Originally posted by AirKnight:
Actually, less contact area doesn't equal to less friction. I got into this arguement with my friend, and found that this was wrong. Here's why. When you have less surface area to be acted on, you'll have more force per square inch to be counted for. So, when you have less surface area to act on, there are actually more frictional force on the remaining area which will turns out to have the same net frictional force. The easiest way to visualize it is to wrap a block of wood with sandpaper, then measure the force it takes to push it laying flat on the ground; then measure the force it takes to push it laying sideway on the ground.
But, because of the added stress, the cross drilled rotors will probably not last as long.
Originally posted by DemonSVT:
[b]Less surface contact area = less friction = less stopping power. (simple physics)
It also equals significantly lower rotor life due to cracking from the heat cycles.
Airknight,
we've had this argument before. What you're saying is true, but I don't think it applies to rotors.
We've had this discussion before using the width of a tire. Why aren't we all running on 155mm tires? Using your logic, a 155mm wide tire will have as much grip as a 255mm wide tire. Absolutley false.
Why wouldn't we have a tiny ass caliper (using the same amount of pressure as what we have now) with a 1" x 1" brake pad? Theoretically, using your logic, it would brake the same... Absolutely false...
John
