Quote:
Originally Posted by SSDan
I would agree with you if we were all driving old school carbed engines with distributors and used screwdrivers, dwell meters and timing lights to tune them.
With the engines we run with direct injection and ECU engine management - the crackle and pop is there intentionally from the factory in the tune. Its called Decel Fuel Cut Off (DFCO). It can be turned off in the tune and many owners and/or tuner shops turn off DFCO to make the pop stop. I happen to like the sounds so I'm good with it.
To answer the OP's question - in the tune I don't think you can enhance it as DFCO is either on or off in the tune tables I've seen. Maybe some combination of exhaust changes can make you hear it better. I personally won't waste money on exhaust changes - NPP works great. If you go messing with the exhaust to make it louder you risk creating drone at cruising speeds. I hate drone.
Oh - and I too vote no on "Maro".
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You were close you just got it backwards. Disabling DFCO will cause the noise because its not going dead lean on decel, its maintaining lambda and in turn dumping a bunch of un-burnt fuel into the exhaust.
If you leave it on, it will not crackly as much. If anyone has a WB in their car, at least in an M6, the car goes stupid rich for 1-2 seconds on decel and then straight to dead lean (Into decel, Lambda to .83 for 1-2 seconds then straight off the chart 20.0) I think that's how they are getting the "pops and crackles " you are talking about.
Turn off DFCO all together if you want the noise in excess, car wont engine brake worth a shit though. It can also be tuned based off of upper and lower limits. You can have it off below 2500 and on above etc.