Engine Exhaust Pipe Size?

confusing...

i know i keep talking about the 240 but...That duel exhaust is 2 2.5" piping. But man i would talk to a performance shop or exhaust shop before you deside to keep your stock piping. Just a muffler will not give you gains like a catback

Mine gain very good throtle responce with 2.5

AHHHHHHHHHHHHHHHHHHHHHHHHHHHHH STOP THIS MYTH. BACKPRESSURE IS BAD.
No backpreasure is good. More hp that way. Also the sizing of your exhaust depends on how much air your putting out. If you put a 2.5 on like i did when i had my corolla it laged when someone was in it becuase it needs more power in it.

In the 240 community someone has dyno proven that 3" exhaust works great on stock N/A. This is on a 4cyl. Everyone thought it was to big till he posted dynos.Like another thing on the 240. Apexi makes a 3" flange to 2.5" piping and its great! Also do you want backpreasure when you have a turbo? no i don't think so.

Prizmatic: if you want to go duels. Put more balls into your engine first. Just have someone make duel pipes connecting to 1 flange.

But in the end, if you just put exhaust on your car it won't do jack without more stuff motor wise.

In the end, to big can have negative effects. The right sizing can have the greatest effect. Thats why there is a correct sizing for turbo and correct sizing for N/A. Sometimes the exhaust design plays a roll in both. Like the apexi example i brought up earlier.

The Duel N1 exhaust made by apexi for the 240, has the 3" flange and the 2.5" duel pipeing. Now with that in mind. It has no problems with N/A or F/I. So, i could buy it tomorrow throw it on my STOCK car and it won't lag ,it won't do anything of the sorts, but sound great. It won't make my car really that much faster. But it wouldn't be to small for F/I eather.

what does tires and suspension have to do w/ exhaust and engine performance? just wonderin..

sorry i was editing somethings to make more sense. My grammer is horrible. I forget to add commas and periods where they needed to be like the tires and suspention.

I really need to use the "Preview post" button more often

will someone please tell me how back pressure is supposed to help your cars performance, because I have heard somewhere that it is bullsh!t. Oh, nevermind, w1nger just fixed his post, I knew that back pressure wasnt any good. And why do you think with dual exhaust the sound of two mufflers will sound bad?

well the duel exhaust idea is usually duel muffler. But with the Duel N1 example takes 2 pipes and 2 mufflers and puts them next to each other. Sound is so agressive on the 240 KA24 its not even funny. Now on a 1zz 1.8L i dunno.

At least the 03' sounds good

here ya go prizmatic http://www.geocities.com/MotorCity/...austtheory.html all about the exhaust system...

ok dork, when you have a car as slow as ours, how much horse power do you think you are going to lose, nothing considerable, and come on, like you dont like the sound of nice exhuast, wether it is a muffler or straight exhuast, if you dont get satisfaction from something like that, then maybe you should reconsider how much you enjoy cars. Who the hell doesnt like the sound of nice exhuast, I do. And I think two flowmasters would sound nice, you may not think so but you dont have to bash it dumbass. And how the hell would you call that rice, nevermind dont even respond(rollatuner). And trust me if I had the money then I would put my money into a different car then a prizm. But I dont so therefore I work with what I have, just like you

ok, i was a bit harsh. I just don't think that the dual setup will sound any better than a single. Thats all I really meant to say. The piping size will also alter the tone of the exhaust. You might wanna play around with different sizes for the best sound.

i think you guys are misunderstanding me. I know that I am not going to get big or any horsepower gains, I would like dual exhaust merely for looks and sound. But I will seek the advice of a knowledgeable muffler tech before doing anything.

ok thats fine.Usually its easier to do a duel tip canaster like some of the matrix owners do. Its a lot cleaner to use 1 pipe and a duel canester. If you do 2 pipes its going to be next to each other.

