Popping on deceleration....a question inside.
Thread Starter
Member: Jr Geezer's Club
Joined: Dec 2005
Posts: 2,164
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From: Houston Texas
Popping on deceleration....a question inside.
I have headers going on this Friday at 21st Century Muscle Cars. I have a question with regard to popping (small backfires) on deceleration.
Are the long tubes themselves responsible for this popping, or is it more a function of what cat back system you run?
I have driven a couple C6's with long tubes that have pronounced popping after hi-rpm decel.
Or....is the popping indicative of a lean (or a tune related) condition?
I am getting the LG Pros, along with catted 3" x-pipes out to 3" OEM Z06 mufflers.
Subsequent tune to follow.
Bone
Are the long tubes themselves responsible for this popping, or is it more a function of what cat back system you run?
I have driven a couple C6's with long tubes that have pronounced popping after hi-rpm decel.
Or....is the popping indicative of a lean (or a tune related) condition?
I am getting the LG Pros, along with catted 3" x-pipes out to 3" OEM Z06 mufflers.
Subsequent tune to follow.
Bone
Somba master
Joined: Mar 2005
Posts: 10,554
Likes: 63
Cruise-In 7, 9 & 12 Veteran
Wounded Warrior Escort '11
St. Jude Donor '07-'08-'09-'10-'11
My C6 popped from the time I put on the GHL cat backs with x-pipe.
Putting on the headers later only made it louder. My car was also dyno tuned, so there shouldn't be any f/a issues.
GM
Putting on the headers later only made it louder. My car was also dyno tuned, so there shouldn't be any f/a issues.
GM
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
I like the popping too although I don't have any with my current setup. It can be tuned out/down by enabling/expanding the DFCO range. DFCO would cut the fuel under decel so no fuel to pop.
Le Mans Master
Joined: Oct 2006
Posts: 5,474
Likes: 3
From: Bradenton, FL & Chandler AZ
St. Jude Donor '09
Kooks + Bullets= THE SOUND OF POWER
Lots of popping on deceleration which I thoroughly enjoy! A dyno of my car with O2 bung hooked up showed the AFR to be right on.
Lots of popping on deceleration which I thoroughly enjoy! A dyno of my car with O2 bung hooked up showed the AFR to be right on.
Thread Starter
Member: Jr Geezer's Club
Joined: Dec 2005
Posts: 2,164
Likes: 1
From: Houston Texas
Thanks for the replies gents. I like a little popping too if I"ve been ripping through the gears (but not if my foot had not been into it).
If I'm just putting around I don't want any feedback like that. There's a time and place to everything and sometimes I need stealth mode. Hence the controllable z cans I'm getting.
If I'm just putting around I don't want any feedback like that. There's a time and place to everything and sometimes I need stealth mode. Hence the controllable z cans I'm getting.
Le Mans Master
Joined: Nov 2005
Posts: 6,099
Likes: 64
From: Houston TX
St. Jude Donor '09
Reid,
I don't have any loud popping, but I do now have some burble on decel with my Magnaflow 15886's that I really like.
I think any cat-back that has less restriction than stock will burble, and the really loud, low restriction ones will pop. With headers, going with the stock Z06 system and the cutouts like you plan sounds like a good way to go. You should have some burble from the headers, but I doubt if it will pop loud unless the cutouts are open.
I don't have any loud popping, but I do now have some burble on decel with my Magnaflow 15886's that I really like.
I think any cat-back that has less restriction than stock will burble, and the really loud, low restriction ones will pop. With headers, going with the stock Z06 system and the cutouts like you plan sounds like a good way to go. You should have some burble from the headers, but I doubt if it will pop loud unless the cutouts are open.
Last edited by Indy-hp; Feb 21, 2007 at 12:00 AM.
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Brett Foote
SC CF Senior Member
Joined: Feb 2006
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From: Friendswood Texas
St. Jude Donor '06-'07-'08
Reid,
I don't have any loud popping, but I do now have some burble on decel with my Magnaflow 15886's that I really like. I think any cat-back that has less restriction than stock will burble, and the really loud, low restriction ones will pop. With headers, going with the stock Z06 system and the cutouts like you plan sounds like a good way to go. You should have some burble from the headers, but I doubt if it will pop loud unless the cutouts are open.
I don't have any loud popping, but I do now have some burble on decel with my Magnaflow 15886's that I really like.
I think any cat-back that has less restriction than stock will burble, and the really loud, low restriction ones will pop. With headers, going with the stock Z06 system and the cutouts like you plan sounds like a good way to go. You should have some burble from the headers, but I doubt if it will pop loud unless the cutouts are open.
My corsa sports burble. That is my 2nd favorite thing of the exhaust(1st being acceleration) and 3rd being NO DRONE!!!
Melting Slicks
Joined: Mar 2006
Posts: 2,064
Likes: 4
Corsa's with American racing long tubes.
Pops and gurgles. Awesome. Lets everyone know your coming. To the ill informed, they think you are backfiring.
My tuner explains that is a build up of fuel rich exhaust gases that expand quickly and POP as they exit the exhaust valve when you decelerate.
This is exascerbated by the free flowing exhaust and headers.
Pops and gurgles. Awesome. Lets everyone know your coming. To the ill informed, they think you are backfiring.
My tuner explains that is a build up of fuel rich exhaust gases that expand quickly and POP as they exit the exhaust valve when you decelerate.
This is exascerbated by the free flowing exhaust and headers.
Thread Starter
Member: Jr Geezer's Club
Joined: Dec 2005
Posts: 2,164
Likes: 1
From: Houston Texas
Reid,
I don't have any loud popping, but I do now have some burble on decel with my Magnaflow 15886's that I really like. I think any cat-back that has less restriction than stock will burble, and the really loud, low restriction ones will pop. With headers, going with the stock Z06 system and the cutouts like you plan sounds like a good way to go. You should have some burble from the headers, but I doubt if it will pop loud unless the cutouts are open.
I don't have any loud popping, but I do now have some burble on decel with my Magnaflow 15886's that I really like.
I think any cat-back that has less restriction than stock will burble, and the really loud, low restriction ones will pop. With headers, going with the stock Z06 system and the cutouts like you plan sounds like a good way to go. You should have some burble from the headers, but I doubt if it will pop loud unless the cutouts are open.
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
But then my wife commented yesterday that she likes my new cutouts (real ones) as I tested them out yesterday.
By the way, I don't have much burble with headers through my Magnaflow 14336 mufflers, but with my cutouts open, it is snap crackle and pop. I have DFCO on (factory settings) so I was a little surprised by that.
Le Mans Master
Joined: Mar 2006
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From: Valencia '32 Ford 3 window with 615 HP!!!!
St. Jude Donor '06-'09
Pro
Joined: Dec 2006
Posts: 643
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From: Salt Lake City, UT
Le Mans Master
Joined: Mar 2006
Posts: 7,838
Likes: 1
From: Valencia '32 Ford 3 window with 615 HP!!!!
St. Jude Donor '06-'09
Looks like my twin!
Yeah Bro,I love my exhaust noise,and it may get LOUDER when I add my cam!!!
Pro
Joined: Dec 2006
Posts: 643
Likes: 7
From: Salt Lake City, UT
You'll LOVE the way your car sounds with a cam!
CF Senior Member
Joined: Feb 2006
Posts: 23,313
Likes: 25
From: Tucson Arizona
My setup (Corsa Sports behind LGM long tube headers and the LPE 403 motor) have a great, deep, muscle car sound....no loud popping, no drone and mild 'gurgle' when decelerating.