Afternoon lads, i've just completed my front disc upgrade on my sierra xr4i and thought I would post the process on here as it is relevant to those using the sierra front axles. However i'm not quite sure on caliper spec on later models, I know that the xr4i caliper was also used on the mk4 rs turbo and granadas. I know that this is going over into overkill territory for the front of a seven - but then i know that some people go for show!

It was time to replace the discs on the front anyway so I thought why not upgrade rather than replace.Standard discs on a 4i are 263 (approx). I was quoted £120+ for the tarox 'monza' (?) range of budget grooved discs so thought i'd see what i'd get on ebay. Cosworth 2wd 283mm EBC grooved and dimpled. A set went for a stupidly low price of £52 but I still got a pair cheap at the £100 mark. Next up it was pads and I managed to get a set of Ferodo D2000 Fast Roads for £19.99 delivered although they did not mention they would fit an xr4i (only mk4 rs turbo). Finally caliper re-location brackets from Clint over at turbosport @ £40 delivered.

First off the original setup.


Size comparison:


The brackets were designed for relocating calipers on an escort (rsturbo etc) where the caliper mounts towards the front of the car - and also at a different angle to the sierra calipers.


The right bracket is how they arrived, the left has has a section at the top ground out to allow it to sit correctly against the upright.

Just to make sure it cleared I also took a little off the actual upright in the corner. The top upright caliper lug needs to be tapped out with a m12 x 1.75 to except the bracket retaining bolt from behind. The bottom upright caliper lug can be left alone as a bolt and nut go through.


Caliper bracket in place.


The caliper carrier needs some metal removed from a raised area in the middle which due to the new location stops it being bolted up flat on the new bracket.



Disc and carrier bolted up.


Time to compare the old pads to the new to see if I really need to fit the new ones


Still look like a bit of friction material on there......


Maybe not..............

Push the caliper piston back in with some clamps I picked up (Metal frames and cheap as chips from lidl) copperslip and pop the pads in.


Only the retaining clip to put back on but I need to put the other disc on as they are directional (doh!)

Bob's your uncle

Hope that may be of use to some of you.


Cheers


G

very informative for those thinking of doing it....well done
what a difference..they look great.

maybe even a link to turbosport selling the brackets would be handy too.


I went for 4 pot HISPEC calipers (good calipers but crap service) and 280mm grooved, unvented discs for the front of my Indy.

Bracket information and contact details.

Clint - Turbosport


Cheers


G

Update:

Great improvement in braking on the 4i - so expect that plus lot more on a lightweight seven!


Cheers


G

[Edited on 30/3/05 by Mr G]

nice one mr g!

i dont suppose you know what size the basic model discs are? i realised that some discs fit 13" wheels, but others (the 263mm ones on a 4x4) dont fit 13s.

cheers!

Thats right Joel the v6 4x4's came with 14's as standard for caliper/disc clearance.

Basic model disc size is approx 239/240mm

HTH


Cheers

G

Appendum.

Forget using spring washers.

Loctite required to stop the bolts going astray!

Now you tell us

v old post nut anyone know if these brackets are still made by anyone? looking to upgrade the discs from 2wd sierra size to 283mm.


thanks

DJ sportscars d. a bracket kit for using sierra standard callipers on cosworth discs.