My earlier pedal box trials centered around replacing the original Ford Sierra pedal box with a pedal box from a BMW e46. These are nicely designed assemblies but required the modification of the Sabre mounting cross member and the pedal positioning was not ideal. Whilst pondering one day and looking at all the pedal boxes and pedals I have accumulated it occurred to me that it might be possible to mount a BMW clutch master cylinder to the original Sierrra pedal box which was designed for a clutch cable operation. I first removed all the parts associated with the cable connection and some parts of the pedal. I was then able to mount the BMW M/c on two 6mm spacers. (the box section spacers are temporary as I didn't have any suitable round tubing to hand). I also need to make and fit some nylon spacers each side of the m/c piston
eyelet.
Clutch Master Cylinder by
marlinpeter, on Flickr
My first trial was using the hole you can see furthest from the pivot (red bush) but this resulted in about 5" pedal movement so I drilled another mounting hole nearer the pivot and this gives me about 6" pedal movement which is more in line with a BMW pedal box. Shown hear in the fully depressed mode.
Clutch Master Cylinder(down) by
marlinpeter, on Flickr
Here the pedal is shown in the rest position. I need to devise and fit some upper and lower mechanical stops to avoid damaging the master cylinder and find a way of adding a return spring but the overall concept does seems to work ok.
Clutch Master Cylinder(up) by
marlinpeter, on Flickr
Because I'm using a remote dual circuit brake servo I needed to find a master cylinder with a fixed pushrod to attach to the brake pedal. This one seems to fit the bill and is from a Triumph Spitfire 1500.
Dual circuit master cylinder by
marlinpeter, on Flickr
This pushrod extension was provided by Marlin to extend a Metro servo pushrod. I plan to use it to extend the Spitfire master cylinder pushrod and attach it to the Sierra brake pedal.
Master cylinder push rod extension by
marlinpeter, on Flickr
And like the clutch, I need to add a return spring, etc.
Totally unrelated, I've bought some more seats.....
Slight change of direction. I had already bought a pair of Mk1 MX5 seats but they don't have the shoulder high seat belt supports. My Sabre chassis has rather low seat belt mounting positions that would fail the IVA regulations. The Mk3 MX5 seats have seat belt supports that raise the turning point. I believe the IVA will accept this as a solution as long as the seats are designed to take the forces.
Mazda MX5 Mk3 seats by
marlinpeter, on Flickr
On first look they look like they will fit OK but I'm not sure the design suits the car?
I've also been able to source a new Granada fuel tank locking ring from a parts supplier in the Ukraine! (autopartmaster)
New fuel tank lock ring by
marlinpeter, on Flickr
Isn't the internet a wonderful thing!!
....peter