Noweeds pop - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

lbheat · 04-08-2014, 10:20 PM

I know its a stupid question but those with Noweeds do you guys get a rumble pop during decceleration? Lets say if im cruising at 50 mph and i lay off the gas to slow down for a red light i get that pop coming from diverters. It doesnt bother me, i actually love it because it sounds like the race cars going into a turn. Would it be the same concept like my corsa catback when i do a non-cold start? My wife hates it, she says the car is going to blow up lol

Deke736 · 04-08-2014, 10:40 PM

Mine does it and I like it too. Actually, with headers and my NPP exhaust open it does it too. I believe it's caused by the reduction in back pressure caused by the deceleration. Not sure about the Corsa comparison even though I did have a Corsa car back on my C5 Corvette.

revived · 04-08-2014, 10:58 PM

Completely normal, you can still hear the popping ( sounds like backfiring) when you close the cutouts aswell i dont like it myself but it sounds cool i guess.

You never noticed it? I could hear this even with full oem exhaust equipped

lbheat · 04-09-2014, 08:50 AM

Quote:

Originally Posted by Deke736

Mine does it and I like it too. Actually, with headers and my NPP exhaust open it does it too. I believe it's caused by the reduction in back pressure caused by the deceleration. Not sure about the Corsa comparison even though I did have a Corsa car back on my C5 Corvette.

Damn i cant even imagine how crazy loud yours is with headers. When I have them 100% open, everything in the damn car shakes. I need to have my wife drive it and see how it sounds WOT or even cruising with 100% open.

lbheat · 04-09-2014, 08:53 AM

Quote:

Originally Posted by revived

Completely normal, you can still hear the popping ( sounds like backfiring) when you close the cutouts aswell i dont like it myself but it sounds cool i guess.

You never noticed it? I could hear this even with full oem exhaust equipped

I figured it was fine since it doesnt run rough or anything. I honestly never noticed the backfire, I guess since the diverters are right next to my ear I can hear it now. Too much loud music damaged my hearing!

Apex Motorsports · 04-09-2014, 10:18 AM

It is caused by the Deceleration Fuel Cut Off (DFCO) feature in the factory tuning. It is very common with pretty much any exhaust system that is more aggressive than stock. You can get rid of it with a tune.

jeepguy_1980 · 04-10-2014, 06:22 PM

Quote:

Originally Posted by lbheat

Damn i cant even imagine how crazy loud yours is with headers. When I have them 100% open, everything in the damn car shakes. I need to have my wife drive it and see how it sounds WOT or even cruising with 100% open.

I've got headers and cats. I love my NOWEEDS. Just wish I never wasted money on the QTP cutouts.

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04-08-2014, 10:20 PM	#1
lbheat Echale Gas [COTW 3/10/14] Drives: 2010 Camaro SS/RS Supercharged Join Date: Aug 2010 Location: La Puente, Ca Posts: 1,372	Noweeds pop I know its a stupid question but those with Noweeds do you guys get a rumble pop during decceleration? Lets say if im cruising at 50 mph and i lay off the gas to slow down for a red light i get that pop coming from diverters. It doesnt bother me, i actually love it because it sounds like the race cars going into a turn. Would it be the same concept like my corsa catback when i do a non-cold start? My wife hates it, she says the car is going to blow up lol __________________ Kenne Bell 502 rwhp/ 471 rwtq at 9psi (daily driver...for now) Performance: Corsa catback, JRE Super Tensioner, dual pass heat exchanger, R1 slotted & Dimpled rotors cryogenically treated Cosmetic: Giovanna kilis 22", zl1 mailslot bumper, Custom Emblem Pro Badge, painted calipers

04-08-2014, 10:40 PM	#2
Deke736 COTW 12/3/12 Drives: 2012 Ashen Gray ZL1 Join Date: Aug 2011 Location: Glen Carbon, IL Posts: 3,279	Mine does it and I like it too. Actually, with headers and my NPP exhaust open it does it too. I believe it's caused by the reduction in back pressure caused by the deceleration. Not sure about the Corsa comparison even though I did have a Corsa car back on my C5 Corvette. __________________

04-08-2014, 10:58 PM	#3
revived Vrrrm. Drives: 2011 2SS/RS LS3 Join Date: Jun 2013 Location: MA Posts: 1,495	Completely normal, you can still hear the popping ( sounds like backfiring) when you close the cutouts aswell i dont like it myself but it sounds cool i guess. You never noticed it? I could hear this even with full oem exhaust equipped __________________

04-09-2014, 10:18 AM	#6
Apex Motorsports Drives: 2000 Camaro SS Join Date: Feb 2010 Location: Louisville, Ky. Posts: 25,179	It is caused by the Deceleration Fuel Cut Off (DFCO) feature in the factory tuning. It is very common with pretty much any exhaust system that is more aggressive than stock. You can get rid of it with a tune.