andyhorror Posted November 11, 2014 Share Posted November 11, 2014 Was helping a buddy at the shop with the brakes on his lsx rx7, when i picked up one of the calipers. WOW are they light. all aluminum four piston fixed caliper and they're cheap at 35 a piece. so i was wondering if this would be another budget upgrade option. after some looking seems to be a fairly popular upgrade for the ae86 guys. im a long ways off from brakes but i wanted to put this up to see if anyone had opinions. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted November 11, 2014 Share Posted November 11, 2014 Sounds good, I sense an opportunity for you. Quote Link to comment Share on other sites More sharing options...
andyhorror Posted November 11, 2014 Author Share Posted November 11, 2014 my 240 just got pulled out of the barn after a 25yr nap. still putting together pieces for the engine/trans swap at the moment. once ive worked my way out to the wheels i may try the ae86 swap. Quote Link to comment Share on other sites More sharing options...
Pac_Man Posted November 11, 2014 Share Posted November 11, 2014 Sounds like a good plan. I'm sure you'd need some kind of adapter bracket but it shouldn't be too difficult to make it work. Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted November 11, 2014 Share Posted November 11, 2014 I have a video on youtube of these brakes on my car. I had a temporary bracket made for fitment purposes and never got around to making a permanent bracket. It uses the 4 lug z31 rotors. Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted November 11, 2014 Share Posted November 11, 2014 http://m.youtube.com/?#/watch?v=Jn1GclpDZa0 Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted November 11, 2014 Share Posted November 11, 2014 I also have a blueprint for the bracket if you want it. Quote Link to comment Share on other sites More sharing options...
thezguy Posted November 11, 2014 Share Posted November 11, 2014 I also have a blueprint for the bracket if you want it. Can you send it to sbsmichael@yahoo.com Quote Link to comment Share on other sites More sharing options...
socorob Posted November 11, 2014 Share Posted November 11, 2014 I had these on an old british car with no power assist. Aren't the pistons small on these? Quote Link to comment Share on other sites More sharing options...
_Donovan_ Posted November 11, 2014 Share Posted November 11, 2014 I have been looking at a lot of different options but I found it just easier to go with the arizonazcar options. Quote Link to comment Share on other sites More sharing options...
andyhorror Posted November 12, 2014 Author Share Posted November 12, 2014 hybridz is the best forum whoops is that and exception to no best. awesome skirkland could you send me the blue prints? wont be able to do anything with em for a while but when im ready, i work for a metal distributor so id only have to pay for machine work. Quote Link to comment Share on other sites More sharing options...
andyhorror Posted November 12, 2014 Author Share Posted November 12, 2014 yes socorob they are smaller but four equal out to more surface area than 1 big piston. just like 4 valves be betta than two Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted November 12, 2014 Share Posted November 12, 2014 Here is a diagram of the hole locations. Use 1/2" steel plate. The outter holes will need to be tapped. You will need to grind the calipers a bit on the sides of the mounting pads. Also need to shim the hub on the spindle about 0.080". Use 4 lug Z31 rotors. Will also need some wheel spacers. Aftermarket wheels will work better. Quote Link to comment Share on other sites More sharing options...
helghast7 Posted November 12, 2014 Share Posted November 12, 2014 (edited) Always interesting to see people here have use for Rx-7 parts. Little info on these calipers for those that want to try this out. Both FC (87-91) turbo and FD(93-95) came with the 4 piston fixed front calipers which are completely interchangeable. The ONLY difference between the 2 models is the older FC calipers had cooling fins on them. However after much discussion and testing on Rx7club they found minimal gains at best for the older cooling fin type, so really any ones you get will be fine. Just have to grind off the mazda emblems on them lol. Oh I almost forgot, just as people say here that our stock brakes are good for decent power, for the FD they tell you on rx7club that the factory brakes with good pads and rotors are good for up to but not maxed out at 500whp before any real brake fade would be noticed and thats coming from a car that weighs roughly 2800 lbs wet factory. Edited November 12, 2014 by helghast7 Quote Link to comment Share on other sites More sharing options...
andyhorror Posted November 12, 2014 Author Share Posted November 12, 2014 I'd like to try to figure out a way to keep the rotors in the same location. I don't know much about the stock z brake setup yet just what ive seen looking at em and in photos. maybe the vented rotors from the toyota setup to keep the weight closer to the center of the car. z31 rotors and your bracket would be a good start. my wheels should provide plenty of clearance at 9in wide 0 offset. Quote Link to comment Share on other sites More sharing options...
johnc Posted November 12, 2014 Share Posted November 12, 2014 Focus on brake balance, not piston quantity or size. Good brake balance is the most important aspect of a brake setup. Quote Link to comment Share on other sites More sharing options...
andyhorror Posted November 12, 2014 Author Share Posted November 12, 2014 Here is a diagram of the hole locations. Use 1/2" steel plate. The outter holes will need to be tapped. You will need to grind the calipers a bit on the sides of the mounting pads. Also need to shim the hub on the spindle about 0.080". Use 4 lug Z31 rotors. Will also need some wheel spacers. Aftermarket wheels will work better. can you explain the shimming of the hub on the spindle for me? is it to bring the rotor into correct alignment with the caliper? if so could i shim the bracket from the knuckle or the caliper from the bracket? 1 Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted November 12, 2014 Share Posted November 12, 2014 Yes it is shimmed to get the rotor centered in the caliper. If you shim the bracket it will move the caliper in the wrong direction. Quote Link to comment Share on other sites More sharing options...
NewZed Posted November 12, 2014 Share Posted November 12, 2014 brakes are good for up to but not maxed out at 500whp before any real brake fade would be noticed Horsepower is for accelerating, brakes are for decelerating. There is no horsepower rating for a brake system, it makes no sense. Quote Link to comment Share on other sites More sharing options...
andyhorror Posted November 12, 2014 Author Share Posted November 12, 2014 i could have .08 machined from the bracket to avoid hub shimming correct? does the caliper sit on the backside or front of the bracket? sorry for all the questions just trying to get the overall picture, the video didnt work. new zed thats what i was thinking but didnt want to be that new guy lol. Quote Link to comment Share on other sites More sharing options...
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