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Supercharger vs Turbocharger vs NA? Hondata vs Megasquirt? 94oct vs 87oct? Through technical discussion, let's find out what will the best option for you...
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10-18-2008, 12:08 PM
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#1 | | Say NO to blade grinders!
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| Exhaust Piping.
I read the above, but I still wanted to get some opinions. This will be on a 2.0L 3SGTE turbo motor with a stock turbo pushing max say 15psi.
The exhaust I have is kinda weird here are the specs: 2.5" B-pipe then increases to 2.75" into the canister.
Now my question is would I benefit more from a 3" downpipe or 2.5"? Would the 3" DP create unwanted back pressure? Yea I know I need a new exhaust LOL. Will do when I decide to get a new turbo or something.
Thanks!
Last edited by Expresso; 10-18-2008 at 12:14 PM.
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10-18-2008, 05:07 PM
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#2 | | RS.net, helping ugly ppl have sex since 2001
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If your downpipe is 3" but flows into a B-pipe that's 2.5...then it really doesn't do anything. Might as well just stick with a 2.5" downpipe. Intuitively, you would think the flow is interrupted (turbulence) when it goes from 3 -> 2.5, and such is true. A straight 2.5 is much better.
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10-29-2008, 12:36 AM
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#3 | | OMGWTFBBQ is a common word I say everyday
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if your piping is only 2.5 there's no reason to get a 3" DP since it'll just get bottle necked anyways, unless you're planning on getting a 3" exhaust anyway. personally i think 2.5-2.75 is perfect for your setup, i say that even though i have a 3" on my NA car lol .
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10-29-2008, 01:07 AM
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#4 | | My dinner reheated before my turbo spooled
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I would go with a 2.5" downpipe setup.
Totally OT, but are you putting in that motor in your Prelude?
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10-29-2008, 10:07 AM
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#5 | | Say NO to blade grinders!
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Originally Posted by Prelude_2_NV I would go with a 2.5" downpipe setup.
Totally OT, but are you putting in that motor in your Prelude? | As you know the 3SGTE from the mr2 is essentially a FWD motor setup.  | |
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10-29-2008, 12:08 PM
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#6 | | My dinner reheated before my turbo spooled
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Yes I do know that and that's prolly why it should be a somewhat easy swap. | |
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10-30-2008, 05:21 PM
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#7 | | Wunder? Wonder?? Wander???
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Go with a 3" dp it will help spool even if it bottlenecks further down the line.
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03-20-2009, 04:53 PM
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#8 | | Need my Daily Fix of RS
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Originally Posted by brine04 Go with a 3" dp it will help spool even if it bottlenecks further down the line. | This. For sure. 3" all the way back would be ideal of course...
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03-23-2009, 07:19 AM
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#9 | | Ricer Mod
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If you have the option to do a 3" down pipe do it now rather than have to do it later. The boost gods will thank you for it.
Berz out.
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