Thanks for the response Paul and correcting my install.
Quote:
Originally Posted by Hydratech
Next, we have observed that the spacer bullet that inserts into the deep MC pushrod hole on the MCPV-1 to be about .090" - .115"~ too long most every time we have worked with one (and have passed this info along to CPP). You mention that you have .050" clearance between the tip of our MC pushrod and the spacer bullet inserted into the MC. Did you machine down the spacer bullet any?
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That is odd. Because I did machine .090" off the bullet after I measured with my install on the lower brake pedal hole (looked too logn). That gave me my .050" clearance.
Now when using the upper brake hole, it looks like that the bullet would be fine in length. I should have left the bullet alone as that would have now given me the correct clearance. As I am now about .090 too short.
Thinking of buying a new bullet to correct this.
Quote:
Originally Posted by Hydratech
I have baffled many any engineer that felt they had measured appropriately and completely by asking them how they factored in the radius of the round tip of our MC pushrod installed in the brake unit against the coned seat in the MC piston... Long story short, a flat MC pushrod against a flat MC piston seat could be measured in a simple fashion, but interfacing a coned seat against a round rod will toss most all quick measurements out the window as inaccurate. To cut though all the tech, unless you buzzed the pointed tip of the CPP supplied spacer bullet some, I believe you are up against a MC piston preload condition that is not allowing your pistons to fully release against the snap ring in the backside of the MC. How to nail it? Loosen the MC mounting bolts up about 2 full turns - if brake fluid starts dripping out of the ports on the MC just like it did on the bench = you have identified where your problem is and can now correct it and move on.  |
As far as measuring goes I measured from the tip of the Hydroboost rod and the valley of the bullet. I see your point and I'm probably off a bit. Do have a good way to measure this distance accurately? How long should it be? I think the one I got as 1.500" long from tip to back edge (Total length, not including coned seat)
I don't think I am under a preload as I can now feel some freeplay on the pedal before it starts to compress the M/S. Also it is very easy to mount the M/S I don't have to compress the M/S to mount it (if that makes sense).