Babbling Exhaust CPU driven??

[dunce]

I have a 2005 vert and I do love the exhaust sound. Have a sort of have a bet with some buddies about the noise.
I noticed that the burrble when you coast only last a certain amount of time, regardless of RPM, roar grade etc.

Do you think this "Letting off the gas burrble" is actually computer generated??? Don't laugh some motorcycle computers DO cycle the idle speeds, cause' as any hot-cammed hot rodder knows....no high powered machine can idle well.

z

 

[Viper Specialty]

that is the Decel Fuel Shutoff timer. It is part of the programming, but not for what you think...

 

[Vic]

I heard the Gen3 exhaust uses active noise cancellation. Could this be related to the effect you are noticing?

Is there any beer in the fridge?

 

[zorroespanol]

that is the Decel Fuel Shutoff timer. It is part of the programming, but not for what you think...

Daniel you don't cease to amaze me with your Viper knowledge



What's that for?

 

[DAMN YANKEE]

Daniel, I would like to know what the Decel Fuel Shutoff timer is all about. what is it for?

 

[Viper Specialty]

From what I can tell, it serves two purposes:

1. It eases shifting because a shift takes place before the timer times out, in effect not "turning off the engine". It helps to keep the RPM's from dropping like a rock inbetween shifts, well below the target rev match.

2. I also suspect it has to do with emissions. By allowing a metered amount of fuel to go through the engine at low load, it would allow the unburnt fuel to collect in the cats, which then followed by fuel shutoff, would increase cat temp drastically, but in a controlled manner.