Quote:
Originally Posted by MissionPerformance
Right now we are in a middle of B58 group buy event but we will have dynographs posted for M550i very soon.
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I actually have 2 question about your tune:
- Why your low RPM torque is so low, it's even lower than stock?
- Can you flash with tune from MPPSK?
First question is very important, it is very strange situation, IMHO something is fighting with your tune. I mean it looks like something like ignition angle retraction and/or extremely lean condition. Do you actually increasing fuel table? I had number of tunes in past from diff companies and this is first time when I see torque decrease in low RPM range compare to stock. Something is definitely wrong with your tune in my opinion if that is not done deliberately(if it is than why). I personally looking(next year, not right now) for increase in power/torque in low RPM side to 3-4k...
About tune from MPPSK my 540xi should handle this just fine without exhaust upgrade, because mid pipe on 540 is much bigger than 140 and 340 and rear muffler bigger as well. There should be not too much resistance at 540, MPPSK not changing mid pipe, only muffler to create this sound(which I don't like and this mostly why I didn't ordered it along with car)...