My 3" Exhaust Project (Test Pipe Hissing Solved)

FPenvy

any idea on what the performance of the 3" vs 2.5" on the N/A set up is yet?

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324whp/258wtq AAM Tuned |F.I. NonRes CF CBE/NonRes TestPipes #373|UpRev Tuner|Akuma Motorsports Intakes|Z1 34 Row Oil Cooler

MyKindaGuise

It would probably lose power at that point. That's too much flow and not enough back pressure. I actually just redid my exhaust FP. its up in the MA thread. No hiss on mine and no obnoxious rasp on decel. Just longtube headers and stock muffler delete.

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|445whp398tq|
|BW S259 Turbo|3" Downpipe\Exhaust|ID1000|AeroMotive|Tial|EcuTek|BC BR|S0-4|MaffFab|
MKGs-Single-Turbo

FPenvy

link?

soooo no mufflers and any resonators? sounds like without mufflers you'd end up with some rasp but i could be wrong.

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324whp/258wtq AAM Tuned |F.I. NonRes CF CBE/NonRes TestPipes #373|UpRev Tuner|Akuma Motorsports Intakes|Z1 34 Row Oil Cooler

MyKindaGuise

Well it is raspier than usual on accel just none on decal which I had terrible amounts of that with the ark+FI combo.

Ill post the video hang on

EDIT

370Z Cold Start. LOUD! - YouTube

https://www.youtube.com/watch?v=itY2...gdata_playerMy


2.5" LTH's and 2.25" stock exhaust with custom short tails.

Its atleast 25% louder over the ARK+FI combo

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|445whp398tq|
|BW S259 Turbo|3" Downpipe\Exhaust|ID1000|AeroMotive|Tial|EcuTek|BC BR|S0-4|MaffFab|
MKGs-Single-Turbo

FPenvy

soooo you're saying that my non-res TP and CBE set up will be super loud when i make my own short tails? lol

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324whp/258wtq AAM Tuned |F.I. NonRes CF CBE/NonRes TestPipes #373|UpRev Tuner|Akuma Motorsports Intakes|Z1 34 Row Oil Cooler

MyKindaGuise

It certainly will haha.

__________________
|445whp398tq|
|BW S259 Turbo|3" Downpipe\Exhaust|ID1000|AeroMotive|Tial|EcuTek|BC BR|S0-4|MaffFab|
MKGs-Single-Turbo

SS_Firehawk

Relieving back-pressure will always increase power, but at the expense of low end. The power loss being felt is most likely the loss in velocity of the exhaust gasses at low rpm. The returns in top end of course diminish the larger you go. Hence why dual 2.5" recommended, 2.75 max on a NA car, heck maybe even on supercharged Z's too.

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nklear

100% there is a power loss do to lack of back pressure. (probably power loss from 0 to 4000rpms, maybe a power gain from 4000 to 7500rpms)