Big Brake conversion Problems

[japsportscarmad]

Hi i have 85 saloon with Xee fitter willwood 4 pots front and rear disks astra

Brakes bleed ok but peddle goes to floor.

Any ideas or how to solve

Thanks
Chris

[Will F]

If you dont have a leak anywhere - has to be master cylinder...

[Paul]

I bet theres still some air in there somewhere

[phazer]

Which end do you have the bleed valves? Top of the calliper or bottom?

[WBC]

Always top mate,

[Stuart]

Too much piston area in relation to the MC... it was specced to run a pair of tiny cylinders and a pair of pretty small single pot calipers. You are now asking it to run 12 pistons, of corse the pedal will be rubbish.

[japsportscarmad]

The front Willwoods have 4 bleed valves top bottom inside and out.

[japsportscarmad]

Deffo no air

Thanks Stuart

Is there sometyhing bigger that will bolt straight in or is it going to be a nouther weld bits hera and there job ?

Chris 07540 424 806 if you think of anytrhing.

Cheers m8

[phazer]

The front Willwoods have 4 bleed valves top bottom inside and out.

Ah, cool. Worth checking, I've seen no end of pictures on here and other forums with the bleed valve fitted at the bottom lol

[Benn]

Rear disc is messing it all up.

I've had the same probs as you. I now run a single line to the rear to give more pressure to the front. Do you have a bias valve inline to the rear? If you do try giving the rears only a tiny bit.

[mk1nova_rich]

Change to a proper bias pedal box...ie uprate your master cylinders to match the caliper spec

[japsportscarmad]

Rear disc is messing it all up.

I've had the same probs as you. I now run a single line to the rear to give more pressure to the front. Do you have a bias valve inline to the rear? If you do try giving the rears only a tiny bit.

Cheers boughjt a race twin pedal box so should sort it

[japsportscarmad]

Thanks for the help.

The Willwoods have bleed at bottom and top both sides as 4 pots