stiff clutch

[threemcdonalds]

just finishing a5.0HO efi swap in my 1986 bronco 2. i stayed with the stock 5 speed manual trans. i used an advance adapters kit, early 80s truck bellhousing,throw out arm and bearing. 10in stock clutch cover and dodge 10in disc. i bought a howe racing style 7/8in bore pull type slave cylinder from speedway motors. i built a bracket from the frame and adapted the stock hose from the stock master cylinder and bleed the system. it worked but its so stiff that the fire wall flexes when the pedal is depressed. then it blew apart the little round shock absorber i think, that is inline right after the master cylinder. then i made a new hose from 1/4in hyd hose with crimped ends, but i think its going to blow out of the master cylinder from to much pressure. any ideas out there. thanks.

 

[Road Angels]

could be that the forks arm is to short not enough leverage, disc is to thick and its trying to push the clutch pressure plate fingers past center, due to the lowering the postion of the plate fingers with a thicker disc, also your slave to master pressure ratio may be off, if master is 1" piston with 50lbs of applied pedal pressure then thats 50lbs per SQ. inch, now you take that same 50lbs of pressure at the pedal and apply that to 1/2" piston that 50lbs now doubles the applied pressure by the 1/2" piston = 100lbs. big piston more volume less pressure, small piston more power less volume