Dual exhaust [Merged 7-9]

[out there]

then why is it that most of the guys with stock turbos that complain about boost creep have 2.5" or just cat-backs?

 

[Enigma_Man]

While you can fix boost creep by increasing the pressure in the exhaust system, you would totally fix boost creep by sealing off your exhaust completely

It's the wrong way to fix it, IMO. You either need to hog out your O2 housing, get an external dump, or use an external wastegate.

You want to make it easier for the exhaust to go out the wastegate, not harder for the exhaust to go out the turbine

-Jesse

 

[Knuckles2.0]

nice... that makes alot more sense ... thanks dude
so the external dump.... does that help out that much... seems like a small pipe to flow all that exhaust ..... enlighten' please

 

[kpt4321]

Huh? Think about it:

Which is bigger, 3+2 (dump + exhaust) or just 3 (dumb back into exhaust).

Plus, a small 2" dump tube is still bigger than the wastegate.

 

[Enigma_Man]

Yes, the external dump does help a lot, because instead of the gasses headed out the wastegate having to fight the pressure that's already in the exhaust, they're just zoomed right out to atmosphere.

-Jesse

 

[99 gst 420a dsm]

the only time you should run dual is to A) quiet the car down without a resonator, or B) if your running a 3inch cat-back and dont have a 3 inch muffler, i have two 2.5inch N1 mufflers for my mx-3, because i think it looks bad ass, performance wise, not a + it just looks mad sport to some people, and an external waistgate dosent have to fight the other exhaust gases to get out, the other exhaust gases act as a vacume for the waistage gases, people dump because its loud as hell and sounds cool to some, flow wise it dosent matter as far as i know

 

[BoBbOrAzE]

Hi, I am having a problem choosing the way of my exhaust its either between the thermal or doing a custom dual exhaust because i love the dual exhaust look and i dont like the size of the tip on most 3" i know its a 4 cylinder but i love the look, but i still would liek the performance so its about 50/50 and its driving me crazy.
well ive done a lot of searching on the dual exhaust topic and the most i have gotten out of it was that it was pointless to do and will not help. What i have also noticed is that the majority of the cars that were discussed were all non turbos.

my plan would be to have a 3" downpipe and test pipe then split to a y and then into two 3" inlet dual tip mufflers

What does everyone think of my idea? i cant see it really hurting performance because it would be 3" all the way back and if not flow a little bit more or at least the same as a single 3'' setup, and completely satisfy me because it would be "show and go" does this sound right??

 

[blMuskrat]

My opinion is it wouldn't look very good, but you shouldn't care what I think and do what you think looks good.

Performance wise it would introduce a slight restriction at the 'Y' but other than that I don't see any other problems with it. Remember, straighter is better with turbo exhaust.

 

[SilverMitsu]

your question: dual exhaust on a DSM

my answer: no...

 

[BoBbOrAzE]

if i did do dual it would def not be the big fart cans for sure that would look horrible it would be two seperate twin tip mufflers

yeah now im considering just going back to the single exhaust plan its just if i had to i would buy the thermal catback but it has a whopping 5" tip and other 3" exhuast tips are very large. wouldnt that just look ridiculous?? i dont want to look "ricer" or any of that ughh ill never get exhaust

 

[Ðawg]

if i did do dual it would def not be the big fart cans for sure that would look horrible it would be two seperate twin tip mufflers

yeah now im considering just going back to the single exhaust plan its just if i had to i would buy the thermal catback but it has a whopping 5" tip and other 3" exhuast tips are very large. wouldnt that just look ridiculous?? i dont want to look "ricer" or any of that ughh ill never get exhaust

You dont want it to look rice, but you are considering putting a dual exhaust on there?

 

[95Eclipsers]

puttin dual exhaust on your car aint rice!

Putting a 5" tach with a shiftlight in and auto accord is rice!

 

[heinzanova]

I have seen a few eclipses up in Hazleton with dual exhausts, and they had twin tips on them, a few had body kits that even accomidated that... I couldnt help but laugh and call them ricers... I meen come on... come on....

Ricer is someone who does something for the sheer show not go, but tries to play it off as both...

That is one tip, per cylender, do what makes you happy, but I personally wouldn't do it nor suppost the idea.


You also don't see turbo guys doing it, only the NA's cuz the turbo guys know where it's at, they dont want to waste a perfectly good car, by making it look silly, and not making it run the best it can.

 

[DSMeclipse4G63]

there is nothing rice about dual; on a 4 cylinder, srt, svo and many more come with duals. If thats the way you wanna go then go for it, I too wanted to go that route but gave up and got a ATR 3in. The reason is the passenger side pipe would come way to close to the fuel filler neck, that and you cant get true dual on a inline motor. If you do decide to go with duals from like the cat back, I would say 3in into like 2.25 seperate pipes. Dual 3in would be way too much and you would have no low end. 3in into 2.25 or 2.5 would work the best and out flow a 3in system. If you want a decent or same low end response and flow as a 3in setup Id go 2.5 downpipe into 2.25 seperate duals. If you have the time money and will I say go for it, why not its your car not anyone elses do what you like and want.
Andrew

 

[Dieselboy]

puttin dual exhaust on your car aint rice!

