May 25, 2009 | 08:40 PM