Looking for performance exhaust advice

[TUnit80]

Hello all, new to the group, looking for experienced advice. I have a '06 Eclipse GT, 3.8L V6, 6 speed manual trans. Looking to replace the stock exhaust system with something more performance driven with a much 'meaner' tone. Any advice/suggestions for a good fit out there? Looking to upgrade the air intake as well. All advice/suggestions extremely welcomed and appreciated.

[pat_08GT_Spyder]

1st suggestion would be to look just a little ways down from where you posted this thread and you'll find all your answers...
in short,
- Cold Air Intake - Fujita
- Headers - get that stock sh** out and replace with RRE (plug-and-play) or OBX (need a little welding)
- Exhaust - either get a full cat-back, or just a muffler (Magnaflow sounds good)

[midnight07GT]

Intake and exhaust go with buschur racing, i'm ordering both tomorrow : ). And for headers, your best bet is rre.

[Daxenth]

add a few childrens tears to the gas and its like a high octane blend. really works. i do it every time i steal a candy bar from one

[midnight07GT]

^lol

[joeyb]

you aren't going to sound THAT mean or loud w/out headers.

and wttc.

[HOMESLICE]

Speaking of which, does anyone have a good quality sound clip of a gt with RRE headers and the Injen 3 inch exhaust. i'm still debating like hell what to get. either magnaflow which i've heard, or the injen

[Daxenth]

injen! exxpensive but you wont get a tone like that from anyone else

[UVRUGBY]

If you are wanting to go long headers then RIPP, or OBX. But OBX is, like said above, required to do slight mod. if short tube, then RRE. and Dax's tear suggestion. top of the line octane, cant get anything better. maybe a little doritos for chipping the stubborn bugger as well.

[joeyb]

here is long tube headers + 3" exhaust:


(+ the superchargere hum)

[NitroGlisson]

You really need to determine how far you are going to go with your build and that will influence your exhaust choice......like there really isn't any need to go to 3" exhaust unless you are planning on boosting.

[HOMESLICE]

^i know I know, i've asked the question before about the 3" and have gotten the same answer with going with 2.5 and i've said before my long term goal is nitrous 75-100 shot, but with full bolt ons and tune. when i looked at the dyno of Injens exhaust on their website they showed a 9hp gain with i'm assuming factory tune and no CAI/other mods. I understand the 2.5 to 3" loss of power by having too wide but lets say i hit 300 without nitrous (after retune) and 375 with nitrous. which will be better. the 3" to make the 375 mark or the 2.5. I wish i could get a real solid answer of 4 dyno runs. 1 with full bolt ons tune and 2.5 and one same but with 3" and then of course with the nitrous. Its hard to say without knowing

here is the link to Injens Dyno which to me says it doesn't loose as much power as we think
http://www.injen.com/galleries/produ...873TT_dyno.jpg

[Wingo171]

True you will lose power going to 3" instead of sticking with a 2.5". Also, the difference is a response timing, not just power. Your power numbers that you talked about above (300 w/o nitrous and 375 with nitrous) are based off of crankshaft, not wheel HP. You lose about 16-18% of that power in the drivetrain before it hits the wheels. A re-tune could bump you up a bit, but nothing miraculous. So if you hit 300 at the crank, best case scenario you will have less power to the wheels than your stock crank numbers of 263 HP.

[Wingo171]

joeyB, your video shows me that your tune needs fixed so you're not pegged lean when you let off the throttle, your fuel table needs corrected to keep that from happening, cause it could cause a mean backfire if any fuel hangs in your exhaust.

[pat_08GT_Spyder]

Originally Posted by Wingo171

True you will lose power going to 3" instead of sticking with a 2.5". Also, the difference is a response timing, not just power. Your power numbers that you talked about above (300 w/o nitrous and 375 with nitrous) are based off of crankshaft, not wheel HP. You lose about 16-18% of that power in the drivetrain before it hits the wheels. A re-tune could bump you up a bit, but nothing miraculous. So if you hit 300 at the crank, best case scenario you will have less power to the wheels than your stock crank numbers of 263 HP.

most bolt-ons GT's hit 270whp or more, un-tuned... a tune is worth another 15-25whp, depending on the car... not sure where you're getting your numbers...

