Exhaust size
02-19-2005, 07:26 PM
#1
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Exhaust size
To all of you chipped 10vt guys, are any of you running a 3"? I was thinking about going with a 3" on the Coupe when the time comes, but am unsure if that's too big of a diameter.
02-20-2005, 11:41 AM
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In all of the comparisons I have seen.....
Very little difference in flow between 3" and 2 1/2". 2 1/2 can be a lot easier to fit. After a lot of comparison, I put 2 1/2 on my minivan (same displacement, higher pressure than most Audis) and have no complaints. If you are building your own, which I did, 3" has gotten easier. A lot of diesel pickups use it, so the pre formed mandrel bends aren't too hard to find.
02-21-2005, 02:26 PM
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I'm trying to accomodate for the future...
...when I do Megasquirt. That won't be for at least a couple years. Turbo motors don't necessarily need backpressure like NA motors, do they? My main concern would be going too big for now, and hurting my performance.
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02-22-2005, 12:24 PM
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Effort, cost-effectiveness - backyard tests
When considering the amount of effort or expense, it should be remembered that a 15% increase in flow does not necessarily translate to a 15% increase in power. You have to "need" the flow before it provides extremely beneficial results. I cannot do the conversion, nor provide a factor. But, it should be obvious that once an optimal size is reached further increases have only incremental results. On the other hand, if there is plenty of room for a 3", I don't know why not. But, please, don't put a "fart pipe" on it.
http://www.gusmahon.org/html/mufflers.htm<ul><li><a href="http://www.gusmahon.org/html/cooler%20test.htm">http://www.gusmahon.org/html/cooler%20test.htm</a</li></ul>
http://www.gusmahon.org/html/mufflers.htm<ul><li><a href="http://www.gusmahon.org/html/cooler%20test.htm">http://www.gusmahon.org/html/cooler%20test.htm</a</li></ul>
02-22-2005, 05:42 PM
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Heh, I've got a little more taste than that...
...it's just going to be raw pipe coming out the back. No tip, no nothing. Not angled, but a straight 90 degrees. I saw a WRX STi like that once, and I liked the look. It was clean and understated. Kinda 'sleeper' as well as being aggressive if you know what to look for.