Quote:
Originally Posted by wwanthony
Well....
I have had a RaceChip (set on C) for about 7 months of the first year with my 2015 X5 x35i xLine. I have enjoyed it. I had the MPPK installed the other day and wow what a great upgrade to the car. I drove it for a couple of days without the RC. Yesterday I stacked the RC on top of the MPPK and all I can say is do it. Each and every one of you......
Just do it.
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The technical side of me is kicking in about double stacking...
The aftermarket tunes (Jb4 or Racechip) increase the boost levels (among other changes) to a predetermined PSI. correct ?
Lets say JB4 map2 and racechip set on C raises the PSI to 15 or 16 .
With that in mind...Lets say the stock PSI of the turbos is 12.
When adding the MPPK, it is safe to assume the turbo PSI it's increased (in order to produce more power). Lets say 15-16 PSI.
So what I dont understand is how the stacking the after marketune to a MPPK car will provide any additional performance ?
Perhaps a dyno or race slips can prove this doublestacking theory provides any performance gains
anyone ?