What did you do to your Fiesta ST today ?

[Dialcaliper]

Where did you source the calipers? I've been wondering if the 986 would fit like the megane, I'm glad to see they do cause the Renault are getting hard to find...

Looks like the Renault calipers are the same 130mm bolt spacing, but it seems like they may protrude out further than the Boxster base calipers - it looks like the Renault used a 28mm rotor - it’s possibly a similar dimension to the Boxster “S” which also uses a thicker 28mm rotor and slightly thicker pad (and longer pistons), all of which are why I chose the Base 986 caliper to fit under my Dekagrams without spacers, since it’s made for a 24mm rotor from the start, and you won’t be overextending the pistons at lower pad thicknesses

As for the brackets, I made them myself. While I don’t have the time to make a bunch more, I do now have a full design and drawing that I could send out to have a batch made if there were enough interest. I’d have to price it out though, I probably would not be able to match the kind of prices I’m seeing online for similar adapters for other cars because I’m not buying in bulk, but I’m guessing it could be done for less than $400 a pair. Again, I’d have to actually send out for some quotes

 

[Grsemky]

Looks like the Renault calipers are the same 130mm bolt spacing, but it seems like they may protrude out further than the Boxster base calipers - it looks like the Renault used a 28mm rotor - it’s possibly a similar dimension to the Boxster “S” which also uses a thicker 28mm rotor and slightly thicker pad (and longer pistons), all of which are why I chose the Base 986 caliper to fit under my Dekagrams without spacers, since it’s made for a 24mm rotor from the start, and you won’t be overextending the pistons at lower pad thicknesses

As for the brackets, I made them myself. While I don’t have the time to make a bunch more, I do now have a full design and drawing that I could send out to have a batch made if there were enough interest. I’d have to price it out though, I probably would not be able to match the kind of prices I’m seeing online for similar adapters for other cars, but I’m guessing it could be done for less than $400 a pair. Again, I’d have to actually send out for some quotes

I might try rear calipers from an s as they use the 24mm rotor and currently are $250+ shipping for the pair

 

[Dialcaliper]

I might try rear calipers from an s as they use the 24mm rotor and currently are $250+ shipping for the pair

If you mean rear calipers from a Boxster S, the piston diameters are too small (28/30mm) which will kill your brake bias.

 

[TyphoonFiST]

Finished my own custom front big brake kit using bolt-on 300mm SVT Focus rotors paired with 986 Boxster 4-pot calipers on a bracket I made. Tested them out at a trackday last week and they made a big difference over the fading stock brakes + pads. Paired up with SVT rear brackets and 280mm rotors

Wheels are 16x8 ET42 Dekagrams - they fit just right without spacers.

More detailed writeup about the process here if you’re curious how it was done:


https://www.fiestastforum.com/threads/feisty-the-family-car.30825/page-10#post-522405

View attachment 67294
View attachment 67292

View attachment 67295

What spacer should be used with stock wheels? That is what everyone wants to know!

 

[Dialcaliper]

What spacer should be used with stock wheels? That is what everyone wants to know!

Don’t have my stock wheels anymore to measure, but I can tell you that you need at least about 2.25” spoke clearance measured out from the rotor to clear the spokes, which is the clearance on the Dekagrams. The SVT rotors sit at the same outer depth as the stock ones

However, I feel like the ticket for the stock 17” wheels would probably be to pair some 324x28mm Mk1 Focus RS rotors from the UK (Pumaspeed or EBay) with some C4/Cobra reman PBR calipers (the 2x38mm piston version). They are 2-pot calipers that might possibly fit with no spacers at all.

If multiple people were interested and felt like discussing it, I wouldn’t be opposed to putting in some prototyping on my off time. I’m just not prepared to front the money for the rotors, calipers and pads that I wouldn’t be using. For perspective we’re talking ~$100 per caliper from Rockauto and ~$200 for a pair of rotors from Pumaspeed. Probably $500 at the end of the day including shipping. (About the same cost as the used Boxster calipers).

It would also require several months of patience while I work out the details on my scant free-time (I have a busy day job and a family). It would make it easier if it were someone Bay Area local that had stock wheels to fit check, and again, infinite patience.

The setup I just made on the other hand, which could fit a number of aftermarket 16” and maybe even a few 15” wheels I could probably have something in a couple months with at least a few people interested.