sweet

 

So what is the advantage of switching to 15s?

 

Massive selection of tires, more sidewall, looks badass too if that's your style. I'm either going to run the MT 315/60/15 drag radial or the 29.5" MT stiffwall slick. Track only tire.

 

Yea tire selection and best traction with the 15's is why I want them. A 30" tire is what I want to run at the track and you can't find one in a 17" wheel. They only make a 28" tire for 16" and up wheels.

So I told GMCtrk that I will try and have the backing plates made. I'll have to draw them up in Solidworks or Inventor and send the drawings to one of my machinist buddies. In fact I just got off the phone with one of them and he as a CNC mill in his garage. So I'll do some research and find the radius from the center of the axle tube to the caliper bolt holes. Should be a very simple drawing and easy to make.

 

What do you guys think about the 1" vs the 1.28" thick rotors? I can only find the thicker rotor. Any reason why we would want the 1" rotor?

 

The spacing on the thicker rotor and caliper with respect to the backing plate may not work. Notice that with the 1" thick rotor the backing plate is a flat piece of steel. If you use the thicker rotor it may need to be offset.

 

Whats wrong with what you have listed below??? Seems cheaper than making a bunch of stuff?

 

It's not "a bunch of stuff." It's just a simple metal bracket. Total cost should be well under the drum brake swap. The rest of the parts can be had at any parts store. You also maintain disk brakes instead of drums and it's essentially bolt on. Drum install requires pulling the axles out.

 

I would rather have disc brakes all the way around then drums. Seems like I would be able to hold a lot more boost on the line with discs in the rear. And making the mounting plates shouldn't be expensive by any means.

 

Michael, did the guy in the pics use a 1" thick rotor because of how his caliper brackets were made?