Yep i did one track day with the new power at philip island on street tyres, brakes didn't give me any hint of issue, traction did tho
On street tyres, the brakes lock up easier, so i guess theres less friction there before lock up on streets, compared to semis, there would be more friction which could be part of what causes it... Went to winton with RB74's thats where i killed my discs/pads on semis.. then went to PI with DS3000 and new fluid, and had soft pedal pretty much straight away... very annoying.... which just means heat is being put into the lines/fluid i guess, so hoping getting rid of the heat before it gets that far will work. Ie DBA5000 + get rid of stone guards, plus look at ducting.... Works for chris, gotta work for me right?
Also ben says semis make brakes work way harder, and we all know he's never wrong
Besides that you can jsut feel semis putting more strain on the whole car, suspension, brakes etc....