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Exhaust Popping/Crackling!

yZoH

//There Ain't No Rest For The Wicked...
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Hey all, SHoved one of my old tunes by greenfoam in my car.... My injectors have gone from 17lb injectors to 22lb...


Exhaust popping/crackling eg: v8 supercar style = Running RICH?!?!?!

In first gear at about 3000-5500rpm when i ease off the accelerator...

Sounds ok.... LoL but should I be worried.

Laggy down low(can't spin off the line).....

Crazy mid-top end(drop it from 2nd to 1st at 4 and punch it with wheelspin)....

Cheers
MaT
 

VN-SV-89-LE

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mine pops and shoots flames out the back when i put the 2 1/2 inch system on it and thats all, its the same sounds like a supercar, sounds tuff but i think its just unburnt fule for me when it shoots the flame out the ass :yeah:
 

JD

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yeah the popping is normal my vp did it and my vn does it.
 

fabz

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yay my VT does it, i got a 2 1/4 cat back with a 3" high flow muffler. When i back off the gas at about 2500rpm - 3000rpm it pops like a turbo. I like it coz when you plant it, it sounds like a v8 turbo ha ha!!
 

greenfoam

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A popping exhaust is running lean on decceleration, there's not enough fuel to explode in the chambers so small amounts escape unburnt into the exhaust then once in a while they catch on fire and pop. It's just because that tune was one of the old ones when I ran my car in open loop and the fuel map is setup like that, but even a stock chip will do it. Ps I wana see how fast or slow your car runs on a gtech :) do it!
 

fitzy2005

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VN-SV-89-LE said:
mine pops and shoots flames out the back when i put the 2 1/2 inch system on it and thats all, its the same sounds like a supercar, sounds tuff but i think its just unburnt fule for me when it shoots the flame out the ass :yeah:
hmm can no be good for the cat
 

pandaman

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Mack said:
Yeh, it may sound kool, but it woudn't be doing any good for your cat/zorst?
Hozy was saying in another thread that his cat was already stuffed, I guess now we know why. :D I get the occasional crackle out of my VN 5l if I back off suddenly from hard acceleration, but I generally don't drive it hard enough to do it. (lack of points ya see)
 
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