Quote:
Originally Posted by cdnus
It would be interesting to find out if this "flutter" is associated to engine displacement & muffler size. Do the members with big displacements encounter this noise (427+) ?
Is it only smaller (408-) that encounter it?
When I had the original VERY restrictive mufflers I did not have any "flutter" but as soon as I installed the S/S 2.5" mufflers I started getting it.
It's almost as if the flow capacity of the muffler is too much for the engine @ lower RPMS & you get a "sucking effect" that causes the fluttering.
I suspect that if I installed 2.5" turnouts the problem would go away--would look rediculous but might solve the problem. (not going to happen)
Not being a engineer & not knowing anything about expansion-contraction-heating-cooling-velocity of exhaust gasses this is my best shot at the problem.
I am sure that someone here is & can answer with a more accurate solution/cause/effect.
Craig
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I have it now with a 600hp 482" s/o and 3" Classic Chambered exhaust.. I didn't have it before with the other 3" CC exhaust. The other set flowed as much as this set.. I'm not really complaining as I've grown used to it and others outside the car don't seem to hear it.