Quote:
Originally Posted by Erik_H
I have no experience in diagnosing noises, so I hope someone can figure this out. From inside the car it sounds like halfway between a flutter and a rattle. The video I took with my phone with the window open makes it sound a lot more like a rattle but that's not as bad as it sounds in real life. The sound does not happen at idle or cruise, but only on acceleration. At first I thought it might be an exhaust leak, and then I started to get worried about a valvetrain problem or worse detonation. Like I said, I really don't know the difference between those sounds so I'm at a loss. Anyway, here's the video - please let me know what you think.
Sorry - having problems uploading the video.
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What engine and heads do you have? What is the compression?
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73 firebird 455 6x-4 heads 350 turbo 3.73 gears
1/8 7.65 @ 90.95
1/4 11.96 @ 112.60
new best in 1/8th 7.57@91 mph(4-13-12)