I did a little more observing of the sound last night, it seems like from 1700-1900 rpm is where the sound tends to boom and drone. Downshifting to a higher rpm makes this go almost dead quiet.
Problem solved......... Drive faster!!! :biggrin:
its an undercar resonance, very hard to get rid of. I tried for years, tried every system, every trick.
I finally killed the drone, the fix is in here
Bob
its an undercar resonance, very hard to get rid of. I tried for years, tried every system, every trick.
I finally killed the drone, the fix is in here
Bob
Very good read, Bob. It has actually got me rethinking my love for loud exhaust. Seems to be more logical to quiet down the noise. Well, the read of all those posts on the subject just put it all in a different perspective, and it made sense to me. Time to "rethink" loud pipes. Thanks for the read, Bob. And very good solution to exterminating the drone.
Bruce '87 Grand National
I also read somewhere that installing a brace between the two rear framerails kills the drone, something to do with the harmonics. Haven't tried it.
I don't think there were many more quiet than my old car.