[Chris1529]

I think that reaction time has a lot more to do with your converter specs and where your front tires are with respect to the light beams than it does with brake pressure.

Front and rear tire pressure affect it too.

If you try to crowd the converter too much, your reaction times will probably slow down as the converter "gets tighter" and looses some of its ability to flash.

You may find your car launches well at 1800 rpm, but it may react quicker at 1700 rpm or it may react much slower if you try to launch at say 2300 rpm.

brake pressure is one component that affects whether you can hold the car to the point your converter will stahl, but I don't think it has that much to do with reaction time.