Quote:
Originally Posted by pokeybritches
I've read somewhere that there is no 91 octane map on the stock ECU, only 89 and 93. I have no idea why BMW would do this when half of North America uses 91 octane. Regardless, some of the gains might be because the car was taken from an 89 octane BMW map to a 91 octane aftermarket map.
|
which is still worth the upgrade alone...I want to see a dyno with less variables, but then again I don't doubt AA's work