Let me get this straight. You just want the dual setup for sound and looks. So pretty much all show, no go? This sounds like the defining characteristics of RICE. You might want to do something else. Save up for another car.

yeah....different size pipes....like a bigger pipe to one muffler so you get a lil harmony goin on there...

there's a guy at college that has a neon w/ dual apexi N1 style exhausts-all i can i say is that its deafeningly loud. even the slightest touch of the pedal makes a loud rumble! but if thats what you want-GO FOR IT! Ive always loved flowmaster-but my old friend that has a 600hp pontiac firebird got "loudmouth" exhaust instead b/c he said flowmaster was too quiet! man that biatch SHAKES the earth! if your looking for a V8 sound-the only method to go about that is to just go w/ a glasspack muffler (cherry bomb) or straight pipe...during idle, itll sound alot like a V8, but as soon as you rev it up-itll sound more like a the 4 banger its supposed to be..

Dual exhaust on a prizm will be the essence of the site laughatrice.com heh... sorry to say. I don't think it'll sound much better either. Just a louder 4 banger.

Don't get me wrong. I love dual exhaust too, on a V8. I also have a prizm. I tried the whole huge exhaust thing. But unless you actually doing anything to the engine. Don't bother. Just get an axle back if you want it to sound good. Stick with one muffler and you'll be happy I'm sure. Down the road if you make more then 200hp then maybe consider it. Even the 215hp Lexus IS300 has a single exhaust.

Put a dual exhaust on and your car will be even slower. Listen to that nice dual exhaust kitten purr... oooo...

Sorry to be rash but when you see a fellow slow car go for something like this... you have to warn them.

okay as for the N1 style exhaust system, I got a AlphaWerks exhaust system a 2.25 piping full cat back N1 style..unfortunately it wasnt a real cat back it was just a resonator instead of a cat but that shit sounded mean and like the latter post of a V8 when stopped thats how mine sounded...With a 2.25 piping I noticed some slight loss in the low end but a good noticable gain in top end but then again I got an intake but Im taking it you got some other work done to your prizm besides your illusion a Dual set up is gonna sound nice...dont get me wrong dual exaust is nice ON SOME cars I just dont think it looks nice or "clean" on our rides and also your gonna lose alot of power from our already slow rides as you claim. Just reconsider your idea on the dual and go for a single want a nice deep mean sounding exhaust go for an N1 style set up with a 2.25 piping now if u want no backpressure then fuck it skip 2.5 and go all out to a 3" but your gonna kick yo self in the ass when u gotta slam on the gas pedal to get from 0-20 but thats IMO to each his/her own Anyhow good luck with whatever decision you make and if u do get the dual at least get a diff bumper so itll match better and look a little cleaner.....

SRT-4 has a duel look. No one laughs at that car

The srt-4 looks very nice w/ its two tips on the back-almost like the 350z...-both of those cars NEED the dual exits..

but the SRT-4 is a 4 cyl.....

and the SRT and 350 have the bumper to pull it off.....thats why Im saying change the bumper to make it look clean with the dual set up...hmm and as far as the SRT goes its umm boostin unlike the prizm and most of us rollas I dont know how domestics are when it comes to boostin and their four bangers but when u got boost u want the least amount of restriction like a 3" setup but N/A u DO want a bit of restriction especially on our rollas say what u want to say but I work with a dealer and I have friends that only deal with toyotas lose too much backpressure ur gonna end up with a car with a rough idle poor accelearation and a nasty gas consumption.....I dunno about you but Im hurting as it is paying 22 bucks every week for gas.......but hell to each his/her own like I said before go for it mad props if u do I aint gonna hate on your idea its your ride...but at least change the bumper if u do and dont get no shitty brand exhaust either like Arospeed or how ever that shits spelled...get an Apex, Borla, Flowmaster...

Well I will definetley stick to the flowmaster muffler, and I guess I will probably stick with the single exhuast due to everyone chastising the dual setup, but let me get this straight, what would be the best pipe size so there is no back pressure but the exhaust gasses still stays hot enough to flow fast? Thanks for the feedback.

get about 2.5 or bigger. You prolly don't wanna go over 3 inch. Too keep the gasses moving even better you can wrap the exhaust system to keep the gasses hot.

the srt-4 is a large 4cyl with a turbo and intercooler and makes almost double that of a corolla. It deserves dual exhaust and a real tough sound. Im not gonna stop or make fun of anything that anyone else is doing but i really dont like many 4cyl with loud exhaust, ive only come across maybe about 5% that ive liked. I really love the growl of a v8 and nothing can compare to it. A 69 camaro with flowmaster exhaust is just one of a kind. no corolla can ever sound like that.