[boydoobie]

hey there, whats the best exhaust combo for v6 a/t transmission? tia

[HAHA NO]

RRE headers,y-pipe and injen exhaust...sitting at 325-330 to the crank.

[HAHA NO]

Originally Posted by boydoobie

hey there, whats the best exhaust combo for v6 a/t transmission? tia

Choose one and go with it

[TheFootOfGod]

Injen sound on the SES exhaust is wicked. i have it and love it. the sound is deep and at high rpms sounds like sex to me. Im going to be in Chicago on February 17TH for the auto show and will have my car. we meet up and you hear it in person? then decide

[Wingo171]

That's just what I've personally seen while running the dynojet. I've had 4 GT's on the tumblers but even the modded ones weren't hitting 270 to the wheels with exhaust and intake. That's after the correction factors. This was done in central Pennsylvania. Each dyno brand shows different numbers also. Besides, the guys running stage 1 supercharger kits are barely over the 3's to the wheels. An exhaust and an intake do not equal a supercharger.

[joeyb]

^I got a stage one pulley and I'm at 347 at the wheels. that is 400 at the crank. whenever I push the pedal down. of course, you must have it tuned. and I have a stage IV clutch and a LSD in there as well.

[choppertwo]

Sounds so badass Joey-- CHOP

[pat_08GT_Spyder]

Originally Posted by Wingo171

That's just what I've personally seen while running the dynojet. I've had 4 GT's on the tumblers but even the modded ones weren't hitting 270 to the wheels with exhaust and intake. That's after the correction factors. This was done in central Pennsylvania. Each dyno brand shows different numbers also. Besides, the guys running stage 1 supercharger kits are barely over the 3's to the wheels. An exhaust and an intake do not equal a supercharger.

Originally Posted by joeyb

^I got a stage one pulley and I'm at 347 at the wheels. that is 400 at the crank. whenever I push the pedal down. of course, you must have it tuned. and I have a stage IV clutch and a LSD in there as well.

Wingo - are you sure you didnt try to measure whp at the rear wheels

just kidding, but your reference numbers seem low, that's all

[Wingo171]

Those were all numbers I witnessed on the dyno, but as I said, correction factors, and brand and type of dyno's are different. Also, Joeyb, what other mods do you have done other than the supercharger and a tune? (injectors, exhaust, pistons, connecting rods, crankshaft?)

[freakydeaky]

^Joe's Supercharged 08 GT

check his mod list

[Wingo171]

Yes, and the meth. intercooler, diff. and 6 puck clutch all add power to the wheels. the meth intercooler cools down the air, and the diff. distributes power better than stock, as well as loses some drivetrain drag, and the 6 puck clutch is less rotating weight than factory. These mods make a difference over just having a straight supercharger thrown on there.

Sorry for the detour, but I've always known Borla to make the best sounding exhaust for Mitsubishi across all the years and models.

[HOMESLICE]

unfortunately borla does not make a direct catback exhaust for the eclipse. they might have universal piping though. Thanks to hahanos video i think i have my mind made on the injen. Even if it does loose HP I think i will like the sound a whole lot better. I just wanted to make sure it wasn't going to be too loud to make cops aware of my presence even more than the magnaflow with headers.

[HAHA NO]

Originally Posted by HOMESLICE

unfortunately borla does not make a direct catback exhaust for the eclipse. they might have universal piping though. Thanks to hahanos video i think i have my mind made on the injen. Even if it does loose HP I think i will like the sound a whole lot better. I just wanted to make sure it wasn't going to be too loud to make cops aware of my presence even more than the magnaflow with headers.

Unless your gonna drive a cop at WOT, they won't even look at u. You won't be dissapointed. You can have people say the exhaust is to big and loose HP but I haven't seen that, of course they tell say not to race with 20's and I rock that at the track anytime I get a chance. Of course I prob run lower times but there is something about beating a car with 20's that's satisfying.

[joeyb]

Originally Posted by choppertwo

Sounds so badass Joey-- CHOP

thanks Mike. nice of you to say. I'm doing what I can to make the engine bulletproof as we speak.