2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

any series 4 n/a with 2 1/2" piping?

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Old Apr 3, 2002 | 12:07 AM
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From: yeep.
any series 4 n/a with 2 1/2" piping?

hi.

seems like a bit much... but im thinking...

2 1/2 inch,.. single pipe... going back to the passenger side for a little more back pressure.


anyone have experience on this?


ps.. my new muffl0r..


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Old Apr 3, 2002 | 09:22 AM
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I take it you're from Japan?&nbsp Haven't seen a Pocari Sweat can in a LONG time!


-Ted
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Old Apr 3, 2002 | 10:07 AM
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From: brick, nj
i have 2.5 dynomax duals w/ a 2.5 highflow cat, the backpressure is nice, and lod when you get on it, but what you gain in higher rpm you lose a little in the low.....
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Old Apr 3, 2002 | 10:52 AM
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very nice... 2.5 is just perfect!!
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Old Apr 3, 2002 | 11:14 AM
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check out my exhaust setup in my sig...
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Old Apr 3, 2002 | 11:57 AM
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From: yeep.
Originally posted by RETed
I take it you're from Japan?&nbsp Haven't seen a Pocari Sweat can in a LONG time!

-Ted
actually im about 3 hours away from u... about 20 min. east of los angeles :P

ok cool i was worried 2 1/2" would be a bit much!!

thanks!
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Old Apr 3, 2002 | 04:01 PM
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From: Windsor, Ontario, Canada
It's perfect.
If you really start going nuts with the mods, like a street port, etc, 3" isn't overkill either!!
I have a 2 1/2" straight pipe.. going into dual 2 1/4" pipes.

A little off topic rant.. ahem:

Your catback, if it's dual, never needs to be more than 2 1/4 inch, since header runners are only 2" anyways, and they are at the hottest (most expanded air) and highest velocity point in the exhaust...
Going larger than that will only hurt power, since it won't maintain exhaust pulse velocity which is key to the scavengine effect that makes power!! The air is much cooler as it approaches the end of the pipe too, which means its more condensed as well, requiring smaller volume.

Since you are going single.... this is pointless... but I'm bored.
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