Exhaust popping sound is it normal?

[IEATVETS]

Had Harland Sharp rockers installed along with new springs, pushrods and a valve spring upgrade kit in my 94 RT. My car has always made a little bit of a popping sound but now it has really intensified! I will be driving at 40mph in 2nd gear and the popping sound from the exhaust is intense. I like it, it sounds really mean, but why did it get so much louder after I had this done? Is it hurting anything? Any input would be appreciated.

 

[Dimitrios]

my pop sounds are getting louder as well. think the cooler air might have something to do with it?

 

[JWVIPER]

my pop sounds are getting louder as well. think the cooler air might have something to do with it?

D, you still have that Jiffy Pop Machine running on the Viper ,


couldn't resist, love your pops man !!!

 

[Dimitrios]

i'll give you a POP alright!

 

[Kiaser]

like a backfire pop or the rumble popping?

 

[V 10 MAFIA]

Aye Poppy! Poppies are good as long as they happen off the gas instead of on the gas.

 

[IEATVETS]

Slighty into the gas is when it happens most. Also pops when downshifting but really picked up when just cruising at a steady speed.

 

[Dimitrios]

i got mine when i let off the gas at around 4-5krpms

 

[SNKEBIT]

do ya have lack of power???? should only do it on decel. any throttle at all and I would think a valve isn't closing....

 

[Qualitywires.com]

it's just unburnt fuel that is doing that. The Vipers run rich on deceleration. It's normal. It's not hurting nothing

 

[rgavitt2002]

On a serious note, my 02 does the same thing, in fact intensified after adding roller rockers. Took my tech for a ride, says normal. Put on Belanger headers and randon tech ctas and borla cat back. Only happens after heavy acceleration and letting the engine wind down on its own.
I wouldn't worry unless it backfires.

 

[IEATVETS]

Alrighty then! No worries here, does sound kinda cool though.

 

[Steve 00RT/10]

Alrighty then! No worries here, does sound kinda cool though.

It does sound cool, but I think unburnt fuel out the back may be horsepower lost. My car did that too before adding the VEC1. I had also run a Mopar race computer on my car for a while(big popping/gurgling on deceleration--sounded great!). However, dyno runs proved significant HP loss with the race computer. With the stock PCM, HP&torque were still 14&20 less respectively than with the VEC1. I now get no exhaust popping under high RPM deceleration. I get just a little from 15MPH to idle. It might sound nice, but it's lost power.

Steve