Exhaust 'Pop' Question
Thread Starter
Team Owner
Joined: Feb 2003
Posts: 37,329
Likes: 12
From: Plano Texas
CI 6-7-8-9 Veteran
CI-VI Car Show Winner
St. Jude Donor '07-'08-'09-'10-'11-'12-'13
Exhaust 'Pop' Question
Last weekend (when we had decent weather here in Texas) I took the car out for a little run. I first drove on surface (local) streets. Incurred a lot of this exhaust ‘popping’, specifically when shifting between 1-2, 2-3. Made me some what uneasy, not to mention self conscious.
I accelerated onto the freeway (hope the law is not reading this) with a lot of WOT. Ran about 3 miles, then exited.
When I was again on the surface streets the exhaust ‘popping’ was much, much less noticeable.
Any thought on why this occurred?
I accelerated onto the freeway (hope the law is not reading this) with a lot of WOT. Ran about 3 miles, then exited.
When I was again on the surface streets the exhaust ‘popping’ was much, much less noticeable.
Any thought on why this occurred?
Burning Brakes
Joined: Jun 1999
Posts: 1,028
Likes: 0
From: La Jolla, CA
Re: Exhaust 'Pop' Question (AC54ME)
When the engine/exhaust are cold, you can get major popping and even afterfire (loud kaboom: with no cats flames too). This is common. If it bothers you, don't lift on decel such that engine revs load up the car when cold (use the brakes to slow down while in a higher gear). Given all of your mods, this sounds normal. For peace of mind, show or describe the behavior to your tuner.
Le Mans Master
Joined: Mar 2002
Posts: 8,466
Likes: 51
St. Jude Donor '17
Re: Exhaust 'Pop' Question (johnC5)
It is my belief if it is not simply cold air rushing in on decel then the other reason it could possibly pop/backfire is simply the car is cold and running rich.
Race Director
Joined: Dec 1999
Posts: 11,799
Likes: 10
From: Houston Texas
St. Jude Donor '08
Re: Exhaust 'Pop' Question (AC54ME)
I don't know why this occurs, but I sure do miss that pop on my A4. My previous 6 speeds used to pop like crazy on decel. It was music to my ears.
[Modified by CorvetteSS, 4:55 PM 2/28/2003]
[Modified by CorvetteSS, 4:55 PM 2/28/2003]
Racer
Joined: Jul 2001
Posts: 421
Likes: 0
From: Greenbelt Maryland
Re: Exhaust 'Pop' Question (Carsnob)
... pop like cray on decel. It was music to my ears.
I love that sound too. The sound of horsepower.
I love that sound too. The sound of horsepower.
I love it too! We need to form a support group for this! But... isn't this the sound a lot of people call the "motorboat" sound that they try to eliminate with an X-pipe?
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Le Mans Master
Joined: Aug 2001
Posts: 6,213
Likes: 1
From: South Alabama
Re: Exhaust 'Pop' Question (flipm)
...isn't this the sound a lot of people call the "motorboat" sound that they try to eliminate with an X-pipe?
The popping is pretty apparent on the six-speed vs. the A4 while slowing down in gear. Push in the clutch or keep the revs low and you can pretty much get rid of it. Personally I like the popping but put a Magnaflow Xpipe in front of my Stingers to take some of the crispiness out of it. Now it's more like muffled explosions. :thumbs:
Listen to the Corsa's idle versus others...
http://www.jayleone.com/exhausts/
http://www.thx2.net/exhaust.htm
Thread Starter
Team Owner
Joined: Feb 2003
Posts: 37,329
Likes: 12
From: Plano Texas
CI 6-7-8-9 Veteran
CI-VI Car Show Winner
St. Jude Donor '07-'08-'09-'10-'11-'12-'13
Re: Exhaust 'Pop' Question (Cajun75)
To all, thanks for the input.
I have attempted the solutions (rev's) suggested, and find some enhancements.
I have attempted the solutions (rev's) suggested, and find some enhancements.
