Turtle n Peeps wrote:
For those of you that think drilled and or slotted rotors are the way to go on a tow rig you would be mistaken. You are taking away from your braking force and not doing a thing for cooling.
Here is an article that explains it very well.
Here is another really good read on the subject.
There's a lot of misconceptions about drilled vs non-drilled rotors and what the drill holes do for cooling. GM did a study back in 2006 on just this very topic. http://papers.sae.org/2006-01-0691/
I downloaded the paper...
"Testing on brake system 1 confirmed that the 90-hole
crossdrill pattern on the front brake improved heat
rejection capability of the rotor between 8.8% and 20.1%
depending on the vehicle speed."