- Sep 18, 2009
It was a nice day yesterday so I made some final adjustments to my clutch linkage. I re-adjusted the spherical ball-end linkage so it better duplicated the stock upper push rod in length and position. Now I see better alignment with the pedal arm and Z-bar mounting points. But when I adjust the lower rod for good free play using the "gauge" hole, my pedal is on the floor at full dis-engagement. I even get some gear clash. If I get the pedal up off the floor, I don't have enough free play and I worry about the bearing riding the clutch fingers. I need better geometry in my linkage. The best place to get more push rod travel would be the clutch pedal arm by drilling a new hole farther away from the arm pivot, slightly below the stock location. But the thought of dropping the clutch/brake pedal assembly is so distasteful I won't even consider it. It would also move the rod lower and probably hit the firewall requiring making the hole bigger and then the boot may not fit. That leaves the Z-bar. The upper arm has a bend right where I would change the push rod mount so that is out. The lower end where the clutch fork push rod mounts is probably where the smallest increase in travel will result in the most travel at the throw-out bearing. Removing the Z-bar is a lot easier than the pedal hangers. My plan is actually something I read on another site where a guy made up a tab that he bolted to the Z-bar lower arm and then drilled a new hole on that for the push rod. There are two holes on the arm, one is a "gauge" hole and the other is the actual push rod mounting point. He bolted the tab on using both holes, and drilled a new hole at the end of the tab for the push rod. I like this idea because I can use different lengths of tab and mounting point holes to experiment with. This way I don't ruin the Z-bar by welding on something right away that may be wrong. I also know I need to not change the push rod angle too much or it will affect the fork. I know that increasing the length of the arm will result in more push rod travel but that will also increase pedal effort. But since I am using a diaphragm clutch that should not be objectionable. Once I get my needed travel, and the pedal effort is not bad, then I can weld the tab is place for good. Does this sound reasonable or is there a better way to get what I need?