the JCW MCS manual makes 210 bhp at 6950 rpm, whereas the JCW MCSa supposedly makes 203 bhp at 6450 rpm - I reckon loss of the 7 bhp is due to the fact that the transmission is programmed to shift up at 6450 rpm. someone correct me if I'm wrong, but doesn't the JCW software raise the rev limit for the manual? this probably isn't possible on the MCSa without revised transmission software . . .
it's a total mystery.... i've just about given up all hope here....sadly.
mini has gone silent on the subject. nobody has any info. i've even begun to consider an aftermarket pulley upgrade from randy webb - if it makes any real difference.
i've really enjoyed the jcw exhaust and air box combo - makes the car livlier for sure - but finishing off the kit is the clearly the goal. why mini seems to have completely abandoned us on this i just don't know...
I've finally discovered why the MCSa kit is not available in the States (and in Canada, I'd guess).
It is to do with the kit not meeting emission standards in some of the states. I found this little tidbit in an interview that Motoringfile did with the MINI product manager from MINI USA.
So now comes the next loaded question: how can the regular JCW kit meet emission requirements for all 50 states, but the same JCW kit adapted to the MCSa cannot? I can't see too much difference aside from the ECU remap. This is now the next mystery to uncover....
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