agh1889

iTrader: (1)

I heard from someone that evo 8/9 brakes will mount perfectly on an fc. If any has heard or done this let me know cus i dont wanna spend the money if there not gonna fit.

need RX7

iTrader: (4)

It's not a bolt-on swap, but it has been done.
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/my-evo-ix-brembo-calipers-fc3s-upgrade-719280/
http://www.spooledupracing.com/viewtopic.php?f=65&t=311

frijolee

iTrader: (1)

It works (kinda) but the piston bores are all wrong so expect to spend a bunch of time screwing with master cylinder sizes and playing with brake bias. The best install I've seen used a Tilton triple master setup, but that's tough for a street car.

clokker

iTrader: (2)

I wouldn't say "a bunch of time"...find out what size MC the Evo has and start with that...

frijolee

iTrader: (1)

Hey Clokker I was just reading some of your research on 929 boosters. Good stuff there fella.

FYI Evo = 1 1/8" MC... Piston bores are 40 and 44 mm staggered. That's a big enough difference that I'm not sure your average adjustable prop valve can compesate for the remaining stock rears (and curves of the knee point are so damn hard to come by). Then you need to flip the caliper spanning line to get the bore stagger oriented correctly and you still have to machine the OD of the rotor. This is not to mention that many wheels won't have the spoke clearance to fit without spacers. Yes, the EVO caliper "bolts on", but you're not remotely done yet if you want brakes that work in addition to looking good.

The reality is that it looked like the OP was looking for a silver bullet and I'm not convinced the EVO is it. I looked at EVO brakes in depth before pulling the trigger designing my DIY mandeville setup. All I'm saying is that the person doing the mods better be quite confident in their knowledge and abilities before jumping in otherwise they're in for some disappointments.

clokker

iTrader: (2)

Hi, I've quite a bit of your stuff on the V-8 forum.

I think it's the front/rear bias that's going to be the killer issue here.
Machining the rotor OD is a one-time, not terribly difficult, procedure.
Swapping the transfer tube/bleeder screw is about a ten minute job.

Even including the spindle machining (to center the caliper), the EVO swap is about as close to a "golden", true bolt-on conversion as you're ever going to find...so I can really see why the attraction is so compelling.
The temptation to believe that something so close must be right is very powerful.

I'm fascinated by the swap but haven't figured out what to do about the rear axle.
Options include just leaving as is and see what happens, somehow fit the Evo rear caliper and use the Evo prop valve (has the disadvantage of losing the ebrake function) or fitting a larger rear rotor and spacing the stock caliper to fit.

Just mentally toying with it since the Evo calipers don't exactly grow on trees and I'd need a screamin deal to make me pull the trigger.

Black91n/a

You'll need bigger rears to even get remotely close to proper bias without a dual master cylinder setup. Corksport has an appropriate kit. Even then you'll basically need to run without a bias valve to get enough rear braking to balance it out.

agh1889

iTrader: (1)

Thanks for the input guys...guess they do just bolt on but with alot work after...looks like I'm just gonna do a big brake kit and swap everything out...I was only gonna do the evo brakes cus I thought it was a easy way out.

frijolee

iTrader: (1)

What's your reasons for doing big brakes? Unless you can find some hydraulic specs on what you're installing you may still have some of the same bias issues as the designs practices of even some well known firms (IE brembo) are pretty bad when it comes to the aftermarket. You'd be shocked how many of their kits use the exact same calipers regardless of vehicle mass, weight distribution, planned tires etc.