any one done this if possible?

its the calipers that do it bud;)

Hmmm, i think i'm not following you here. When you say the calipers do it, what do you mean? My knowledge of brake is that the calipers are the things that grip the brake disc. How would changing calipers affect any of the sensors or electronics of the ABS system?

 

Dave

larger the caliper, the greater the force created, which in turn throws all the sensors out as they are working to perametres that are now no longer relative to the braking force applyed. i suppose you could re program the ABS ECU (if possible) but i like to know the limits of my traction without some computer cocking it up for me

All this is true, but all the sensors are doing is checking if the wheel is rotating or not. If the wheel is not rotating and the others are or the ABS unit is still getting a signal from the speed sensor then it knows the wheel is locked so it releases the brake then applies it again. The ABS unit generates hydraulic pressure in accumulator units using electric motors so there is always pressure available to re-apply the brakes after it's been released due to a locked wheel.

 

As you said you'll need greater hydraulic pressure to generate the same force with bigger calipers so it seems to me if you could raise the default static pressure that's stored in the accumulators then the ABS unit would work fine with bigger brakes. All you'd need to do is scale the pressure up to correspond with the increased surface area of the new pads.

 

Dave