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Old 03-05-08, 04:29 PM   #37 (permalink)
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speed220mph
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Join Date: Feb 2003
Location: North Carolina
GT40: ERA GT
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Re: 302 failure - any opinions???

Quote:
Originally Posted by Julian West View Post
Just a thought, the oil I was using was Mobil 15W-50 fully synthetic.... would this be related??

Regds,
Julian: Don't think the type of oil you were using had anything to do with it, but more the lack of oil. You mentioned over revving, but that would have more impact--pardon the pun--on the valves. You didn't mention whether you were cornering when this occurred. But if you were hard in a turn, could be the oil moved away from the pickup for an instant, which could be enough to starve the oiling system long enough to cause a pressure drop at the rod bearing. That's why I over-fill with oil before rolling out on the track.

This is problem plagued us in the early TransAm days. The Boss engines had plenty of power, but at high rpm and cornering g caused oil starvation because were required to use wet-sump systems. The result was frequently the same failure as your engine experienced.

A cure short of going wet sump is to install an Accusump. Coated bearings are another insurance policy. My $0.02 worth.

I hope my ramblings help.

Tom
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