As for the different distances on the same tires, there's more at play there, there's weight, tire size, cg, etc, etc. They'll all affect the outcome.

There's a limit to how much pressure one can apply to the pedal, and that'll limit the amount of pressure on the pad. With a different MC, caliper, booster or pedal one could apply more pressure to the pads. Presuming this limit has been reached, a more aggressive pad or larger rotors will be the only way to get more torque from the brakes.

A hole is a hole is a hole. It doesn't matter if it's an eBay hole or a Brembo hole, it's still a stress riser and will decrease the lifespan of the rotors before cracking occurs.

I've read that the Mazdatrix lines were coated, apparently not. The Corksport ones definetely are (I've got them), as were the Goodrige lines my dad got for his Miata.

The stock brakes are more than enough for most scenarios, even hardcore racing. The feel and pedal stiffness you can get from them is quite good. They're some of the best stock brakes out there.

 

Im not going to touch circuit racing since I dont have experience racing around and hitting the brakes at high speed.

I am mainly talking about daily driven street driven rx7s. Glad we agree on something

 

Yes an no. I Should say this is a very debatable area since it depends on a lot of factors. It is a stress point but also highly depends on the meterial used in the casting ,design and treating process(if any) of the rotor.

I will let everyone know when mine give out. Wont be any time soon though.

I had a rotor that was chewed down to half its size because of my rear caliper locked up and the pad wore down to the metal backing. Lets say in a very hard point in my life I had to ride around for about a month like that. I could not believe the rotor didn't crack or give way after reaching the thickness it did. So far that and driving with the front calipers locked up for 3 miles making them red hot, and them being alright after without warping or cracking. I would say it all depends on the meterials used.

 

Listen to him.

 

I think Mazdatrix sells two different sets. Thier D.O.T. approved lines are coated or have the rubber sleave. The race only lines do not.

 

If rotor diamiter has nothing to do with stopping power, then why do the new semis that use disk brakes have 17" rotors. But on a serious note the best upgrade on my brakes were better tires on lighter wheels, Hawk pads, and the whole brake system rebuilt. Thats when you can accually compare things. These cars are old and most parts on the braking system are work out badly, and need replacing anyways.

 

Semi's need the massive rotors (I'm actually suprised they are only 17") because they are fircking heavy and need all of the stopping power and fade resistance they can get.
As for the hole is a hole argument, the quality of the materiels goes a great deal to reducing stress fracturing in the brake rotors. This is why people experience cracking on ebay drilled rotors just from street use, while it takes serious track abuse to do it on Brembos.
On a side note, I have noticed that Ferrari is starting to offer Carbon-Ceramic brakes as an option on its more performance oriented models, while they still have the standard drilled cast iron rotors as standard on most of their lineup.

 

I have the DOT approved brake lines and I don't see or feel any coating on them.

 

Maybe they used to and they changed them. It may have been Rotary Performance's lines that had the coating and not Mazdatrix's at all.

 

Well I Emailed Mazdatrix about thier brake lines and YES you are and others are correct about some of the brake lines being coated but this is only in certain batches they get. Here are the emails.