Deceleration pop - Page 3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

uniqueskillz · 07-24-2012, 06:54 PM

Quote:

Originally Posted by PQ

I gotta have my pops.

ihaveacamaro · 07-24-2012, 08:04 PM

Quote:

Originally Posted by UNDsioux

Can u hear it with the windows down?

yes I can

Blitz · 07-24-2012, 08:11 PM

Headers and LMII here and the "Pop" is plenty loud, but I love it! I have actually seen people walking on the sidewalk in my neighborhood jump.

hightower · 07-24-2012, 09:10 PM

As others have said, yes, and I love it!

Dan1028 · 07-24-2012, 09:19 PM

Quote:

Originally Posted by PQ

I gotta have my pops.

Maxspeed · 07-25-2012, 07:10 AM

I think mine doesn't more since my CAI and Corsa.

1954 Belair-man · 07-25-2012, 07:16 AM

Oh yeah

10forty2 · 07-25-2012, 07:26 AM

Quote:

Originally Posted by Bell040

its called DFCO.... deceleration fuel cut off. The PCM commands the fuel to 0 flow, and you are completely lean when tranny can pull the crankshaft by itself. This is to save gas. You can turn off DFCO in the tune.

once the fuel makes it out completly of the system it this popping stops... but when you are above ~16 AFR but still in the combustible range ...... the fuel waits to ignite until it gets in the hot exhaust...... hence the "pop"

Yep!! Caused by a lean condition. And when you add free-flowing pipes and intakes it causes the engine to be even more lean, and hence the pop. What you're sacrificing for that pop is a bit of power since the engine is now starving for fuel. You got it breathing right, now ya gotta give it some more fuel to compensate for all the extra air it's getting.

dkg11 · 07-25-2012, 07:27 AM

exhaust cut outs= lots of decal pop

Nvincent4708 · 07-25-2012, 07:28 AM

Quote:

Originally Posted by Bell040

its called DFCO.... deceleration fuel cut off. The PCM commands the fuel to 0 flow, and you are completely lean when tranny can pull the crankshaft by itself. This is to save gas. You can turn off DFCO in the tune.

once the fuel makes it out completly of the system it this popping stops... but when you are above ~16 AFR but still in the combustible range ...... the fuel waits to ignite until it gets in the hot exhaust...... hence the "pop"

perfect post!

I tuned this out on my car.

SinisterEcho · 07-25-2012, 07:30 AM

Quote:

Originally Posted by Bell040

its called DFCO.... deceleration fuel cut off. The PCM commands the fuel to 0 flow, and you are completely lean when tranny can pull the crankshaft by itself. This is to save gas. You can turn off DFCO in the tune.

once the fuel makes it out completly of the system it this popping stops... but when you are above ~16 AFR but still in the combustible range ...... the fuel waits to ignite until it gets in the hot exhaust...... hence the "pop"

Never knew that. You learn something new every day

GlennP · 07-25-2012, 07:31 AM

Quote:

Originally Posted by Nvincent4708

perfect post!

I tuned this out on my car.

You tuned the cut off out or the decel pops?

That would be awesome tuning out the cutoff, because it would just pop the whole time you are in the gear at 0 throttle correct?

Cody6.2 · 07-25-2012, 07:37 AM

I'm part of the hate DFCO noise crowd.

During our last local cruise night I went muffler free and there was plenty of popping to go around. I knew the popping was a bit much when I overheard a crowd of spectators mutter what the f*#@ is wrong with that Camaro.

CUONCRS · 07-25-2012, 09:35 AM

I don't dig the decel pop that much, but the acceleration sound is worth anything that comes with it! I love my muffler delete. Everything else is stock.

Before and after:

07-24-2012, 08:11 PM	#31
Blitz Drives: 2012 CTS-V Sedan Join Date: Feb 2011 Location: Charlotte, NC Posts: 739	Headers and LMII here and the "Pop" is plenty loud, but I love it! I have actually seen people walking on the sidewalk in my neighborhood jump. __________________

07-24-2012, 09:10 PM	#32
hightower LS3 Black Widow Drives: 2012 45th 2SS LS3 and 1968 Mustang Join Date: Nov 2011 Location: Madison, GA Posts: 4,557	As others have said, yes, and I love it! __________________ My Camaro Story

07-25-2012, 07:10 AM	#34
Maxspeed ~COTW 6/30/14~ Drives: 2011 Camaro SS/RS Join Date: Oct 2011 Location: Mansfield Mass Posts: 2,906 View My Garage	I think mine doesn't more since my CAI and Corsa. __________________ Mods: Heritage Grill, Blade Spoiler, Corrado Hoodliner Mural, Premium Engine Boxes, Radiator Shroud, Custom Painted Bowties, Dipstick & Engine Caps, RX Catch Can, Corsa cat back exhaust, CAI black powder coat cold air, Apex cold air intake scoop and Apex washer tank relocate kit, Dynatech SuperMAXX Ceramic Coated LT Headers, High Flow Cats, JRE470 Rough Idle Cam Package, DSS 1,000 RWHP Axels, Slowhawk Mustang Dyno Tune, QTP QTEC 66 Low Profile Cutouts and iTSX. 453 RWHP 427 RWTQ WEB LINKS BUILD TIMING CHAIN FAILURE TRANSITION FROM STOCK TO CAM VID

07-25-2012, 07:27 AM	#37
dkg11 Drives: 2010 Camaro 2SS Join Date: Apr 2012 Location: Cleveland Ohio Posts: 387 View My Garage	exhaust cut outs= lots of decal pop __________________ 2010 Camaro 2SS/LS3 Magna Flow Street series Exhaust Airaid Intake+throttle body Custom tune by Bob Morreale www.thetuningschool.com QTP Electronic Exhaust cut-outs 12'' Alpine type R with 1500watts double ported box Tinted windows 392RWHP on Mustang Dyno #13933

07-25-2012, 07:16 AM	#35
1954 Belair-man Drives: 2010 Camaro IOM 1SS M6 Join Date: Aug 2010 Location: Michigan Posts: 889	Oh yeah

07-25-2012, 07:37 AM	#41
Cody6.2 Drives: 2012 Camaro 2SS Join Date: Feb 2012 Location: Nebraska Posts: 605	I'm part of the hate DFCO noise crowd. During our last local cruise night I went muffler free and there was plenty of popping to go around. I knew the popping was a bit much when I overheard a crowd of spectators mutter what the f*#@ is wrong with that Camaro.