gus

iTrader: (1)

im currently running a hi-spec 335mm bell and rotor

and im looking to drop down a size to 315mm

do i need to replace just the rotor or is a new bell needed also
(obviously brackets also)

rog

iTrader: (2)

Sorry mate, don't really understand what you mean?

gus

iTrader: (1)

do i need new bells

is it one bell fits all

tabetha

Almost definitely no bells needed, just the discs, there's two main bells according to spacing/number of bolts on sizes around this, just phone up and ask for some.
tabetha

dave cos4x4

iTrader: (5)

so if no new bells are needed, does that mean the pad will hang over by 20mm or the disc will have 20mm not getting used.

-beefy-

iTrader: (6)

if i read that right gus your looking for a 10 mm reduction on your disc size ?

id gues the bell you have would be capeable with that , literally getting a smaller od disc ,

id check the clearance from top of pad to disc and have your brackets machined down accordingly if need be fella


beef

J1mbo

iTrader: (1)

im sure they will be fine, we changed disks on the rear of the escort cos from 315 to 330 and used the same grp a bell, but could be wrong with the new disk and bell arrangement, get some measurements off the 315 disk before you buy if you can

martin @ reyland would advise you best give him a call he wont mind measuring up

dojj

iTrader: (3)

either way, yo uwill need to get some new brackets sorted otherwise your calipers will still be further out than you need them to be

-beefy-

iTrader: (6)

or you could have 10 mm machined of the top of the bracket where the caliper mounts , and reduce the length of the bolt ?

befe

dave cos4x4

iTrader: (5)

335 down to 315 is a reduction of 20mm.

-beefy-

iTrader: (6)

apologies dave

thers me not looking properly again





beef

Luca

iTrader: (2)

Gus you will need to change the brackets...
Im guessing your rear calipers are lugged not radial mount.

If radial style then you can just have the bracket machined down to the desired reduction as per new rotor.

The bells are the bit that can stay put.

dave cos4x4

iTrader: (5)

so...if you lower the brackets by 20mm....and the caliper moves in 20mm yes....then if the bell stays the same size....then the pad area on the disc MUST be smaller...hence the pad hanging over.

yes...no lol.

gus

iTrader: (1)

cheers for replys chaps

luca im on about the fronts not rears,

knew the brackets would need to be made again (will keep the ones i have now, so can run bigger disc if i wana)

dave thats why i asked, if moved calliper in 20mm would there be enough room on the disc? or would it hit bell

i will phone hi-spec in the morning, just wondered if anyone knew

rog

iTrader: (2)

Ah that's better, I understand now!
As far as I know the inner radius is the same, so you should be okk depending on the size you have, but as a simple guide i'd measure the edge of the cliper/pad to the edge of the bell, if you don't have 20mm then forget about it.

TimC

iTrader: (1)

Dave/Gus the caliper wouldnt need to be moved in 20mm, only 10mm if going from 335 to 315. Think Radius and not Diameter with the caliper.

As for keeping the bells, that depends on the specification of the new rotors and the relevent pcd they require the bells to be

stu21t

exactly, your losing 20mm overall
thats 10mm top and 10mm bottom, so the caliper will only need to move 10mm inwards.
and i dunno about hispec but wilwood only have to different bell sizes, so chances are youl just need new discs.

rog

iTrader: (2)

Good point

Luca

iTrader: (2)

Is your caliper radial or lugged?

TimC

iTrader: (1)

With 335mm disks its unlikely it'll be lug mounted Luke

Luca

iTrader: (2)

Dependant on caliper choice?

Focus RS calipers are lugged with a 324mm disc

TimC

iTrader: (1)

Wanna put a wager on it? £5

dave cos4x4

iTrader: (5)

ah yes i see that now Tim, but even 10mm off the disc size, they may be pad over hang.

TimC

iTrader: (1)

Agreed. Its all about getting the right mix of parts for the aplication.

dave cos4x4

iTrader: (5)

ah yes i see that now Tim, but even 10mm off the disc size, they may be pad over hang.

dave cos4x4

iTrader: (5)

ah yes i see that now Tim, but even 10mm off the disc size, they may be pad over hang.

Ridgey

iTrader: (5)

I have just done this (335 to 320) with my Compbrake kit to allow 16" wheels to be used on track.
Speak to NutRus.

If you wish to run the same caliper and pad you'll probably need a 7" bell instead of 8". New disks and bolts.
You should be able to get the caliper bracket machined down to bring in the caliper the appropriate amount (so no new brackets needed).

TimC

iTrader: (1)

What 16s your running now Dave? im trying to get 325 (or close as poss) behind 7x16 MOs ET35

gus

iTrader: (1)

dude you got a ball park figure for what it cost

i will use new brackets tho as i hate mine

TimC

iTrader: (1)

Gus are your calipers lug or radial mounted? Have money riding on this

gus

iTrader: (1)

who's the bet with?

if its that lego haired queen from pompey way tell me which you went and i will go with that

Luca

iTrader: (2)

(As I attach my lego claw with baseball bat and fit lego helmet)

TimC

iTrader: (1)

Its that lego haired, lycra jean wearing, flipper slipper footed pompian pompus.

I reckon the calipers are radial mounted btw, even though I dont have a clue what calipers you have lol

gus

iTrader: (1)

yes you are correct now pay up queenie

gus

iTrader: (1)

damm just found this pic in my photobucket



without seeing in person i will say i need new bells aswell

TimC

iTrader: (1)

Got any from the top?

Think thats 100% new bells and rotors

dojj

iTrader: (3)

new bells

Micky

And with everything on youre car top-notch,why spoil it with lo-spec brakes???I'd be giving Martin at Reyland or Tony(nutsRuS )a call.Micky