> I've been researching that subject for quiet
> some time now and the best money/performance
> combination IMHO is: toyota calipers,
> semimetallic pads and 84-89 300zx front
> rotors they are vented and only need minor
> mods to fit( using stock hub). you can
> always cross drill them.
Travis,
Assuming you have to identical rotors, but one is cross drilled, here is what you will notice. One, the cross drilled breaks will seem to grab more, for the holes tend to keep the pads from glazing, so they bite harder. They may even brake better a few times. But as you repeatedly stop, and really heat up the rotors, the non-cross drilled rotors, with their more mass, will do a better job of rejecting the heat that your are dumping in copious amounts into them. The cross drilled will fail first, usually cracking around the holes, and over heating your breaks, causing either pad fade, or fluid boil.
But that is an absolute worst case scenario. You need to look at how your 240's brakes are doing now. Are they fading after a few spirited runs around the block? And what kind of fade is it? Is the pedal going to the floor,(brake fluid boiling, requires upgrading and flushing the fuild), or is the pedal hard, but just not doing anything,(pad fade, over-temp the pads, rendering them useless). Or do you just want the cool factor, ie hey man cool brakes!.
With that in mind, it will help you know what to do. As Stan put, my webpage has the vented rotor conversion that was posted by Stephan Moffet. He loves it, but remember, that adds unsprung weight, which is somewhat detrimental to handling. Obviously for the ultimate setup, go with the Willwoods, but thet is an $$$ option. Optimize your stock setup, then go from there.
-Bob Hanvey