If it doesnt come with it stock, and if its an inline motor, yeah it is. I dont know why the hell Dodge put the dual axle back on the SRT4, its virtually useless. A true dual exhaust only benifits a V6 or V8 because there are two seperate exhaust systems coming from each side of the motor. If you were to combine those into one system halfway or so down the exhaust, it would probably hurt performance because each side of the flow is smacking into eachother and bottlenecking at that point. Same thing with "Y'ing" off a single exhaust into a dual exhaust. You start off with a single pipe, then seperate it with a Y pipe. What happens? The flow smacks right into that Y and makes an unecessary split and taking a longer route to exit when it could just have a single flow with less length to travel.

Bottom line, single exhaust for I-4 and I-6. Dual for V-6, V-8, V-10, etc...

 

[BoBbOrAzE]

im still deciding what to do and your probably right it might flow too much but wasnt the best exhaust for a turbo no exhaust?? so how could it flow to much

well when u think about it who really would think of it as "rice"??? pointless? probably yes. people would rather call a single 5" tip coming off of my thermal muffler rice rather than a much smaller dual tip or single tip exhaust on each side?

as i stated above i am 50/50 i want all the performance but i want it to look good at the same time mostly i dont like the look of the single side exhausts with large tips. but i would never sacrifice looks for performance thats why if it flows as much as at least a single 3" exhaust and it looks good IMO then im golden
i was just wondering if i could still get at least the performance of single 3" exhaust but at the same time have the look of the dual and there really are plenty of cars with dual that are 4 cylinders toyota mr2 dodge srt hyundai tiburon and plenty of under 12 sec dsms ye it doesnt matter i will eventualy do whatever i think im jus surprised that some people actually think its a bad idea if i get the same performance as a single 3" and look good at the same time

im still undecided knowing me i will proabably end up going for the thermal exhaust becuase its a 10 min ride to go pick it up and its very nice

 

[autronicDSM]

Why not just install a dual tip muffler on your 3" single exhaust.

 

[BoBbOrAzE]

thats also a good idea what would the smallest tip size be where i wouldnt lose performance to it you think? two 2.25s? together would flow as much as a single 3"

 

[96TSi_Chris]

I have a 3" exhaust w/ a 5" tip and i have never ever heard the word rice around my car. When people know you are turbo w/ a big exhaust, the R word will not come out. Now a 90 accord w/ a 5" tip, umm yeah you might hear rice quite a few times.

 

[Dieselboy]

My first DSM had a 3" Apex N1 catback. I NEVER heard the word rice ever:

 

[heinzanova]

there is nothing rice about dual; on a 4 cylinder, srt, svo and many more come with duals.
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Andrew

you said it yourself, they came stock with it... stock, stock...


BTW citing a non performance car, IE Hyndia is not a valid thing... we are talking about a real car, a turbo dsm... not ur granny's civic

 

[Dieselboy]

Yes, but its not a true dual exhaust, its a single off the motor until it hits the rear axle, then it becomes a Y pipe and seperates into two exhaust tips. Theres nothing performance oriented about a design like that at all, its all for looks. Honestly, if I were to buy an SRT4 someday, I would definitly convert it to a single 3" exhaust system.

Think about it, instead of choosing a single and shorter path, your seperating it and causing an uneeded extension of length in the exhaust. Its all for looks unless its a TRUE dual exhaust which I stated above in my previous post, and that can only be done with a V6, V8, etc....

 

[DSMeclipse4G63]

you said it yourself, they came stock with it... stock, stock...


BTW citing a non performance car, IE Hyndia is not a valid thing... we are talking about a real car, a turbo dsm... not ur granny's civic

never did I bring up a civic or a HYUNDAI(not hyndia). Besides alot of people with svo's like the 86 came with single and the 87 came with dual, but the dual flowed more so it was an upgrade. Also to little backpressure slows the exhaust flow and so on so a 5in exhaust would almost be worthless unless you were pushing ALOT of power.
Andrew

ps all Im saying is if he wants to do it so be it, just because everyone has single doesnt mean its RICE, it just means its DIFFERENT. You know like something out of the ordinary....but I guess different in the DSM community cant be tolerated....

 

[96TSi_Chris]

never did I bring up a civic or a HYUNDAI(not hyndia). Besides alot of people with svo's like the 86 came with single and the 87 came with dual, but the dual flowed more so it was an upgrade. Also to little backpressure slows the exhaust flow and so on so a 5in exhaust would almost be worthless unless you were pushing ALOT of power.
Andrew

ps all Im saying is if he wants to do it so be it, just because everyone has single doesnt mean its RICE, it just means its DIFFERENT. You know like something out of the ordinary....but I guess different in the DSM community cant be tolerated....

First off no one is talking about 5" exhausts. We are trying to direct him into a 3" exhaust, not 5".

Second, he asked the question and people are giving their honesty. It would look stupid and wouldnt do a damn thing performance wise over a true 3" exhaust. Sure its different, but i could paint my car pink and purple and be different, but it doesnt make it look good.

 

[DSMeclipse4G63]

First off no one is talking about 5" exhausts. We are trying to direct him into a 3" exhaust, not 5".

Second, he asked the question and people are giving their honesty. It would look stupid and wouldnt do a damn thing performance wise over a true 3" exhaust. Sure its different, but i could paint my car pink and purple and be different, but it doesnt make it look good.

first off Im not talking about 5in, just merley replying to his question about bigger = better. besides if you thought your car looked cool in pink and purple, wouldnt that be all that mattered? Its YOUR car unless your car is a show car then what the fvck do you car what people think about your setup...unless everyone buys there car to be with the"in crowd" and please other people. Me I bought my car for me, if I thought my car looked cool to bolt a 2*4 to my hodd the so be it..because its my car and not everyone elses. Do you see what I mean, Im not being a smart ass.
Andrew