Clint, I forgot to tell you the one rep with Wilwood, told me the slotting of the rotors started in Europe. They used Asbestos brake pads which gassed up pretty bad under severe braking, hence the drilled and slotted rotors to help dissipate the gas. Somewhere I remember reading the same in a magazine!
Dan -----Original Message----- From: Clint Hooper [mailto:[EMAIL PROTECTED] Sent: Thursday, October 27, 2005 4:33 PM To: The Chevelle Mailing List Subject: Re: [Chevelle-list] Brakes The larger diameter rotor you have,the more mechanical advantage it has and more heat absorbing/rejection capability,all else being equal. One of the big reasons larger diameter wheels came into being was the ability to utilize larger diameter rotors & bigger calipers. Ever noticed the front brake systems on a new Z06 or Viper? Yep, 14" rotors with six piston calipers. Actually,I think you might have misunderstood what Wilwood said about drilled & slotted rotors. Holes and slots actually reduce the swept braking area of a rotor and drilled holes are prone to cracking under racetrack conditions. Cast-in holes are less prone to do this as Brembo will tell you. However,I've been running drilled rotors on many street vehicles,for many years,without ever having to replace a rotor due to cracks. The key word here is "street",not on a racetrack. The main reason for drilled & slotted rotors is aesthetics. Another advantage of 17" and larger diameter wheels is the ability to run ultra high performance tires. There just isn't anything available in 15's and 16's. Great brakes are worthless without great tires. Since you will need the larger diameter wheels to clear the bigger rotors,buy the larger rolling stock first and install some sticky wider tires.(no 1960's widths here) This addition along with your Hydraboost system will make for pretty decent stoppers. Your 72 can handle some large rolling stock. Clint Hooper H&H Custom,owner 1969 El Camino ProTourer 2001 H-D FLHR custom bagger http://dalesplace.com/misc/friends/clint/clint_hooper.htm ----- Original Message ----- From: "Dan Mascheck" <[EMAIL PROTECTED]> > I'm planning on upgrading my brakes. I have the old single piston front disk > and drums in the back! > I run 15" wheels and know it limits me to 11" rotors. I would have to > upgrade to 17" or better wheels to get the larger 13" rotors. The question > is...how much difference do you gain in stopping power going from 11" to > 13"? I know you can get 6 piston calipers on a 13" and 4 piston ones on an > 11" system. No manufacturer will tell you! > Wilwood also said the drilled and cross slotted rotors were only needed for > racing purposes, but...I see so many buying them. Is this just overkill? > Baer said nothing about the slotted rotors. > I don't want to spend an arm and a leg for something that gives me so little > bang for the buck. If 13" rotors make that much difference, so be it! > I am using the Hydraboost system on my 72 Chevelle! > Dan Mascheck > Wharton, TX
