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Unread 04-17-2014, 12:33 PM   #11
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Just to clarify, putting on quad tips will not decrease power output right?

I've been told it does.
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Unread 04-17-2014, 01:05 PM   #12
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probably will. There is such a thing as too little backpressure
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Unread 04-17-2014, 11:38 PM   #13
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It most definitely will on such a low displacement NA car.
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Unread 04-18-2014, 11:00 AM   #14
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Quote:
Originally Posted by cluffenstein View Post
probably will. There is such a thing as too little backpressure
I read up on back pressure when I had my Altima. Was looking into options of 2.5" exhaust running the same bends for the back pressure.
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Unread 04-18-2014, 03:02 PM   #15
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Back pressure is a misnomer guys, scavenging is the relevant term.
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Unread 04-21-2014, 07:13 PM   #16
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How do you even measure the "Back Pressure" in the exhaust?

Parts of the exhaust has already been slightly modified when we repaired/replaced it.
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Unread 04-22-2014, 04:25 PM   #17
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Quote:
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back pressure is a misnomer guys, scavenging is the relevant term.
yup!
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Unread 05-01-2014, 12:46 AM   #18
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Just found a photo of what I'm trying to do, but with square tips and a smaller diameter.


What do you guys think?

Quote:
It looks something like these.


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Unread 05-01-2014, 08:56 AM   #19
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Yeah i think so, with a set of true equal length headers, and a free flowing mandrel bent exhaust with no cat in there, i think you might see a 10hp gain.
10% from exhaust and headers is quite a gain. My rotary which gulps air like a som***** compared to a piston engine gained literally no HP from an open flow racing header and single pipe 3" open exhaust. I've yet to see clear evidence of ANY hp gain on people who upgrade their exhaust and headers on the 05-09 GT that can't be attributed to a good dyno run. Max I've seen is 12bhp and one was done in winter and one in summer.

You can probably pop on tips without any problem, just don't change the exhaust. Shouldn't change it at all if you just change the tips.
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Unread 05-01-2014, 04:17 PM   #20
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If you only care about how it looks go ahead.
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