muffler delete

[ukrms6]

just got my mufflers taken off and replaced with straight pipes. I like the sound, but cant really feel a difference in power, that's why im thinking of putting on a test pipe. is this is a good idea?? anyone has this setup? any info is appreciated..

[Moody]

you wont find any gains until you get a downpipe, test/race pipe, or full turbo-back exhaust. This way the exhaust has no restrictions when exiting the vehicle. Deleting mufflers and resonators only changes the sound of the exhaust.

[Lil_vicious559]

just got my mufflers taken off and replaced with straight pipes. I like the sound, but cant really feel a difference in power, that's why im thinking of putting on a test pipe. is this is a good idea?? anyone has this setup? any info is appreciated..

You're going to notice a lot of smoke and you might need to run thicker oil when it happens. When changing any exhaust part of the car, the turbo seals start to smoke and tend to go bad.

As far as you're test pipe. Yes you can feel a little bit of power difference! I noticed my 3rd gear on up, pulls a little better.

You can get the 2.5" or 3" test pipe. I'd go with the 3"

[ukrms6]

You're going to notice a lot of smoke and you might need to run thicker oil when it happens. When changing any exhaust part of the car, the turbo seals start to smoke and tend to go bad.

As far as you're test pipe. Yes you can feel a little bit of power difference! I noticed my 3rd gear on up, pulls a little better.

You can get the 2.5" or 3" test pipe. I'd go with the 3"

you smoking yet?

[Lil_vicious559]

you smoking yet?

Nope, i was! Took it in to the dealer and had the Turbo replaced under warranty! I was running straight pipe for awhile and that's when the turbo seals started smoking. So i bought a pair of (Dynomax) Super Turbo mufflers after turbo was replaced

[ukrms6]

Nope, i was! Took it in to the dealer and had the Turbo replaced under warranty! I was running straight pipe for awhile and that's when the turbo seals started smoking. So i bought a pair of (Dynomax) Super Turbo mufflers after turbo was replaced

straight pipes instead of mufflers, or cat? or both?

[Lil_vicious559]

straight pipes instead of mufflers, or cat? or both?

1.)I removed the stock exhaust and ran straight pipes from there.
2.)Car started smoking turbo seals were bad
3.)Got turbo replaced under warranty
4.)While turbo was replaced i ordered The Mufflers
5.)Couple days later after i got the car back, i Received my mufflers
6.)after work the next day i put the Mufflers on

[ukrms6]

1.)I removed the stock exhaust and ran straight pipes from there.
2.)Car started smoking turbo seals were bad
3.)Got turbo replaced under warranty
4.)While turbo was replaced i ordered The Mufflers
5.)Couple days later after i got the car back, i Received my mufflers
6.)after work the next day i put the Mufflers on

my questions is , do u think th test pipe caused it or mufflers being removed or both?

[Lil_vicious559]

I can't give you an exact answer for that ? I know i was running PG test pipe and MS CAI. My car never smoked or for that matter leaked any oil!!

I noticed after running straight pipes a few days later my car started smoking and read up on how the Turbo seals tend to go bad and cause this. By dumping too much fuel and running to lean can cause this, but you can run thicker oil and should help by what other forum members have said n done.

[tunersteve]

You're not guaranteed to smoke with the removal of the cat and mufflers. It's a pretty good correlation that you might though.

Right now, there are several variations of turbos out there. There are 3 known models (original and 2 revisions), but the details are not clear as to what has been changed with each.

Cobb has been very adament in saying that removing major levels of back pressure (i.e. catless DP) is bad for the turbo and can result in overboosting. I would strongly recommend that you check your turbo model (rev. C is what you want) and keep an eye on your exhaust after a 15-20 min. idle at operating temps. Do this before and after you install an exhaust mod.

The test pipe install did make the car a little more responsive to throttle, and the boost seems to spool up quicker once you get into it. The tone is a little raspier than stock, but nothing obnoxious. Most people won't even notice a difference.

[ukrms6]

You're not guaranteed to smoke with the removal of the cat and mufflers. It's a pretty good correlation that you might though.

Right now, there are several variations of turbos out there. There are 3 known models (original and 2 revisions), but the details are not clear as to what has been changed with each.

Cobb has been very adament in saying that removing major levels of back pressure (i.e. catless DP) is bad for the turbo and can result in overboosting. I would strongly recommend that you check your turbo model (rev. C is what you want) and keep an eye on your exhaust after a 15-20 min. idle at operating temps. Do this before and after you install an exhaust mod.

The test pipe install did make the car a little more responsive to throttle, and the boost seems to spool up quicker once you get into it. The tone is a little raspier than stock, but nothing obnoxious. Most people won't even notice a difference.

thanks for the helpful info! i actually checked if im smoking without the mufflers, and thankfully im not. I'll check again when i put on the test pipe and will let you guys know. BTW how do i find out if i have the rev. c?

