Join Date: May 2005
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From what little I understand (which isn't much most of the time) I think I can open up some thought on flutter and why you don't hear it on your 95. Think back to when you've seen a kid talking into a fan. Now think of the way your bosses SD sounded. Kind of the same, wasn't it. IMO all flutter is on a SD is the air being "chopped up" by the turbo. The "chopping" action makes a flutter type sound.
The reason most of us w/ the OBS truck can't hear it might be b/c of a few reasons. Either the cat is still functioning properly and the flutter is blocked by the cat gut, OR the stock EBPV is still in place and causes turbulence in the exhaust flow, thus canceling any flutter we might otherwise be able to hear.
I know that ever since I put on a 3" DP and made my exhaust a little more free flowing I can hear a faint flutter if I'm taking off & the exhaust pipe is facing a wall. It's not much, but I can hear it. Now if I ever gut the EBPV it should flutter all the time.
Sounds logical to me anyway.