Comp Cam 1

Have an LS3 in an older car (bone stock motor) with 2.5 exhaust when I let off the gas I hear the pop pop pop sound (around town it gets anoying)? Would a bad tune cause this and a good tune fix it? I also have a crossover pipe (H type) to relieve the back press but still pops? The mufflers are chambered type in the stock location.

Mike@DiabloSport

It can be cleared up in a tune....start by adding timing under decel, that usually does the trick without affecting mileage.

Thanks

zwaldo

would that be true for a car thats supercharged, full exhaust no cats making 615 hp.

I always though that the the less restriction in the exhaust, the more apt it would be to do this.

not being a smart ***, just asking cause mine pops like a racecar all the time now that I have it finished, and the car was tuned. didn't know if i should have my tuner drop some timing on the decel to kinda help that out some.

Mike@DiabloSport

Yes, this would clean it up in most any application.

You can also mess with the DFCO settings, but that will often affect mileage in a negative manner.

Thanks

edcmat-l1

Increasing DFCO spark will clean it up a bunch and not affect mileage. All you're wanting to do is keep it from pulling the timing into the negative when you decel.

Comp Cam 1

Thank you for the response!

Rustysocket

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1MEANGS

I dunno bout yous but i love my "Pop Pop Pop" sounds from my Corvette exhaust lol

black.z51.c6

hahah me too, I found that if i keep in first gear and get it to about 4-5k rpm's and just let offthe gas without putting the clutch in it goes pop popopopopopopopopop

REDC4CORVETTE

Mine does that when I set the NPP to stay open

Speedforhire

Love it on mine also. NPP stays open 9pulled fuse) and it pops like crazy even backing off the gas at 2500rpm's in 2nd or 3rd. No need to hit the rev limiter........LOL!

El Gupton

I have that popping too and don't like it. Very annoying. It started after I installed headers and 3in pipes all the way back.

Dado5

My LG headers with SLP loudmouth pops like a gun. Scare people all the time Love it

meanjoe

I agree. Mine didn't start popping until I installed the Borla Type S.
Needs to stop. makes it sound like an old car.

garye

same here, pop,pop,pop. other than being a bit annoying (depending on preference) does it hurt anything mechanically?