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Cosworth 4 pots under 13" rims and drum to discs!
SeanStone - 23/1/10 at 06:23 PM

Is there a way of getting sierra cossie 4 pots under 13" rims? Changing the way they're mounted and with smaller discs?

Also, what's the best way of converting the rear drums to discs?

mcerd1 - 23/1/10 at 07:18 PM

quote:
Originally posted by SeanStone
Is there a way of getting sierra cossie 4 pots under 13" rims? Changing the way they're mounted and with smaller discs?

not that I know of, but why would you want to - the cossie calipers weight a ton
here are smaller calipers that should be more than upto the job

quote:
Originally posted by SeanStoneAlso, what's the best way of converting the rear drums to discs?

that depend on which type of axle you've got (ie sierra, escort, etc........)

[Edited on 23/1/10 by mcerd1]

deezee - 23/1/10 at 07:21 PM

Agree, needs more info about what chassis / running gear this is for. Also why go to smaller discs to fit a big caliper in? Its going to be less effective by loads! Can't you pop in some AP Racing or Wilwoods?

SeanStone - 23/1/10 at 07:55 PM

It's a sierra 7" lsd. Putting in an s2000 engine and box.

I plan to go for wilwood at the front but i cannot afford rears too, i am a student!

mcerd1 - 23/1/10 at 07:59 PM

if its a sierra LSD (not an aftermarket LSD) then don't you have rear disc's already ?
(assuming you've got the whole axle that is)

also if your on a budget - do you really need 4 pot front calipers ?
alot of people recon that the standard sierra calipers with some decent pads are more than up to the job
(you can always change them later once its on the road)

SeanStone - 23/1/10 at 08:10 PM

Well considering getting some new standard sierra brakes is around 70+ a corner, going wilwood is an extra what, 100 quid?

No I don't have rear discs. I bought the car already built and road registered but in a non completed state so I didn't have to go through SVA.

SeanStone - 23/1/10 at 08:28 PM

These likely to do the job at the front?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=310196321635&_trksid=p2759.l1259

mcerd1 - 23/1/10 at 09:08 PM

quote:
Originally posted by SeanStone
No I don't have rear discs. I bought the car already built and road registered but in a non completed state so I didn't have to go through SVA.


are your driveshafts 'bolt-on' at the diff end and 'push-in' at the wheel end
or 'push-in' each end ?
(or have you got some pics)

your biggest problem with bigger brakes is going to be the size of the wheels (front or back)

the rear discs (inc conversions) struggle to fit under 13" wheels - I think only a few types of wheel have enough space


^^ those calipers would fit the sierra front hubs no problem (same ones as I've got)
but they have 14" wheels over them on the sierra's (I'm using 16" rims)

just to give you an idea - dax do an upgrade kit for the fronts. they use the standard 240mm vented type calipers, but mount them with spacers over the larger cossie discs
that way the increased lever length of the larger disc gives stronger braking despite still using the bog standard calipers - and your wanting to go the other way



I know the small front brakes and rear drums don't seam that good, but the car weighs alot less than they were designed to stop - you can just fit some good pads/shoes, try it and then decice if you need upgrade

RAYLEE29 - 23/1/10 at 11:04 PM

Hi, firstly the front end you can fit bremsport m16 four pots with 2.8i capri discs under 13" rs four spokes obviously you'd have to look at the offset for disc and caliper mounting for whatever upright your using sierra csworth calipers just wont be worth the hassle
rears you can use sierra/granada calipers with fiesta front discs under 13" rs four spokes
I know this as i have these set ups on my cossied mk2 escort and also looked at putting cossie four pots on the front of my haynes roadster but they wont fit without cossie uprights and at least 15" wheels oh and they are very heavy too
Ray

[Edited on 23/1/10 by RAYLEE29]

SeanStone - 24/1/10 at 04:25 PM

What about the xr4 calipers? Would they fit? (fronts). I already have the cosworth calipers and discs fitted, do they have a different upright to that of the standard 2 litre?

[Edited on 24/1/10 by SeanStone]

mcerd1 - 24/1/10 at 08:37 PM

the XR4 calipers use 260mm discs and fit under 14" wheels


the cossie hubs are different (geometry, bearings, etc...) - the 4 post calipers fit on with M12 bolts that are threaded in the upright (the normal ones use M10 bolts with the threads in the calipers carriers)