C_A_D88

do NOT do it this way lol

BlackLsCoupe

iTrader: (4)

had it on mine cut muffler off had a guy duel pipe it from there was set up and back so it didnt look ugly. got better gas milage

C_A_D88

only thing is you gotta cut your bumper to have the exhaust cutout to make it look factory

jdgpuller

did you see the way mine was done on my cobalt

C_A_D88

yea looks decent

strykr

As long as you do it right, itll look good and WONT loose back pressure.. look at the 01+ 2.0L neon's they actually look nice and GAIN power going from stock exhaust to the dual exhaust, and the 2.0L are NA (if someone is curious (granted they are sometimes modded to turbo setup))

But like I said.. if you do it right it can look nice and wont loose power. If I was to do it, id get a SS rear bumper that has dual cutout and have the exhaust run to a muffler and on the output side have it dueled..


This is what is on the Neon R/T's, I actually miss having mine it sounded very nice!


EDIT: C A D88, have you been to the Highway 7 meets in Vaughan ON? I think ive seen your car before..

ecot3c inside

iTrader: (11)

you do NOT lose power! there is only a cat-back non-true dual exhaust here folks!! It should be fine. do w.e you want. just not that autotrader one ^ **** looked like it was going cross country skiing

N1ckateen

iTrader: (1)

The master has spoken

Acey

iTrader: (3)

...says you. Of course, the high rise doesn't help.

Aye... and more relevant would be this car, given it has an L61

jdgpuller

both tips are hooked up and sounds great

Dart_SI

iTrader: (1)

im putting dual exhaust on my ss/tc this march. already have all the parts and everything. SLP dual outlet. hope it sounds good. all i gotta do is get the flange changed and take my rear lip to a body shop so they can cut out the other side perfectly. i could do it myslef but i want it to look good. lol.

jonxxxedge1

it dosent come like that stock then. if you look under the car, the right tip is just bolted there, and the stock muffler flows into the left tip

C_A_D88

no i havednt been to the meets yet but you may have seen me around tho

jdgpuller

not any more i upgraded the exhaust to 2.5 inch and a thrush welded series muffler and hooked both exhaust tips up and your right its not factory

newt

iTrader: (2)

Back Pressure is a old myth. The perfect exhaust system has LITTLE to ZERO back pressure.

People are confusing back pressure with exhaust velocity.

If you lose exhaust velocity you will lose power....end of story....nothing to do with back pressure.


That being said, I have a L61 in my sunfire, its open header (dumps to atmosphere where the cat used it be) and it made (dyno proven, with sheets to prove it) 9whp and 15wtq over my 2 1/4 exhaust with a straight through muffler.

And no, I didn't lose any "low end power" either. It makes more HP/TQ from 2000rpm to redline with the open header.

So please don't try and tell me, or other people on this site, that simply running a dual muffler on your car will lose power because you will lose back pressure.


A closed mouth collects no feet....

....Something some of you should think about before posting sometimes.


Sorry, this is one topic that bugs the hell out of me!!

cfcobalt

i have dual exhast on my LT

(before i went wingless)

BlackLsCoupe

iTrader: (4)

whats wrong with the high rise? and i got lots of people at the car shows that loved the duel exhaust and it sounded good to.

ECaulk

iTrader: (6)

finally someone who has actual evidence to back up. I do believe you but i wouldnt mind seeing the dyno sheets, and what changes you've done between them (trying to decide what direction to go with my l61)

newt

iTrader: (2)

Dyno runs where done back to back. Full exhaust first, open header second (I have an electric cut-out).

I'll post the sheet tomorrow

ECaulk

iTrader: (6)

Nice, thanks

newt

iTrader: (2)

As promised.

ECaulk

iTrader: (6)

Thanks, finally can end the myths and rumors

padlock

iTrader: (9)

this is worth quoting so everyone sees it again!

newt

iTrader: (2)

haha I had this same argument with people over at J-Body.org, I used to run at the track with the exhaust open and got better times. No one would believe me that the open header would make more power, so on the next dyno day I decided to try both so I could prove it.

The people that did believe me argued that I would lose to much low end TQ to make it worth while. Aside from the fact when you drag race you never really use any low end TQ since the RPM's don't drop enough between shifts. As you can see I didn't lose ANY low end TQ, I actually gained some.

Keep in mind tho, that if you do want to run open header there is a bit of a science behind it. Google "collector extensions" you need a distance of pipe beyond the collector in order to gain power.

The biggest gain is mid-range TQ and as you can see by the graph that is where it gained the most power.


Just trying to help disspell some myths....nothing erks me more than misinformation....lol

08ssedan

iTrader: (1)

I can think of plenty of 4 cylinder cars that come with a dual exhaust from the factory. Lol