Clyde, I had another brain f**t on the way home last night and thought of an idea that may work to give you that extra throw you are looking for.
Your zbar uses a stud on the input end, that if moved closer to the center of pivot will result in more throw. The new stud can be located some ratio closer, say 75% of the current distance. That would give you 1.33 times the current throw. 66% would give 1.5 times the throw, etc. You wouldn't have to remove the stud there now, just drill a hole, insert a new stud, and plug weld it in place from the back side of the bar. Sound reasonable?
You could either do that OR move the attachment point of the OTHER end of the input rod AWAY from the pivot on the clutch pedal. I remember seeing zbars and throwout forks that had 2 holes in each for use in mutiple applications that had different mechanical ratio requirements.
A last option is to weld a longer tab on the zbar output arm with another hole for a longer ratio. That might stick down too low under the car to be viable, but it's an option nonetheless.
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David
newbie #4153
