Quote:
Originally Posted by HWYSTR455
That's been done, several times. I even looked up there to see if the flexplate bolts were too long, I at one point suspected they may be, too long that is, and contacting the block.
Was even wondering if there was some casting flash at the top of the trans bell that might be making contact, since I'm trying to focus on things that were not present on the dyno.
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Very good then. Don't mean to be bringing things back up that have been checked and verified. We are thinking along the same lines though. "What is different here in VA, that has changed from AZ on the engine dyno where the engine was quiet?" That's the big puzzler here.
Staying with the logic path above, and not hearing the engine in person. Any chance in hell on earth that something is broken apart in a muffler clanging around with the exhaust pulses and traveling up the pipes through the manifolds and to the engine? It's a crazy long shot but next time the engine is running, have someone listen right at the mufflers for any weird clanging noise. If you think there is any possibility of a noise transfer, get a packing blanket and wrap it around the muffler (s) to deaden them. See if the noise changes. Of course don't do this too long and catch the blankets on fire!