Will Answer your PM now, sorry for delay i have been flat out sorting stuff at a big show we have in the UK at Present.Question... big thing that people have been trying to do is get the gtr faster than 217mph
there now is a
ALBINS 230 MPH FRONT & REAR PINION
To allow for those, but no one knows what this will do to the electronics of the gtr. iirc its 2.7:1 front, 3.4:1 Rear Ratio. Do you think with the syvecs that this would be less of a problem if all the aero was sorted out?
With regards the Final drive changes i can imagine the stock traction control and probably the 4WD unit will not be happy with the differences in speeds but the only issue we would have would be with the 4wd unit. Dont forget though we could just add corrections on the Can Bus for the parameters which will need to be modifed to keep the 4WD unit happy like Wheel speeds, Output and input shaft speeds etc
Another big benefit we have found is that the stock ECM has a maximum torque reduction amount on gear changes which for big power car might cause fairly harse changes on at WOT. We are currently making the Torque reduction fully mappable for Ramp out, and Ramp in to ensure a smooth but correct amount of torque to be pulled to keep the box in one piece for longer.