M K

iTrader: (9)

i have just had a conversion done on the rear axle of the xr2 so i now run focus stub axles, handbrake,discs and calipers.

i run a wilwood bias pedal box and before fitting the rear discs the pedal was very solid, but now with the rear discs the pedal is alot softer, i have bled the brakes twice (with air pressure system) but still has alot more pedal travel before they bite, is this due to havin a bigger piston to move in the caliper than the old drum cyclinder

thanks
marc

Rich_w

Yes, the calipers require more fluid movement than the old cylinders. Try fitting a bigger diameter master cylinder.

One small thing though. Are the rear pads/discs fully bedded in yet. Might be worth living with the pedal for a while see if after 200m or so it gets much better. And check all your vac lines just in case.

HTH

TimC

iTrader: (1)

The bigger pistons in the rear calipers will make the pedal softer as you mentioned

M K

iTrader: (9)

thanks guys, i though it would be that,

Dangerous Malcolm..

I had the same problem when I did a RS2000 conversion on my Si. It actually failed the MOT on efficiency on the rears. I had to get a new master cylinder which was a bitch to track down but got a ATE one from Euro Car Parts. Was spot on after that.

costina

iTrader: (1)

The largests bore master cylinder is 25mm and is found on a S2 turbo escort it only has 2 outlets front and rear.

I had to use one of these on my cortina with mondeo cals on front and sierra cos on rear

Worked really well after


Paul

M K

iTrader: (9)

i am running a pedal box the so independant front and rear master cyclinders so that shouldnt need changing

polly_x

iTrader: (2)

Mark, as above running the same kinda system on the Westy. Move to the next size up master cylinder. Your probably on a .62 at a guess? Try a .75

Stu

costina

iTrader: (1)

Stu,do you have a link for pics of your car?

Paul