Quote:
Originally Posted by deesea
jimmie004 now that sounds really really interesting. I'm already using a MHD tune. Held off on the stage 2 tune because I don't need the extra power...Are you a beta tester or something for this new tune?
Wonder if it will make the same noises without E85.
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I wouldn't label myself as a beta tester, just happen to be local to another guy who does a LOT of testing and designing. He had it on his car but needed another n54 with a louder exhaust to demonstrate the sound better.
The mastermind behind it all is jyamona with 3000GT MR being another guy helping him test things out.
The type of fuel will have little effect on the sound..it has everything to do with your exhaust setup. You'll hear it regardless, it just might be quieter or louder depending on your exhaust.
If you're running any kind of aftermarket exhaust, you likely already hear some pops/gurgles when you feather the throttle on decel. To the best of my understanding (so don't quote me on this)..What you're doing is essentially resetting the timer in the dme to inject fuel after throttle closure. The factory time is extremely short on the n54 which is why you only hear a few gurgles, if any. There are other ways to make the sound (one of which is to adjust your wastegate) but those are just hacks. This is actually programming the dme ppk tables to be identical to the n55 (or more/less depending on your liking). So it is true coding as though bmw did it from the factory. Basically what is happening with this option enabled is the timer to inject fuel after throttle closure in increased. There is a lot more that goes in to it, but I'm not the one to explain it with any shred of honest first hand knowledge.
Couple notes in response to some other posts..
Yes this can be really loud, but if you ease off on the throttle and drive neighborly, you won't piss off your neighbors..in fact, they probably won't notice a difference. But, if you drive like a douche in your neighborhood, then this will point it out and every will hate you for it if they don't already.