Need rear rotor identification help badly! (Pics Included)

[MH88'Notch]

Hi, I have an 88 Mustang with a rear brake conversion that was installed when I bought the car about 5 years ago. I need to replace the rear rotors as I've machined them 3 times already and I have no idea what setup I have in the back.

It seems similar to a turbo-coupe setup but the rotors don't seem to match up to anything as near as I can tell. They are a 10.5" Vented rear rotor. The calipers are Ford so it's not a Caddy setup or something wierd. I had to replace the rear anchor brackets as the slide pins were totally seized and I ordered Tcoupe ones which were a direct replacement for what was on there before. It's a 5 lug setup as well.

The height from the inner face of the rotor to the outer (tallest) part of the hat is just under 2.5", but bear in mind they have been machined.

Anyone know what this might be?

Thanks!

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[Roland69]

they look like the same as the ones from the front on my 95 V6 mustang....the rear we a non vented rotor on mine

 

[jrichker]

Use 1990 Mazada MPV 3.0 V6 front rotors (10", 5 lug x 4.5" pattern, 2 7/16" offset ). While you are at the auto parts store, set a TC rear rotor side by side with the Mazada rotor and they are the same except for the offset.

The next step fixes the offset problem:
Use a Maximum MotorSports 1/8 spacer (MMWS6, http://www.maximummotorsports.com/in...roducts_id=576 ) between the inside of the rotor and the axle flange. The spacers may need to have the OD machined to fit properly. The stock rotor offset is 2 5/16" and the Mazada rotors are 2 7/16" offset. The 1/8" spacer puts the rotor back dead center alignment with the calipers

 

[jrichker]

If my above part doesn't meet your specs, I have an Excel spreadsheet that lists all the Raybestos brake rotors stocked by Rock Auto.They are a big online auto parts company with just about everything. The speadsheet is sorted by number of lugs and then rotor size. Put the part number in Rock Auto's online catalog and you get a picture of the rotor & the specs. PM me with your email address and I will be glad to send it to you.

 

[Aaron'S'tang]

You might want to try Stainless Steel Brake Corp. I have their Rear disk brake conversion on mine, might be the same.

 

[MH88'Notch]

Okay...I took my rotor to the parts store and compared it to a 1990 MPV front rotor. It does looks very similar as you said, but the diameter is still a little bigger than what I'm currently running. Do your rear brake pads fully contact the rotor using this setup or do they hang off the edge a little? If you look at the first picture I posted you can still see the wear mark from the pad and there isn't much area on the rotor that isn't being contacted with what I currently have.

You are using turbocoupe calipers/brackets on your car right jrichker?

Thanks again, Mike

 

[jrichker]

I have all the stock TC parts on mine. The five lug conversion is a future project that I am planning for.

I would put the Mazda rotor next to the stock TC 4 lug rotor and do a comparison. You'll find that the actual difference is so small that it doesn't have any real impact on the braking area.

I didn't spend much time looking at 10.5" rotors since the stock rotor is 10 5/32" diameter and the Mazda rotors are 10 1/16". The difference is small enough - 3/32" that it looked to be OK. When you think about it, you realize that the 3/32 gets divided by 2 because it is the diameter. When you look at the pad area, you are looking at the radius, which is 1/2 the diameter. The 3/32 becomes 3/64 of an inch, which is really small. The old stock TC rotor I have in my garage has a 2/32" wide area that the brake pads don't contact, so the whole thing should be a non issue with stock TC calipers and pads..

 

[5ive.oh]

nevermind.