I'm just waiting on the wheel spacers I needed to be delivered, then I should be able to test drive the new setup. I will be sure to post all my findings.

As it stands right now, the brake pedal is pretty firm.

 

the 929 brake conversion doesn't appear to be too difficult to do

if you have the right set of brake tools (flare die, flare punch, tube cutter, tube bender, steel brake tubing, and 1/8" NPT fittings) you should be fine with the work required to pull this off. you'll definitely need this collection of tools to put on the in-cabin rear BPV. summit racing has a $45 kit for this without the tubing / fittings. seems like a great deal.

in researching the 929 fitment problem, the results i found are fairly simple.
A) the rear brake line bolts directly on. you said you wanted to add the BPV underhood, as per your previous post, so you might have to do a bit more work, but no more than you'd have to do for your current MC anyways.
B) the front brake lines will require some replumbing. the stock rx7 has two front channels on the MC. the 929 has one stock channel. therefore some type of custom piping or splitter needs to be integrated to handle this. the FD3S had this splitter, so i'm going to research that angle of attack.


keep us posted. awesome job!

 

Awesome work man... Im new to the forums and like to see this kind of work being documented... makes me hopeful for getting more done to my rides.

 

Hey - Can you please measure the exact OD of the rotor now after the shaving?
Also can you please measure how much more could come off without any part of the pad being empty? I'm approximating that the current OD of the rotor is 315mm and the free left-over space is 2mm. This would give us some "confidence window" for what brembo rotors would fit.

I think the best candidate right now is the 2002-2004 Crown Victoria rotor.

Also can you please measure the thickness of the rotor in mm.

(Exact as possible of course!)

 

Thanks for the comments again guys!

I'll get the exact rotor OD in the next couple days. I get the spacers tomorrow and should have her back on the ground. Unfortunately its 16 degrees right now in Detroit, so I doubt I will be road testing it any time soon.

 

Those are 12" even. Too small.


Maybe 94+ 3000gt rotors? 12.36" (314mm) and 1.18" (30mm) thickness. dunno about hat height, though.

 

Been busy, so I haven't had a chance to get the "exact" specs, but the 94+ 3000gt rotors look pretty close.

I did get my wheel spacers in. There is a tiny difference between the mounting surface of the hub and rotor, so I'll have to open up the back of the wheel spacers a little bit to clear that. The spacer pushes my rim out perfectly with great clearance for the calipers. I don't know how close they will be to the fenders until I get the car on the ground.

 

cool, thanks for keeping us up to date.
what wheel/tire setups do you run?

 

Those SA3's are NICE!

 

The Porsche Boxter and Porsche 911 (99'-08') will not work with adapters. They all use radial mounting which is quite different than the std? mount. The POrsches rear are all 4 pistons.

 

Thanks for clearing that up. I was not sure how they mounted.

 

You can make adapters to fit radial mount calipers to cars that come stock with lug mounts, brake companies do it all the time for big brake kits.

 

I made mount adapters for radial-mount Stoptech/Brembos to fit a friends FC (Rx-Ben) but it was a major measurement headache getting the caliper to the correct outside diameter and to the correct offset. not to mention the machining of the brackets was a days work and if you have to pay a machine shop to do it then you are better off finding some std. mount Brembos.

 

I got my 25mm spacers. I had to machine the center hole ID 1/8" out and 1/8" deep to get them to work. The mounting face of the rotor was 1/16" behind the mounting face of the hub. This prevented the spacers from sitting flat against the rotors. This did take long to do, I used a router with a wood bit. Aluminum is soft I got everything bolted up and set the car on the ground. The wheels were moved out 25mm, but don't look bad. I am more concerned about the fender clearance when the car is hopping around corners. If I have any issues I'll likely go with the Mariah Motorsports flared fenders. I think they flare them out 30mm and they are direct replacements.

There is still too much snow up here, so I haven't had a chance to road test the brakes yet. The pedal feels great though. Here are some pictures of what I did to the wheel spacers, everything bolted up and the top down view of the fender/tire after.

 

A slight roll and pull on those fenders should be good enough to prevent any rubbing you might have. Looks good!

 

or if you dont need all 25mm of spacer thickness just mill it thinner.

the mariah fenders can be junk at times, some people have had horrible luck with the fiberglass in them and others dont seem to mind. I would think the shinestreet fenders are better quality and the corksport overfender/flares are a lot easier if you dont mind that panspeed bodyline/appearance change.

 

Very thorough approach - looks like you're not leaving anything to chance. I can see people doing this even just for looks, let alone functionality.

Mods. please archive when thread dies down.

 

Very thorough approach - looks like you're not leaving anything to chance. I can see people doing this even just for looks, let alone functionality.

Mods. please archive when thread dies down.

 

^^ I have the fenders rolled already, but I'm still a little concerned.

 

Great thread and great progress! If you can measure the following dimensions it seems like we could pretty easily find a rotor that would do the job without needing any machining via Brembo's search by size catalog thing:

 

Not to sound like a Mariah employee as I no longer work with them on projects outside of their race cars, however the Mariah fitment issues have been addressed by changing up the glass molders lineup.

 

Did you ever track down the specs on the caliper pistons from the EVO FSM? I'm really curious how this compares on net brake system gain.

 

^ measurements I have taken

FC Stock Caliper Cup OD = roughly 1 1/4"
Evo Brembo Caliper Cup OD = little over 1 3/8"

Stock FC Rotor OD/Thickness = 10.5" / 7/8"
Evo Rotor OD/Thickness = roughly 12.5" / 1 1/4"

Here is the Evo specs from the FSM

 

i like your advans. do you think it will fit in stock rims?

 

I'd venture a guess that they MIGHT fit under some 16's, but you'll likely need 17's at the minimum.

Interesting, the Evo's got a more than 1" MC, maybe a 929 MC would be a worthwhile upgrade.