Exhaust question

[Camel]

I am running an Apexi N1 single catback with resonator(75-85mm piping with 110mm tip) on an NA setup. Stock header and cat/downpipe/fakecat on a 98 ka. After i have run it hard for 20 to 30 minutes it tends to sound like it is popping inside the pipe. Not really a backfire but a resonant popping. It seems like I don't have enough backpressure for an NA setup. I am running with the silencer, that definately helps quiet it down a bit.

Here's what I was wondering, could I have a muffler shop replace the fake cat with another resonator to calm it dowm a little and add a little backpressure back into the system? I don't plan to turbo for a while, but i got a good deal on the catback system so I went ahead and put it on.

I have searched and not found any answers that fit my specific situation.

Thanks for any good advice...

C

[Camel]

Anyone want to comment on this before it rolls off the board? I would appreciate it greatly.

[Structure240sx]

mine always did that before and after turbo. before when i had mineke 2.25" custom and my gp sports spec d. its jsut natural i think technoman might have said . the stock exhuast is so restricting and has dampners that keep u from hearing those lil pops whatever they are

[Camel]

Thanks Structure. That makes me feel better about my purchase and install. I thought that I may have gotten too large of piping and it was causing problems. Is this exhaust too big for an NA car?

[Structure240sx]

not really you'll just lose some low end power but your top end will be a lil better than a smaller exhuast. its jsut more suited for turbo.

[lbrowne]

I'm just replacing my cat with a new one, removing the resonator, and replacing the old and tired muffler.

Keeping the stock 2 inch piping. I have more exhaust coming out around my cat than I do out my muffler