American Powertrain Hydramax install?

Uncle Ben said

EDIT: I realize I resurrected such an ancient post but I didn’t really see much about this in the first place so... here we are.

Yeah their clutch rod suggested location seems a bit too far up on the pedal arm. This, for me resulted in hardly any clutch pedal travel at all. Im thinking of redrilling a new hole closer to the pivot point granting more mechanical advantage over the Hydraulic cylinder pressure and a longer clutch pedal stroke. Will submit pics when finished

Click to expand...

This is what you need to do. I have already done this, hope this helps:





My calculations showed the pedal was 11.5" long -> and the pin was approx 2 5/8 from the pivot center, giving an approximately 4.3:1 pedal ratio. The clutch slave needs somewhere between 5.5:1 and 6.25:1 to have the correct travel and pedal modulation.

I cut the original piece off, welded on a piece of 1 1/4" x 1/4" bar stock lapped over the original and drilled a hole at approx 1.9" from the pin to get a 6:1 pedal ratio. I left everything on the other side for the down stop and also for the clutch interlock switch.

Been driving it with it like this for two years and the travel is just like the original mechanical clutch.