L99 Exhaust - Page 3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

sad54189 · 08-19-2010, 03:40 PM

I have a JBA catback on mine and you can hear it when it changes but it is not bad. I don't even really notice it anymore.

Mac the Knife · 08-19-2010, 04:46 PM

Tom P - If time allows meeting and a cruise sounds good, have family in Greenwood. PQ - yes AFM does kick back in quickly, its that 1/2 to 1 second pause thats really annoying and troublesome to compensate for when your already ahead of the response time. and to say again that backfire was really upseting, hard to descibe but,a long hesitation from pressing lightly on throtle and then BANG. pissed me off, AFM is gone!

*mlee* · 08-19-2010, 04:48 PM

Quote:

Originally Posted by PQ

I can't go. Wish I could.

I'm good then.

Except you don't have ARH and can't get the free fuse cover...

SGOS252382 · 08-19-2010, 04:55 PM

L99 A6
Reasons a tune is a must in my book.

1. AFM - extremely annoying (makes a V8 sound like a VW Rabbit at certain rpms).
2. Transmission Tune - (makes the car drive and feel completely different).
3. More power and torque (especially at lower rpms because of reduction in torque management).

JS · 08-19-2010, 05:23 PM

I have the AFM turned off so my post is kinda skewed but.......

I have this setup and its absolutely perfect

2 Magnaflow 10416 Mufflers (Welded into a COMP AXLEBACK)
1 Magnaflow 14386 Resonated X-Muffler (Welded into a 2.5" midpipe)

The car sounds deep with no drone
Driving around town it sounds perfect
Loud when your on it but not to the point its too loud

I am still debating on headers w/cats OR just going JBA cat pipes
I had a set of JBA cat pipes but a friend is taking them for his car

I just cant make up my mind if I wanna run headers on this car
Honestly I am leaning toward them

shaner74 · 08-19-2010, 05:57 PM

If it's just cat-back you should be fine. The noise/vibration comes into play when you install headers and remove the manifolds along with the vibration dampners. The switch from 4-8 cyl mode causes the motor to shake/vibrate and w/out the dampners that vibration is transferred to the vehicle.

Darth_Emma · 08-19-2010, 09:24 PM

I put in LT headers and a catback exhaust. AFM is TUNED OUT! My fuel economy improved after the tune and HP is WAY better. Do it!

I put in Borla's quietest exhaust. With the LT headers, it still has lots of growl under throttle and when idling. But, the cabin is quiet when cruising.

Express96 · 08-19-2010, 09:40 PM

Mine isn't as bad as some of you have described. The 3" exhaust has a real deep sound and when the AFM kicks in you have to turn up the radio to drown it out. Plus there is a small pipe that runs along side the frame on the passenger side that looks like it comes from the transmission, and even after adjusting (tapping with a rubber mallet) still hits the exhaust when jarred real hard. The exhaust also runs hotter than the stock! I was thinking of putting the stock back on and just changing the rear section to an axle back to keep the look, and also get a better sound. Would the stock pipes with an axle back be any quieter when the AFM kicks in?

ETSPEEDY · 08-19-2010, 10:52 PM

Well, I have read everybody's comments and I will say that my car was completely stock and AFM was hardly noticeable. Then I did a muffler delete and the exhaust was loud but so was the AFM and it did not sound good. I have now put the Borla ATAK axle-back and the AFM is much more manageable but the exhaust is not as loud as I would like. I am thinking of adding an x-pipe and removing the resonator but I am pretty sure the AFM will be annoying again.
Eric

shaner74 · 08-20-2010, 09:51 AM

I should also add that my AFM is tuned out. After a couple thousand miles I can say I lost exactly .7 mpg. I also tuned it out the same time I added a CAI intake, so maybe that contributed to the lower mpg as well. All in all .7 mpg is not nearly enough to justify keeping the AFM. The car is much more enjoyable w/out it.

VictoryMuscleCars · 08-20-2010, 10:34 AM

Quote:

Originally Posted by shaner74

I should also add that my AFM is tuned out. After a couple thousand miles I can say I lost exactly .7 mpg. I also tuned it out the same time I added a CAI intake, so maybe that contributed to the lower mpg as well. All in all .7 mpg is not nearly enough to justify keeping the AFM. The car is much more enjoyable w/out it.

shaner, could you confirm that tuning out AFM voids warranty? I've heard/read a few conflicting opinions.

BTW, I'm finding this to be a very beneficial and informative thread for us A6 folks.

PQ · 08-20-2010, 11:06 AM

Quote:

Originally Posted by mlee

Except you don't have ARH and can't get the free fuse cover...

I couldn't afford ARH. That's for you rich guys. lol

Quote:

Originally Posted by Mac the Knife

Tom P - If time allows meeting and a cruise sounds good, have family in Greenwood. PQ - yes AFM does kick back in quickly, its that 1/2 to 1 second pause thats really annoying and troublesome to compensate for when your already ahead of the response time. and to say again that backfire was really upseting, hard to descibe but,a long hesitation from pressing lightly on throtle and then BANG. pissed me off, AFM is gone!

I'd say les than .1 second. AFTER activation by the pedal. It's absolutely unoticeable.

Quote:

Originally Posted by JS

The car sounds deep with no drone

Not possible. You can't be growling at all times.

I wonder if the drone I'm getting is AFM???