[1quickturbosix]

thanks for the helpful info! i actually checked if im smoking without the mufflers, and thankfully im not. I'll check again when i put on the test pipe and will let you guys know. BTW how do i find out if i have the rev. c?


Yea... how can you tell what revision you have?

[Qwik6]

I have one of the early production ones. Turbo doesnt smoke even with the test pipe.

You do not want to run a test pipe with the axle back. I had the axle back setup before the tp and it sounded nice. After the tp it was ungodly loud. And not in a good way. Put magnaflow mufflers back on and its just a little bit queiter than with the axle back and cat. Has a nice tone to it.

[tunersteve]

thanks for the helpful info! i actually checked if im smoking without the mufflers, and thankfully im not. I'll check again when i put on the test pipe and will let you guys know. BTW how do i find out if i have the rev. c?


Yea... how can you tell what revision you have?

From what I've found, the earliest the rev. C turbos were installed was Sept. 2008.

[ukrms6]

I have one of the early production ones. Turbo doesnt smoke even with the test pipe.

You do not want to run a test pipe with the axle back. I had the axle back setup before the tp and it sounded nice. After the tp it was ungodly loud. And not in a good way. Put magnaflow mufflers back on and its just a little bit queiter than with the axle back and cat. Has a nice tone to it.

really i put on a test pipe and i think it sound awesome! ecpeciallly the roar in higher geears when you reach about 3500 rpm...it sounds almost like an 18 wheeler lol thats an exaggeration..

[djdanny5000]

I would say get a test pipe but if you're still running the stock downpipe and stock catback i wouldnt recommend the 3". I say stick with the 2.5" test pipe. I'm actually going to be installing a downpipe and will have a 2.5" TP up for sale pretty soon

[amilliems6]

so you wont smoke with a test pipe right?

[Qwik6]

really i put on a test pipe and i think it sound awesome! ecpeciallly the roar in higher geears when you reach about 3500 rpm...it sounds almost like an 18 wheeler lol thats an exaggeration..Exactly. To be exact it sounds just like a cummins diesel pickup with the exhaust stacks going up the back. The sound drones. Its ok but draws too much attention.

[ukrms6]

Exactly. To be exact it sounds just like a cummins diesel pickup with the exhaust stacks going up the back. The sound drones. Its ok but draws too much attention.

yea its not to bad unless you go into boost.. btw does the upgraded tip help a lot?

[ukrms6]

so you wont smoke with a test pipe right?

i dont

[Qwik6]

yea its not to bad unless you go into boost.. btw does the upgraded tip help a lot?

The turbo seemed to like it.

[amilliems6]

i dont

does anyone else not smoke with the TP?

[djdanny5000]

istarted smoking when i installed my test pipe. I beleive most people do

[ukrms6]

istarted smoking when i installed my test pipe. I beleive most people do

so what you do? get it fixed or what?

[Qwik6]

Had mine on 2 months. No smoking. I did just switch to amsoil 5w-40 on saturday.

[ukrms6]

Had mine on 2 months. No smoking. I did just switch to amsoil 5w-40 on saturday.

why did you switch if you didnt smoke?

[djdanny5000]

so what you do? get it fixed or what?

Yeah i took it to the dealership and told them there was smoke coming out of the exhuast. Left there and they called me up to let me know i was getting a new turbo.

[Qwik6]

why did you switch if you didnt smoke?

To stop it from starting. Plus im more comfortable running a thicker oil now temps are warming up and im running 19psi of boost.

[tunersteve]

Noone ever said you couldn't run that 5w-40 as a precaution. Depends on your situation. Most people seem to do it as a reactive response to smoke, while others will do it as a preventative (hopefully) attempt to avoid smoking.

I did run 5w-40 for almost the first year I had the car, but found that it smoked anyways in my particular case, so I've been running 5w-30 since without issues.

[ukrms6]

To stop it from starting. Plus im more comfortable running a thicker oil now temps are warming up and im running 19psi of boost.

wow 19 psi.. what did you upgrade to run that high of a psi?? is it safe?

[Qwik6]

My mods are in my sig. Running the Cobb Stage 2 map targets the boost at 18.5. Depending on temps it will hold anywhere from 16-19.6 psi. Seems to be safe. No high knock retard. AFR's look good and ltft's are perfect. I do not experience cut of any kind and never had. Even on my stock fuel pump and hitting 19.6 I do not hit fuel cut nor boost cut. I usually check my car once a month for any boost leaks to be on the safe side. Upgrading all the clamps on the boost tubes to t-bolt clamps is a must.