As for my ABS, a change is needed if you are running slicks
.. I just pulled the trigger on the Bosch Motorsport ABS and what an improvement.
Jack , could you expand a little on what the Bosch Motorsport ABS brakes are like compered to OEM ...
What have you found to be the biggest difference ?
Lap times any better ?
Barry, day and night difference. The stock Bosch ABS was designed to work well with R-compound tires of the same OD as is fitted standard. In fact, ironically, this newer Bosch ABS system as compared to the older Kelsey-Hayes system on our 2-11 is far worse once you go to slicks, in part because of it's greater degree of sophistication and resultant programming.
Running the Yoko slicks (more grip and different overall diameters), the stock ABS system is overly intrusive and in a bad way. If you try to threshold brake, the ABS intervenes, your braking power disappears completely and the only way to get the brakes back is to release the brake pedal and re-apply. The ABS system just thinks you are out of control.
That can be very challenging and dangerous when you are traveling at 130+ mph and are trying to brake late and hard.
As a result, you need to adapt/change your braking technique to that which is opposite of what is proper for a track driving/racing
. easy on the brakes at first, gradually increasing brake pressure thereafter. This prevents you from getting the benefit of aero upon initial braking, getting proper weight transfer, trailing off the brakes to aide in turn-in and overall faster cornering speeds.
The Motorsport ABS has 9 settings which you can dial-in for differing track conditions. You set up the system by inputing data about your car, like tire diameter, corner weights, etc. (There is also a switch to turn off ABS completely if you so desire.) You can now threshold brake relying on the ABS to prevent lock-up and when the ABS activates, the brakes still work -- no drama -- you feel the ABS, but the reduction in brake pressure is just enough to prevent lock-up. In fact, I've been told that if I'm not getting into ABS with this Motorsport system, I am not getting its full benefit and more braking potential exists. I can see why the Motorsport ABS was banned in certain racing series in the past --- it's like cheating.
Yes, it does contribute to better lap times once you "unlearn" the bad habits you needed to use to make the stock system work.
Hope this made sense.
Photo below of the magic "knob"