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Old 02-27-2012, 10:37 PM   #1
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Default Very interesting read..

In regards to choosing your size exhaust with a turbo application.

http://www.tercelreference.com/terce...st_theory.html
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Old 02-27-2012, 10:43 PM   #2
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Good ole JKav
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Old 02-28-2012, 01:57 AM   #3
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Actually awesome read!
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Old 03-01-2012, 09:53 AM   #4
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Interesting.

I think I’m going to build 3.5” downpipe after all
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Old 03-01-2012, 10:08 AM   #5
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Quote:
Originally Posted by muoto View Post
Interesting.

I think Im going to build 3.5 downpipe after all
You read the paragraph about velocities and scavenging effect right?
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Old 03-01-2012, 10:23 AM   #6
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Quote:
Originally Posted by Braineack View Post
You read the paragraph about velocities and scavenging effect right?
Yes I did. And that would interest me if I'm building N/A Miata
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Old 03-01-2012, 11:18 AM   #7
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Quote:
Originally Posted by muoto View Post
Interesting.

I think I’m going to build 3.5” downpipe after all
Yes you should build 3.5" everything.

I have also posted this article before.


http://www.modified.com/tech/modp-11...ech/index.html

You need to disable ad blocker to view that site. Good article.

In short, in testing a 3" vs 3.5" exhaust they found 10% power gains @ 500hp.

Gains would probably be less at 250hp but there would probably still be gains.

Last edited by Faeflora; 03-01-2012 at 11:38 AM.
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Old 03-01-2012, 11:20 AM   #8
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Quote:
Originally Posted by muoto View Post
Yes I did. And that would interest me if I'm building N/A Miata
It should interest you more with a turbo setup. Less backpressure is always a goal. But so should be less turbulence aft turbine and maintaining the pressure differential.

If I were doing a 3.5" DP, I'd want a 4" exhaust.
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