high speed vibration

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Mar 23, 2004 | 08:08 AM

vbdig

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high speed vibration

I just purchased a 392 stroker motor from Ford Racing. It came with flywheel and vibration damper. It has terrible vibration above 4500 rpm. A resonant vibration, not a engine miss. I know that the flywheel is supposed to be balanced, I did remove it to install a backing plate for the bellhousing, can the flywheel go on wrong? I believe the bolts are in a pattern that does not allow this but something is very wrong. I have driven it for 300 miles, and I just noticed that I have very low oil pressure now. I think I may have screwed up.

Mar 23, 2004 | 07:25 PM

fordeverpower

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From: iowa

call them up and them them of the problem!

Mar 24, 2004 | 09:19 AM

beartracks

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From: Albuquerque

Sounds like something wrong on the mains or rod bearings. I wouldn't drive it untill I was sure. You might throw a rod and have even bigger problems

Mar 24, 2004 | 10:46 AM

vbdig

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I found it, the pilot bearing pushed into the crank leaving no support for the input shaft and no centering for the clutch. Ruined crank and bearings. Pretty dumb
Thanks