Custom side exhuast questions (1g AWD)

[HotSauce GS N/T]

Im just wondering besides clearance issues if I am going to have any other problems doing a side exhuast like this one. Im going to order a 2.5" O2 eliminator downpipe, test pipe, $50 dollar cat from napa, 2.5" glasspack, 2.5" to (2) 1.5" adaptor, (2) 1.5 " mandrel bends (45 degree i think), and 2 straight thru pipes. I might add some bling bling tips but im not sure . What im wondering deals with the back pressure. Am I going to have too much, too little, or wont it matter that much? Im going to be running a 16g turbo and I dont want to increase spool up time. Anyone else who has done this tell me what you think....

edit: im only going to be installing the cat for inspection/emission purposes, 99.9% of the time the test pipe will be used

 

[Bigglesworth87]

Turbo cares usually use 3" piping and not 1 1/2 inch. Thats like stock Honda CRX exhaust size piping. Backpressure is not much of an issue for turbo cars as much as a N/A car would need. So keep that in mind. Also, the legality of this exhaust should be taken into consideration.

 

[silver eclipse]

If you ever want to run in a IHRA, SCCA, etc. You have to have the exhuast exiting behind the rear wheel. I would take that into consideration if you want to race in any major event. I would also run 3"the whole way thru for sppol time and its less work on the turbo.
-Chad

 

[L2RTSiAWD]

If you ever want to run in a IHRA, SCCA, etc. You have to have the exhuast exiting behind the rear wheel.
-Chad

Then why to all the Rolex cars and JGTC cars have the exaust exit before the rear wheel.

I'm not trying to argue it just doesn't make sense the rules would be different. I know it's 2 completely different classes of racing.

 

[kicker91laser]

Correct me if I am wrong, but wouldn't it be wiser to run it out the driver's side, because you would have to run it under the driveshaft otherwise. I think it will work out OK, as long as you don't lower your ride height

 

[SethA]

If you ever want to run in a IHRA, SCCA, etc. You have to have the exhuast exiting behind the rear wheel. I would take that into consideration if you want to race in any major event. I would also run 3"the whole way thru for sppol time and its less work on the turbo.
-Chad

I think was going to split a single 2.5" into dual parallel 1.5" pipes after the cat/test pipe. Even at that I agree with you that they would be a significant restriction. A 2.5" pipe has a cross sectional area of 4.9 sq in vs the 2x 1.5" area of 3.5 sq in.

Seth

 

[boosting_laser]

Regarding legallity issues, from what I understand your exhaust must exit behind the last door of the vehicle (like the Mustang Cobra). I haven't been pulled over so far (knock on wood)

It would probably be easier to have it exit on the driver's side. At least that's how RRE did on their race car. Good luck!!

 

[Burnett03]

Im just wondering besides clearance issues if I am going to have any other problems doing a side exhuast like this one. Im going to order a 2.5" O2 eliminator downpipe, test pipe, $50 dollar cat from napa, 2.5" glasspack, 2.5" to (2) 1.5" adaptor, (2) 1.5 " mandrel bends (45 degree i think), and 2 straight thru pipes. I might add some bling bling tips but im not sure . What im wondering deals with the back pressure. Am I going to have too much, too little, or wont it matter that much? Im going to be running a 16g turbo and I dont want to increase spool up time. Anyone else who has done this tell me what you think....

edit: im only going to be installing the cat for inspection/emission purposes, 99.9% of the time the test pipe will be used

1 1/2 inch piping?

 

[mntalon_05]

wouldn't it be cheaper and less restrictive to just run 2.5" or 3" all the way through and then if you want the dual tip look, just put a split tip at the end? just a thought. I've kinda thought about having an exhaust setup like this to throw on on the weekends sometimes. I have a nearly unlimited supply of exhaust piping for quite cheap though thru work, so I can do a little trial and error without it costing much.

 

[silver eclipse]

I dont want to argue either, but i was reading the rules and classes for the IHRA in all the street classes I believe you had to have the exhaust exit behind the rear wheel or stock location (like if it comes out the side stock).
As for the local laws about the exhaust, when it comes to cars if you dont get cought its not illegal
-Chad

 

[LaN-]

are you only goin to have 2 pipes on that one side?

i say do it on both (idk how good it would look but at least its differnent)

on trying something new

 

[LA97GST]

are you only goin to have 2 pipes on that one side?

i say do it on both (idk how good it would look but at least its differnent)

on trying something new

That would be the worst performance minded mod iI have ever heard (besides the hair-dryer blower).

 

[MIdsm]

You may want to look into the following exhaust components by Boyce.

http://www.boyceindustries.com/oval-exhaust-system-components.html

Good luck,

Stevan

 

[HotSauce GS N/T]

i tried to draw the driveshaft in the picture... it might be on the wrong side??? OK well here is the reasoning behind the whole exhaust. I saw a pic of an srt4 on the cover of Sport Compact Car or maybe Super Street (ya I read all the ricer mags) with side exhaust and it looked awesome. I figured side exhaust would be easier and less restrictive. I am NOT going to be competing in ANY racing!!! I dont have any ambition to race because I dont have money or the time. With that said and the local laws around me will allow side exhaust I'm pretty set on a side exhaust. I dont want to bend it around the drive shaft and I figured so clearance issues splitting the exhaust BEFORE bending it 45 degrees would be most logical (picture below) I guess the consensos would be to run 3" downpipe and maybe dual two inch outlets?? I am really gonna do this and soon because i got way too much back pressure right now

a single 3" outlet would require 3" of clearance to run under the outside of the underbody
a dual 2" outlet ran side by side would only require two inch's of clearance

ps. MAD MS PAINT SKILLZ YOOO!!!!!

 

[MIdsm]

If you look at the above posted web page and scroll down to the 3" exhaust oval piping you willl notice that the oval pipe dimensions are 3.5"wide by 2.125" tall. You would have to get the adapter piece that is round on one side and oval on the other side. After that you could use oval elbows and tail pipe.

Good luck,

Stevan

 

[UMR98GSX]

Most local laws regarding side exit exhausts mandate that the exhaust exit behind the B pillar of the vehicle so in our case right behind the door. I suggest that you go with the oval components too... maybe a little pricey but definitely unique... the babes will be all up ons

 

[Project ES]

Im not bashing the idea of side ecit exhaust cuz i actually like it but has anyone seen what exhaust fumes will do to your wheel that it blows across over time? Different vehicle but i had a 97 f150 that came stock w/ side exit exhaust in front of the wheel and that wheel on that corner was all turning green and totally discolored from the other 3. Maybe it was from the previos owner not taking care of them, even though the other 3 looked almost new. Like iI said though, Im not bashing the idea, jus wanted to add this to the thread.

 

[HotSauce GS N/T]

so from what imm gathering a 3" downpipe, no cat, glasspipe and 2 straight pipes (oval or non) would be a perfectly good setup performance wise?

 

[LA97GST]

sure won't be as good as straight 3 inch pipe out back but wouldn't be too bad. Plus it would be unique. Go for it man i support you.

 

[JiveMasterT]

i thought the straighter the exhaust, the better? why not just run a 3 inch straight back? i mean, sure the side exit exhaust looks cool, but the problems associated with it are just too much for me.

case in point... my dad's friend at work didnt turn off his car while sitting in trafffic with his viper and the paint along the bottom where the pipes run started to bubble from the heat... it's just stuff like that that makes them not worth it in my book.