^ ^
Dual exhaust on a 4cyl won't free up restrictions, 90% of the time it further restricts the flow with the addition of extra piping that is un-needed. Your gains in whp would be less than a well designed axle back, and you could potientally loose more wtq than an oversized single exhaust set up. Of course, a lot of this depends on the actual design of the dual set up but no matter how you look at it, no matter what speed you are traveling or how hard you accelerate, i have yet to see a dual set up on any 4cyl that shows performance benefit on n/a and f/i situations.

Also, wtq doesn't completely mean better acceleration or win races. This has been covered numerous times, but it doesn't. Weight and gearing play a larger role than whp or wtq. Which is why you see civics and hatchbacks run 12's with 250whp, 160wtq when it takes the tC 280-300whp, 260wtq and so on. Only reason i'm bringing this up is because you said "...I would rather not have theloss of torque for the much needed acceleration."

EDIT: You can also reach low 12's on a hatchback with as little as 200-210whp, and only around 140wtq. People assume too much when they see heavier cars put 300whp+ and 250wtq+ reach 12's, many assume this rule applys to any car out there and it doesn't. I just wanted to add this on since i said 250whp, because that doesn't really apply to all civics or any other car for that matter.

 

Ditto

 

Potentially, an inline car could benefit if the dual split goes after a muffling or catalyzing device.

It's basically the concept of two straws over one large one. It's easier to take in twice the amount of liquid with two straws but is a little harder than taking in twice the amount of liquid in a straw with twice the opening area. However, once getting down to the very low levels of liquid in the cup, it's easier to drink in twice the amount of liquid with two straws versus twice the amount of liquid in the big single straw. In fact, one has to work a lot harder to drink the same amount of liquid as the dual straw, over the single straw.

This work that is used to take in more liquid equates torque loss. That is why giant exhausts tend to lose torque in the low end.

The above example illustrates the benefits of a dual exhaust.

Perhaps a better example would be water container with the same two setups. One container has two straws and the other one has one bigger one. Once pressure lessens, the velocity of the water exiting the larger pipe will be significantly less than the that of the two streams exiting the two smaller pipes.

Even more simply, having a dual exhaust will better the low end and still provide a pretty good top end.

Of course, the tC won't have one header per section of exhaust. That is why the split will help if it comes after some sort of exhaust velocity reducing device such as a muffler, resonator, or cat. As EGT lowers across these devices, a split will allow the stream to maintain a high pressure and velocity to negate the EGT drop.




But I just write because I like to write. The gain in performance is so minimal that I don't think it even exists. Sorry, I just made you read nothing important.

I want duals because I like symmetry. I also want twice the muffling to even further lessen the sound of my exhaust.. basically, I don't want people to hear my car.

 

well. i hate to say it, but some of you misunderstood my posts. no where did i say i want to run dual muffler. that has already been discussed on another thread, several in fact. i want 1 DUAL TIPPED muffler. 1 muffler, 2 tips. but i know it some went off with their own ideas. anyways, stylis, i was talking about your dual muffler set up, i know you have a really quiet axle back. very tempting, but i want 2 tips, purely for that custom, sweet look!

 

Larger exhaust, or split exhaust, also slows down the flow, allowing gas to cool more quickly, meaning it is more dense and harder to move. Bigger is not necessarrilly going to get you anything overall. Neither is splitting the piping. It is not as simple as the bigger the better.

Also.. the light cars needing less tq and hp has no meaning here. He is worried about losing RELATIVE power. He is not making the car lighter.. but is worried he may lose power, which WILL make a negative impact on the same vehicle.

Personally I dont think it will make much difference either way other than possibly the way it sounds.

 

In that case, i'm sorry for wasting everyones time. I just read what others input was, and assumed you wanted a dual exhaust set up vs. dual tip. Dual tips imo are hard to pull off, i see a lot of crappy out comes with it. However, if you can make it look good then more power to you!

 

im sure going to try!

 

I had no doubt that you wanted the one muffler with two tips. Hence the name of the topic. Trying to make that dang muffler fit on the tC, to the avail of everyone; it will not happen. The only other cars out there that have a muffler desin similiar to the tC is the Rav 4 and the 1980's Saab 900s' But those are also single tip mufflers, the Rav 4 club came over already and tried to get my system for the tC to work on their vehicles with no luck.

 

i wasnt talking about you, to the guy bashing about how its stupid to have duals, i was clarifying. =)

 

also, was that your final anwer?=)

so its a definate no go with the z muffler?

 

I am going to say,"yes you can make it fit" Will it cost a lof of money? Maybe. It really depends on the muffler shop and their time to make it fit.

 

what would you consider a lot of money? just for comparison i have a local muffler and brake shop, "Kev's",
(for price comparison), took my single muffler off my 95 v6 accord, and did new piping from the cat back, replaced the original muffler and added a second one on the other side,(i provided the mufflers), for about 170 ish. Needless to say, a very reasonable place (like yours from what i read). Seeing from what they charged for all that piping, and the custom mounted muffler for 170, (i know you cannot say for sure, but since you are a muffler shop, im hoping you can give me your opinion b4 i call them and try to explain bla bla bla), what do you think they would say, considering their price for the other install, over 250? (just throw a number out, i know im stretching)