But you didn't answer my question about the tires.

 

[QUOTE=mxt_77,May 25 2009, 06:08 AM] Do you use different wheels/tires on the street vs. track?

 

hi dude...i'm using 225/45/17 and 245/40/17 federal 595ss on modulo sports rims. was previously on the same tyres but 255/40/17 on rears. never had an abs issue with the upsize though...

probably sounds like the sensor fault/damage might be wat i need to fix.

 

Understood... I was just trying to think of something that would cause this issue to be seen on the track, but not on the street.

 

Yeah, that is kind of weird. I wonder if the "brake ducting" damaged or affected the front ABS sensors in any way. And I still don't know why it would only happen on track days. Maybe if the signal from a dirty / damaged ABS sensor is weak and then the geometry change from static high cornering loads moves one of the rear ABS sensors a little farther away from the reluctor ring?

 

What year? We had ours in the 2006 fail a year or so ago. Turned out to be the control unit. Now it activates to easily.

 

That was my assumption. Either that or else a connector is loose. Either way it's probably the higher cornering loads that cause the issue.

 

I have the same problem with the fronts. Way oversensitive with a split mu.

 

FWIW, my car behaves fine under braking with no ABS
If you don't mind having to modulate manually to prevent lockup...

 

thank you....i have continued tracking without ABS. Still managed to clock a decent time without it hehe...