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3" exhaust too much? & turbo noise
Posted by George D (more from George D) on Thu, 2 Nov 2000 14:33:16
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I have a '99 9-3 LPT running at 1.1 bar. I've found a really good deal on a 3" turbo-back exhaust (http://www.speedparts.o.se), but I'm thinking maybe this is excessive and could in some way or another actually be worse than a 2.5" with just a 3" downpipe. I've been reading lots of stuff on the net saying that too large a diameter is not good.
Also, I am running modest boost levels so I don't know if 3" is actually necessary.
How exactly does the exhaust help? Does it help spoolup and prevent boost drop-off significantly?
How about turbo noise -I hope it also increases that too ..that jet-engine thing is really kick-ass.
BTW, I have noticed many Audi S3's and TT's making really loud spoolup noises. Why is this, and -once again- what can I do to increase mine? Only suggestion so far has been by Dean for airbox mods.
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