3" piping to much for N/A Exhaust?

[STL240SX]

Is 3" piping and a 4" tip too much for a N/A exhaust? Would that just kill all the low end torque? Any of you have this set up on your N/A car, with pics to show??

[LanceS13]

You probably won't notice the low end loss. High end improves decently. Besides the fact that it just looks too damn big, I am satisfied with my N1 Single--same dimensions you mentioned. But if you have no plans to go forced induction, I'd go with 2.5" or 2.75" piping for better power gain throughout the rev range.

[Yoshi]

Originally posted by STL240SX
Is 3" piping and a 4" tip too much for a N/A exhaust? Would that just kill all the low end torque? Any of you have this set up on your N/A car, with pics to show??

well, with the exception of everyone laughing and pointing at your car, there's only 1 other thing wrong with this. 3" is less about looks, and more about getting pulled over.

a NA car with a 3" catback and a 4" tip is going to be LOUD. Do a search, this has been discussed almost as much as drifting and SR vs. KA . Your car will annoy everyone around you, drown out your stereo, and most likely get you pulled over. Most people agree that the max pipe diameter on a NA engine should be 2.75 and the VERY MOST.

[mistaanime]

Imma bout to get a HK Dragger..think that will be too big?

[AKADriver]

Originally posted by Yoshi
Most people agree that the max pipe diameter on a NA engine should be 2.75 and the VERY MOST.

It all depends on the engine.

I know someone with an N/A 2.0 (non-Nissan) that was making good use of 3" piping. Granted, he was putting about 200hp to the ground, and the car was audible from half a mile, but you can't say noone will ever need it.

Chances are, though, if you have to ask, you're not making enough power, stick with a 60-70mm, or 2.5" exhaust.

[crioten]

STL240SX youre a cop arent you? i feel that the police in stl area are kinda easy going about exhaust, and most aftermarket add ons, what do you think? i mean youre doing these things, would you get ****ed at a cop if they pulled you over for some kinda exhaust violation?

just wondering what these things are like from an officers point of view...

[Muzzy]

yea im runnin 2.75(blitz nur spec)...if i was runnin 3" i think it would definately be too loud...especially since im runnin no cat


http://www.zilvia.net/f/showthread.php?s=&threadid=30982&highlight=blitz+nur+spec

look at that cack suker

[mistaanime]

dang...muzzy...one sick a$$ exhust...how much?

[STL240SX]

You know what, i am a cop as a matter of fact. I am also big into cars, and i honestly dont mind a slightly louder exhaust. I actually see them all the time on the riced out hondas( not that i want to sound like that). I just want a deep throaty sounding exhaust that will give me nice high end power gains, while at the same time keeping the low end torque. I have pulled people over for their exhaust being too loud, and 99% of the time ill let them go with no more than a warning. Unless its something that is truely ithout a doubt illegal. Such as no catalytic converter, no muffler, etc.. I actually just recently pulled over a guy in a turbo S14 that was just passing through town on his way to Chicago. No ticket, nothing we just talked about our cars for a few. Anyway i guess it depends on the officer, but myself, i try to be a little more lenient about it, since i myself tune my car. I try not to be a dick as often as possible.

[Muzzy]

580 plus tax..so 620 total..free shipping

[sL103]

maxium boost says that bigger the better is not always the case that only works on womens chest size ;-). But anyways 2 1/2 will be fine for about 450~500hp. unless you got an NA that does that i would like to see it that would be sweet. So that would work for just about anything. so stay with 2 1/2

Shawn

[Muzzy]

yea dont listen to him thas bull crap...to a point

if it is runnin 450-500 with 2.5"...imagine wut it could do with 3"

[mistaanime]

how bout getting a turbo exhust? will it make your car lose torque?

[Muzzy]

wth??

turbo exhaust is usually considered 2.75 and up...and u might lose a tiny bit of low end but you'll love the high end results i know i did

[docrice]

I JUST got my exhaust on my ka, i have a header, hi flow cat, and 2.5" piping all the way back to a apexi dual n1 knockoff muffler (pics and sound clips on the way) and it is F$&#ing loud...it's throaty as he11 (my bro said it sounds like a baby v8), but very loud. and even with only 2.5", it still pops a little so anything bigger would have quite a cackle i imagine. i'm waiting for my silencers since i didnt get them with my muffler (never buy from racerwheel.com)...funny thing was i had hondas revving at me so i just tapped the gas and rattled their mirrors more than their "mad tyte systemz" do.

