Roush style exhaust

[Inygknok]

I have been collecting many ideas from fellow Supra owners for quite a damn while now. From those, I play around with them to make them a bit more unique if possible.


Now, one idea that has fascinated me, and I haven't been able to find on this forum is the idea of the double side exhaust. I did get to see ONE guy who did it..... but it was apparently for his younger brother or something, and was done in a ghetto fashion (no disrespect meant, honest).


I had a few drawings in a notebook, but I can do much better. Gotta get around doing the drawings in scale properly. Anyhow, for now I wanted to ask a few things:

1- Anyone got a damn good underside picture of our cars?

2- Has anyone else tried this that I wasn't able to find using the search?

3- Any positive tips the wise would want to share with me so I can go through this without having too much of a harsh time?


Oh yea, almost forgot. I had 4 different ideas on how to pull this off. One was pretty much the Roush Mustang style. The other ones are hard to explain, I'll at least try to do some "ghetto" drawings to get my point across later tonight, just gotta wait until the cough medicine wears off.


Really appreciate all those who give me a hand on this one! I think it's going to be the most complicated thing I will be doing to the car, aside from trying out re-upholstering the main carpet floor with a friend without ever having done it before!

 

[bowsercake]

Compliments of Bishop of www.ma70.com

 

[robeats91t]

Check this place out: http://www.drgas.com/store/home.php?cat=8

Lots of square/oval tubing and clearanced tubing for tight spots...may come in handy with what you're trying to do.

I've often thought about doing a single low-profile oval straight pipe exhaust out underneath the passenger's door, but a dual setup sounds very ambitious.

Good luck!

 

[Inygknok]

Awesome pictures bowser, a bit over the top though lol. Give my thanks to the guy though!


Anyhow, on to the specific questions that I know my boss will be asking me and nagging about. Have to start taking notes now :nono: :icon_evil


1- In order to help keep the noise down, would it be ok to use just a high flow cat or resonator BEFORE the Y pipe to the 2 exhausts, or will it be extremely necessary to use one in each exhaust pipe AFTER the Y pipe?

2- Looking at the second and third pictures, at about where do you guys think it would be best to insert the Y pipe in order to separate the exhaust? I was thinking about doing it right where the second picture ends and the third picture begins, right at that cut, if not just a few inches (maybe 3") less.

3- I'm a bit concerned about the "Protective sleeve for brake lines and fuel lines" on picture #2. Would it be best, as a preventive measure, to give the 2 exhausts some heat transferring paint (I say both so they match) and some heat wrap?

4- Which places will be perfectly safe to mount up the new support mounts? Don't wanna drill somewhere and then regret it :biglaugh:

5- I was actually going to ask something here in the 5th spot, but I can't find the notebook with the simple drawings I had done with how I wanted to go along with doing this look-wise. I'll install photoshop and try to mess around for a while and see if I can come up with some good edits.

 

[Inygknok]

Found some pics with some of the ideas.

First pic is by far the nicest one, though I would like to re-think the plastic cover around the exhaust (cleaner look maybe). Instead of coming along the side skirt, it comes out somewhere on top of it, but at an angle.

2nd and 3rd pictures are the Roush's. If the first one is too complicated, then these are definately the ones I would love to try out. Only thing I'm not sure about is to either copy the exhaust shape, go with a completely rectangular one, or a circular one.

4th picture is what I have commonly seen all over the place. May be the easiest, but I honestly don't like it at all. Plus, if the car is too low, and thanks to the roads we have in Puerto Rico, it would only take me a week to bend them.

5th pic is just another exhaust I found while googling around. Thought it looked clean, but the ports are too small. Still, maybe a twin exit would be nice? (Bigger of course, or at least circular, not oval shaped).

 

[rsaeini]

my main concern is the clearance.
if you want any type of performance gains the piping needs to be a 3" or bigger with as little bends as possible. that type of exhaust system can be setup for our cars but is it worth the time and money.

just my $0.02

i've always liked the style but i would waste my time trying to fab that up.

 

[Inygknok]

Thanks, I welcome any type of positive criticism ¶

Yet, obviously, I am not doing this as a performance mod, but mostly as a style modification.

Also, I am quite sure that I can go all the way from the back of the turbo, up to the Y-pipe with 3"'s, then separete into the 2 different exhausts using 2" tubing. People might complain, but think about it. Normally we use one single pipe with a 3" diameter, which I am now replacing with TWO, shorter, 2" pipes. The main concern wouldn't even be gases getting stuck, cuz they will have an extra inch of space to go through. The main concern would be the bends, which I know will be the easy part once I figure out all the things I need to watch out (fuel lines, for example).

That's why I'm asking. I know with some positive criticism from fellow members, I might realize something I may have overlooked, or someone else might. :icon_bigg

 

[WeDgE]

Two 2" pipes have less area than a single 3".

 

[Inygknok]

Two 2" pipes in diameter vs one 3" pipe in diameter? When did that happen?


EDIT: Just sat down to think logically..... even took out the measuring tape and starting making drawings. Hold on, I need to draw more lol. Something isn't clicking in my head.

 

[89supturbo]

area of a 2" circle is 3.14" the area of a 3" circle is 7.065", remeber the formula is pi times the radias squared

 

[Inygknok]

area of a 2" circle is 3.14" the area of a 3" circle is 7.065", remeber the formula is pi times the radias squared

I knew I should have bothered doing the proper math :biglaugh:, instead of the lazy math.


Anyhow, I just bothered checking. I could go up to 2 1/4" tubing and would actually have just a tad bit more area than the 3". If I'm doing it correctly at least (with windows calculator, woohoo!).

