i guess i brake hard, burned piston outer seal...
 

here is a pic of the brake piston rubber outer seal that seema to have been disintegrated, only the bottom pistoin on the outside, but the same one on both calipers on the front...

http://www.myrx7.com/images/burtgrommet1.jpg

Looks like you need upgraded calipers to go with those new rotors ;)

heheh, yeah, i have that planned for winter... thinking of upgrading to the RS/RZ system

where are you buying this RZ system?

its the larger system that is on the j-spec rz/rs models, i would buy mine from mazda competition.

Check the group buy "in progress" in the suspension/wheel forum...

A GB on RS/RZ front and rear calipers and custom 2-piece rotors is in the works.
https://www.rx7club.com/forum/showth...hreadid=132320

thanks jim, ill check it out, wonder if they can get it cheaper than i can through mazda comp

In the mean time, you can get a caliper rebuild kit from Mazdaspeed for $30-ish.

-Max

thanks max, do you think it will be ok like this for a few events before i rebuild it?

NO _ don't run it w/o the boots as water will get into the piston bores and destroy your pistons (they are chromed cast iron) by pitting the chrome.
The calipers are easily rebuilt using the MAZDA seal kit (I have done 2 sets) The on big hint I will give you is be sure to blow all the fluid out of the calipers before removing them or else it gets all over the place, remove the FLEX pipe, Open the BLEEDER screw and blow all the fluid out w/ compressed air, (or suck it out w/ a Mity Vac hand vacuum pump) put a hose on the bleeder so you can direct the old fluid into a suitable container. After the caliper is removed blow the pistons out one at a time w/ compresed air and replace the rubber seal in the piston bore, use clean brake fluid to lube everything while reassembling. Then replace the outer seal and retainer. I use a small block of wood and an old worn out brake pad (basically just the backing plate:D) to hold the other 3 pistons in place while removing the one I am working on. :cool:

but will they last till the end of this season, i will be upgrading the brakes in the winter so will they last a few months like this is what i ment...