[TwoFourO]

I plan on swapping an SR in very soon, but for now I have the Apex'i Dual N1 cat-back with a 3" test pipe replacing the cat. I'm looking around for silencers off some hondas...lol. Anyways, this set-up is WAY too loud. It's almost unbearable. The car sounds farty at lower rpm's, and extremely race-like at higher rpm's. The car pulls more in the higher rpm's with minimal torque-loss in the lower end. The car is experiencing back pressure problems and will make a back firing noise in the morning when the exhaust is cold. Don't go any bigger than 2.75 if you're going N/A is my recommendation. Good luck.

[ILiveToDrift]

I just installed my apexi N1 yesterday and I dont think its loud, but I did go from no muffler to a N1. Damn thing rusted off! But I have an Injen intake, Greddy headers, asp pully, and the N1 and I think that it pulls/revs beter then ever but that could be because of the pully.

[Yoshi]

"Rise from your grave!"

why are we reviving a thread that was redundant 2 begin with? ack!

[Lyger]

oooopppppppssssss!

[MrSpArkle]

http://www.zilvia.net/f/showpost.php?p=382842&postcount=9

With a properly designed exhaust, you will NOT lose power in ANY part of the rpm range. The only trade off is noise.

[s14unimog]

stock manafold but 3" downpipe, high flow cat magnaflow res. and HKS hiper cat back and its loud ass fuck but sounds so deep b/c of the res. I love my exhaust and I have never been pulled over for it. It all depends on what you want (small NA tuned exhaust, or loud ass turbo exhaust) even if you don't have a turbo. See mine used to have a turbo and the exhaust was used for that but, I will race my other friends with 240 and my torque is fine. :boink:

[nightwalker]

guys on FA dynoed a 3inch exhaust on NA KA, and loss no torque, actually gained 12hp at the wheels, and 8lbs of torque. Just something to ponder.

[MrSpArkle]

guys on FA dynoed a 3inch exhaust on NA KA, and loss no torque, actually gained 12hp at the wheels, and 8lbs of torque. Just something to ponder.

yep, that's what i said (scroll up, the FA thread title is "5Zigen Pro Racer exhaust dyno................ wow")
but the "YOU NEED BACKPRESSURE FOR TORQUE [email protected]#" types won't let the myth die. god forbid dyno results get in the way of lies.

[evil_s13]

ok i have a N/A ka24de with the apexi 3inch N1cat-back system, and it is not loud at all. From my experiance the smaller the piping the louder your car is, and bigger the piping the deeper it is. Most of the time it depends on what kind of muffler you have on it.

[Turtle]

Old thread but have a question. I want to get 2 1/2 piping for my car. No muffler at all. I just want everything straight with a catalytic. Will it pass emissions? I want to have a 4 inch tip no muffler though, how would that sound? NA KA

[ZX88]

well, with the exception of everyone laughing and pointing at your car, there's only 1 other thing wrong with this. 3" is less about looks, and more about getting pulled over.

a NA car with a 3" catback and a 4" tip is going to be LOUD. Do a search, this has been discussed almost as much as drifting and SR vs. KA . Your car will annoy everyone around you, drown out your stereo, and most likely get you pulled over. Most people agree that the max pipe diameter on a NA engine should be 2.75 and the VERY MOST.

i agree with you i have 3inch piping going to a 4.5 tip and with out a silencer its way to loud to drive around neighborhoods especially when driving around 2k shit is unbearable.

[adrians_s13]

damn this threads [email protected] Oooold... lol

Old thread but have a question. I want to get 2 1/2 piping for my car. No muffler at all. I just want everything straight with a catalytic. Will it pass emissions? I want to have a 4 inch tip no muffler though, how would that sound? NA KA

I'd assume it may pass, but its gonna be loud without a muffler and/or resonators...

[xblack240x]

As long as you have a cat, and you've passed emissions before, I'm pretty sure running 2.5" to a 4" tip should pass, but it'll be pretty loud... I'm not a smog expert but it should be good... Good luck and DAMN what an old thread...

[Turtle]

Yea, it passed before no problems. 188k miles but no rattle anywhere! No time chain rattle. I tuned up everything good. all censors and everything so I think it should be pretty good.

[overb0ost]

im running the trust dd on my s14

3" test pipe, 3" piping. splits into 4" tips that are about 2ft long.

stock KA

i got used to it

[Phlip]

Old thread but have a question. I want to get 2 1/2 piping for my car. No muffler at all. I just want everything straight with a catalytic. Will it pass emissions? I want to have a 4 inch tip no muffler though, how would that sound? NA KA

You recognized that this thread is old, so I will answer your questions before I close it...
2.5" will not be the killer of your passing of emissions, so much as will the lack of components. This does not even mention the fact that it will be UNGODLY loud, especially with the fact that it is NA.
Part of the question presented here almost makes me wary that I am responding to a troll here, but some people think I lock threads for nothing. Fact, though, is that I am locking this one so someone doesn't wait 4 years and bump it for nothing.
... again