 

[rsaeini]

i hope you do it and i hope it comes out really good cuz like i said...i've always liked the look of the side exit exhausts.
i'm sure any good quality muffler shop can do this for you.
but i get the feeling you're trying to do this yourself.

it's a pretty simple setup. i think you might need to mount a muffler directly behind the cat/test pipe and run a couple of 45-degree pipes from it to the sides. seems pretty simple.
and as far as the fuel lines are concerned, just make some sort of a heat shield for them and maybe even use some header wrap to protect them.

good luck with the project. keep posting as you progress so we can see.:bigthumb:

side exit exhaust. woot woot. FTW.

 

[Inygknok]

i hope you do it and i hope it comes out really good cuz like i said...i've always liked the look of the side exit exhausts.
'm sure any good quality muffler shop can do this for you.
but i get the feeling you're trying to do this yourself.

it's a pretty simple setup. i think you might need to mount a muffler directly behind the cat/test pipe and run a couple of 45-degree pipes from it to the sides. seems pretty simple.
and as far as the fuel lines are concerned, just make some sort of a heat shield for them and maybe even use some header wrap to protect them.

good luck with the project. keep posting as you progress so we can see.:bigthumb:

side exit exhaust. woot woot. FTW.

Hey! Are you saying I would suck at doing this!?!?!?! :icon_evil






Yeah, I probably do. Lol! I'm not going to be doing the welding or anything though. I might TRY just for the heck of it, but only a piece. I'll let my boss do the rest. Though I know I'll be able to think well when I get down to actually showing my boss and whatever muffler guy we decide to go with to do this.


I was thinking about having the flex I already have, followed by a muffler, and then the Y-pipe. THEN do the 45 degree turns.... depending on how I decide to come out at least. I'm going to play with photoshop tomorrow and see if I can show you guys exactly what I'm trying to go for. The one I got now wouldn't work, need to get it again from my friend tomorrow afternoon.


As for the heat shields, yeah, thought so too. I would definately go with the heat wrap just as extra measures, for the heck of it. Just $25 for a roll.


I am going to try my best at starting this proyect in January. Going to enjoy my vacations first ¶. But I definately need to know exactly what I'm going to be doing, so I'm taking my spare "holy shit, night time and I'm fucking bored" time to take notes ¶.

 

[foreverpsycotic]

if the emissions system in PR is the same as in the US, IIRC you wont be able to keep the exhaust like that for very long. if i remember correctly, the exhaust needs reach the end of the cabin. because we have hatchbacks, it needs to go all the way back.

 

[turbotrev]

im gunna do a single side roush style exhaust that i can just bolt up for racing or shows ill take pics when im doing this so itll take about a week or so depending when i have time so be patient and pics will come soon i hope

trev

ps its not gunna be anything fancy but a tip might go on it

 

[turbotrev]

heres just a quick drawing of what im gunna try





so what do you guys think?????

 

[Inygknok]

if the emissions system in PR is the same as in the US, IIRC you wont be able to keep the exhaust like that for very long. if i remember correctly, the exhaust needs reach the end of the cabin. because we have hatchbacks, it needs to go all the way back.

Don't see what hatchbacks have to do with emissions.....


EDIT: Looking around the local laws to check, so far haven't found anything about this in specific. Just emissions and noise levels. Asked in a local car forum in case someone knows something I haven't found and that my aunt hasn't told me already.

 

[supra90turbo]

Technically, sidepipes are illegal on a passenger vehicle unless the exhaust outlet is behind the passenger compartment. That's why it's legal on trucks to do, since it's typically a good distance after the cab.

Oh, but it IS legal on a car if the car was manufactured with the exhaust. Car companies can get away with it, we can't.


for the sidepipe, may I suggest:
www.burnsstainless.com of course!

for the most ground clearance possible while retaining a proper pipe i.d.

 

[Inygknok]

Technically, sidepipes are illegal on a passenger vehicle unless the exhaust outlet is behind the passenger compartment. That's why it's legal on trucks to do, since it's typically a good distance after the cab.

Oh, but it IS legal on a car if the car was manufactured with the exhaust. Car companies can get away with it, we can't.


for the sidepipe, may I suggest:
www.burnsstainless.com of course!

for the most ground clearance possible while retaining a proper pipe i.d.

Not worried about ground clearance cuz I'm not going to mount it up UNDER the side skirt. Read through all of the other posts :icon_razz

Just checked in the local forum, and one of the members that is actually a cop (an honest one at that, would who have known) replied to me. Apparently it's exactly as I have read numerous times (dad was a lawyer, as well as my grandpa and my aunt) in law books and such. At least here in PR, we aren't as strict. The law itself states that the important thing is that I have the full system: cat, flex, resonator, and muffler. Already got the flex and I'm sure I can modify my current muffler. I can just go ahead and get another cat and place it where the original first cat goes. As for the resonator..... I'll check and see what I can get away with.


Cops here don't have ANY type of instrument to measure the dB's my car is producing, so I know that if I have at least most of the things installed, pass my emissions, and the car isn't noisy as hell, I'll be just fine. Again, the law states that we just can't modify the exhaust to produce noise. Then again, if they don't have a meter to check what "noise" I am producing, and my car isn't obnoxiously loud, I am fine then.


So it looks like I'm completely ok to go with this :icon_razz :icon_bigg


*HIGH FIVE! ::w00t:: :boink:

 

[rsaeini]

may i suggest using this muffler...it's half way down the page on the left, title says "SINGLE / DUAL"
http://www.magnaflow.com/02product/shopdisplaycategories.asp?zone=main&id=303

it's got a single 3" inlet and dual 2.5" outlets. seems to be perfect for your project.