I thought that Precision used an "off the shelf" rotor for easy replacement, no?

 

The Precision hats are 8 bolts x 7" bolt circle, a common size. The RZ/RS rotors, however, are an 'off' size - the diameter is slightly larger then the closest standard replacement rotor.

The closest 'standard' is approximately 2.5mm smaller in radius, which you should still be able to use. It may or may not require slight trimming of the pad. Since I have not mounted mine, I can't say if the slightly smaller 'standard' rotors would cause the brake pad to overhang slightly in this scenario. damian, can you tell us how the pad/rotor sits?

If this is the case, you'll have to ask crispyrx7 about his old Mandeville setup - which 'over-hangs' - as to if he needed to do anything special.

AP Racing makes a near identical replacement for the front, (off by 1mm diameter), but AP rotors are typically pricey and may not be worth it if your car isn't a dedicated track car.

Precision has the specs, so it's just a matter of them making a replacement, if they happen to be out of stock. In either case, any brake specialist can make exact replacements as long as they have the specs, and is a common job. Here is an example of a Coleman custom rotor:

http://www.colemanracing.com/section/index.htp?id=384

 

Looks Sweet!!

 

I had no issues with the mm or so of pad overhang on my old Mandeville setup.
Crispy

 

For those of you wanting to install the dust shields. The fronts are super easy. Just remove the hub:
*see damian's link
https://www.rx7club.com/forum/showth...+wheel+bearing

there are three 10 mm bolts to remove and the front dust shields come off super easy. I would only note to soak the bolts with pb blaster. I was able to remove two easily but one bolt broke. Seems the heat and brake dust made them super tight!

The rears however are a PITA. You need new bearings to install the rears:

See DamonB's thread here:
https://www.rx7club.com/forum/showth...5&page=1&pp=15

 

looks great 7racer :-)

 

Guys,
I have been approved to start another GB for the precision 99 spec rotors. I have quantity pricing on front and rears from Precision Brake CO. Took me abou 3 months to put this together. Posting today in the GB Forum!

Have a look.
Thanks
Ron

 

If the rear dust sheilds are that much of a hassle, is it worth it?

 

HEY CHRIS!

nope! I bought them off of the original group buy thinking they would be easy to fit. Since I learned it was such a PITA to install, I kept them around in case the rear hubs ever need to come off to change them in at that time.....

However, I ended up getting to **** about it, and with Damon's help changed them both in an afternoon. I wouldn't worry about them honestly. The fronts however are super easy and I would recommend swapping those in a heart beat.

The one benefit was that after getting my rear hubs off, Damon noticed that one of my bearings was bad!!! I kinda suspected something and thought I heard some noise but never thought much of it.

So, I would double check your rear bearings...see if there is play or grinding noise...that would be a great reason to change them all at the same time.

Bob

 

nice, they look great!!!

 

By the way... the RZ rear brakes will fit under the stock 16" wheels if you take a couple mm off the caliper knuckes with a file. I run the RZ rears and M2/ Wilwood front under my 16" rims.

 

cool, thanks for the info