Calculating Hydroboost Travel

[steve aleve]

I wanted to see if anyone knows the best way to calculate the range of travel needed for a hydroboost pushrod? The hydroboost I have is off of an astro van and I have already measured the astro pedal to make sure to get the ratio the same, but now I don't know exactly where to set the pedal to allow for enough travel without putting the pedal too high. Hopefully this makes sense. Any help would be appreciated.
thanks!

[dwcsr]

The push rod inside the boost unit is 3-1/8 so it can't travel further than that, I would say as long as your 4" off the floor with the brake pedal returned your good.

[BBPanel]

Revisiting this - so are you saying the linear travel distance could be up to 3-1/4"? Will the m/c travel that far? Here are 2 pics of mine - at rest and when I depress the pedal. I only get ~1" of travel - it could go a little further but it is very hard to push. Steve, what did you end up with? -Bob

[BBPanel]

Never mind - found my issue - but now I need to find a shorter bullet spacer (to space out the HB rod to the MC. The one that comes with the MCPV-1 is ~1-1/4" long and I need ~9/16".