JS · 08-20-2010, 11:27 AM

U can think what u want, I built it and its perfect

NO DRONE WITH A NICE SOUND

08-19-2010, 05:23 PM	#33
JS Drives: 2010 Camaro SS Join Date: May 2010 Location: Phila,Pa. Posts: 557	I have the AFM turned off so my post is kinda skewed but....... I have this setup and its absolutely perfect 2 Magnaflow 10416 Mufflers (Welded into a COMP AXLEBACK) 1 Magnaflow 14386 Resonated X-Muffler (Welded into a 2.5" midpipe) The car sounds deep with no drone Driving around town it sounds perfect Loud when your on it but not to the point its too loud I am still debating on headers w/cats OR just going JBA cat pipes I had a set of JBA cat pipes but a friend is taking them for his car I just cant make up my mind if I wanna run headers on this car Honestly I am leaning toward them __________________ SOLD 2010 Camaro 1SS/A6 12.59@111.31 Magnaflow Magnapack Axleback & Resonated X-Pipe/OBX LT Headers/Airaid Cold Air Kit/Injection Connection Tuned

08-20-2010, 11:27 AM	#41
JS Drives: 2010 Camaro SS Join Date: May 2010 Location: Phila,Pa. Posts: 557	U can think what u want, I built it and its perfect NO DRONE WITH A NICE SOUND __________________ SOLD 2010 Camaro 1SS/A6 12.59@111.31 Magnaflow Magnapack Axleback & Resonated X-Pipe/OBX LT Headers/Airaid Cold Air Kit/Injection Connection Tuned

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08-19-2010, 03:40 PM	#29
sad54189 U.S. Navy Veteran Drives: SS/RS Cyber Grey W/ Black Stripes Join Date: May 2010 Location: West Fort Worth Posts: 146 View My Garage	I have a JBA catback on mine and you can hear it when it changes but it is not bad. I don't even really notice it anymore.

08-19-2010, 04:46 PM	#30
Mac the Knife Drives: 10 ss/rs 13 ram Join Date: Jan 2010 Location: on swing shift Posts: 105	Tom P - If time allows meeting and a cruise sounds good, have family in Greenwood. PQ - yes AFM does kick back in quickly, its that 1/2 to 1 second pause thats really annoying and troublesome to compensate for when your already ahead of the response time. and to say again that backfire was really upseting, hard to descibe but,a long hesitation from pressing lightly on throtle and then BANG. pissed me off, AFM is gone!

08-19-2010, 04:55 PM	#32
SGOS252382 Drives: 2010 Camaro 2SS/RS Join Date: Mar 2008 Location: S.W. Florida Posts: 6,294	L99 A6 Reasons a tune is a must in my book. 1. AFM - extremely annoying (makes a V8 sound like a VW Rabbit at certain rpms). 2. Transmission Tune - (makes the car drive and feel completely different). 3. More power and torque (especially at lower rpms because of reduction in torque management).

08-19-2010, 05:57 PM	#34
shaner74 Drives: 2010 camaro 2SS/RS Join Date: Apr 2010 Location: CT Posts: 58	If it's just cat-back you should be fine. The noise/vibration comes into play when you install headers and remove the manifolds along with the vibration dampners. The switch from 4-8 cyl mode causes the motor to shake/vibrate and w/out the dampners that vibration is transferred to the vehicle.

08-19-2010, 09:24 PM	#35
Darth_Emma Psssssssssshhhhhhhhhhhhh! Drives: under contruction Join Date: Nov 2009 Location: Marysville, Ohio Posts: 12,996 View My Garage	I put in LT headers and a catback exhaust. AFM is TUNED OUT! My fuel economy improved after the tune and HP is WAY better. Do it! I put in Borla's quietest exhaust. With the LT headers, it still has lots of growl under throttle and when idling. But, the cabin is quiet when cruising.

08-19-2010, 09:40 PM	#36
Express96 Drives: 2010 Camaro 2SS/RS Join Date: May 2009 Location: Louisiana Posts: 57	Mine isn't as bad as some of you have described. The 3" exhaust has a real deep sound and when the AFM kicks in you have to turn up the radio to drown it out. Plus there is a small pipe that runs along side the frame on the passenger side that looks like it comes from the transmission, and even after adjusting (tapping with a rubber mallet) still hits the exhaust when jarred real hard. The exhaust also runs hotter than the stock! I was thinking of putting the stock back on and just changing the rear section to an axle back to keep the look, and also get a better sound. Would the stock pipes with an axle back be any quieter when the AFM kicks in?

08-19-2010, 10:52 PM	#37
ETSPEEDY Drives: 2010 Camaro SS Join Date: Jul 2010 Location: New Kent,VA Posts: 41	Well, I have read everybody's comments and I will say that my car was completely stock and AFM was hardly noticeable. Then I did a muffler delete and the exhaust was loud but so was the AFM and it did not sound good. I have now put the Borla ATAK axle-back and the AFM is much more manageable but the exhaust is not as loud as I would like. I am thinking of adding an x-pipe and removing the resonator but I am pretty sure the AFM will be annoying again. Eric

08-20-2010, 09:51 AM	#38
shaner74 Drives: 2010 camaro 2SS/RS Join Date: Apr 2010 Location: CT Posts: 58	I should also add that my AFM is tuned out. After a couple thousand miles I can say I lost exactly .7 mpg. I also tuned it out the same time I added a CAI intake, so maybe that contributed to the lower mpg as well. All in all .7 mpg is not nearly enough to justify keeping the AFM. The car is much more enjoyable w/out it.