Anyone Running Ford RS Calipers?

Maryland_Speed3

Maryland_Speed3

Greenie N00B Member
Greenie Member
I'm wondering if Ford RS calipers will fit our car and have a strong suspicion that they do. Just wondering if anyone has done this yet and how to get around the 5x108 PCD and different center bore issues?

I just went to the junkyard today and picked up some Mazda 5 rear caliper brackets for $8! I know the ST guys can do the Mazda5 bracket trick too which got me thinking about Ford interchangeability.
 
I know our calipers say FordMotoCo on the backs of them, but if my memory serves me correctly, there was a large thread on the old forums about using Volvo brakes or something. It might have been about efforts to get CTSV brakes to work I'm not entirely sure.

If it was me I'd be making moves to get v70r/s60r brakes to work because I think we share a little more in common.
This is all speculation and be trying dust away the cobwebs from what I've read several years ago so I could be mixing 2 different threads.
 
yup CSTV on the old forum. only info I've seen ref focus RS was using them on a ST nothing about on the speeds unfortunately.
 
The Volvo connection is that even though the calipers were different they used the same or close enough size brake pad which appeared to be similar to the stock ms3 compound but much cheaper
 
I did some research yesterday. The Mazdaspeed has a center bore of 67.1, Focus RS has a center bore of 63 and there is a difference in rotor size, 11.something for the speed and 13 something for the Focus so you'd have to figure something out for the rotors to use those calipers.

Maybe the best option would be to use wheel bearings/hub from a Focus in order to drop the center bore down for the rotor.

But I think they could work. Your main issue is going to come down to the rotors. One of my co workers has a Focus ST, I think a 2016 model. I will throw his car up on a lift tomorrow and measure the distance between the caliper mounting bolts to see if it is close to ours. I'm more than certain it probably is cause all the Ford/Mazda focus, edge, tribute, fusion etc look like they have all the same spindles and suspension design.
 
ah, thank you for the correction. That makes a little more sense.

Did anything ever come of the CTSV brake endevours?
 
IIRC there were custom caliper brackets needed, never enough interest to generate a group buy for someone to actually start selling them.
 
Hi everyone, long time member first time poster. Not to revive a dead thread, but I did some research as of late and wanted shed some light on the Volvo S60R/V70R calipers. So amongst my research it is very possible to mount them on the Speed3s HOWEVER for a 4 brake set up, need an additional parking brake mount. Here’s what I’ve gathered:

- Volvo XC90 can fit S60R calipers
https://www.swedespeed.com/threads/s60-v70-r-brembo-brake-swap-how-to.380713/

- XC90 calipers can fit on a C30 front brakes
https://www.reddit.com/r/Volvo/s/TS85RDNLsB

- Mazdaspeed3 calipers can be swapped onto the C30
https://www.swedespeed.com/threads/...brake-caliper-upgrade-for-c30-s40-v50.352761/

- Volvo bolt patterns are 5x102 for the S60R (uses a 330MM rotor)

- 2004 Ford Cobra SVT has a 330mm rotor (which clears the rotor) with a 5x114.3 bolt pattern BUT a 71mm center bore (might need to be drilled out)

In summary, it is theoretically possible to use
the S60R/V70R calipers with:
- S60R/V70R calipers (front)
- 2004 Cobra Mustang SVT rotors

I might do this in the near future as a side project. But in case someone has some those brakes lying around and wanna try it out. IT COULD WORK.

*edit is there anything I might have overlooked that someone y’all see?
 
Do you know if the offset on the mustang rotor will work the the caliper mounting brackets
 
Easter Bunny said:
Do you know if the offset on the mustang rotor will work the the caliper mounting brackets
Click to expand...
So, I grabbed the Centric C Tek rotors for comparison

the Cobra SVT
upload_2024-6-1_10-4-34.jpeg

Mazdaspeed3
upload_2024-6-1_10-4-56.jpeg

XC90


S60R


Based on the given information COMPARED TO THE COBRA SVT ROTORS
The major differences lie amongst the:
- discard thickness: 3.4mm bigger than speed3
- nominal thickness: 3.0mm bigger than speed3
- overall height: 4.9 shorter than speed3

*I noticed the vane style being different, not entirely sure IF that is a major driving factor for fitment.

I’m no expert by any means, but would you think the measurements are small enough to be negligible?
 
Last edited:
So I started down this rabbit hole a while back in search of a 4 piston caliper (OEM spec Brembo) that would work on the Speed. With the goal of creating something cheaper than just getting a Brembo or Stop Tech kit I gave up and just ordered the CorkSport calipers to run on the OEM rotors and said good enough. My car doesn't get tracked and really all I was after was a nicer looking caliper.

I do like where you are going with this as it did drive me nuts and what I came up with was having to design and manufacture an adapter bracket for some of the calipers that "could" work. It def seems like you have found a viable bolt up option potentially though.

At this point I think you are going to have to physically mock things up to see how they work.

Something else to be aware of is how your stock master cylinder is going to handle those brakes. I'm sure @Easter Bunny could shed some light here or point you in the right direction.
 
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