Excessive pedal travel on rebuilt S callipers, but car stops fine Options

[phillstek]

Just finished rebuilding the front callipers with new pistons and seals. Bled them 3 times including power bleeding but the pedal just won't come up. It feels like half the available pedal travel is in free motion before the brakes engage.

Car stops without pulling or locking up and the pedal pressure holds when stomping on them but I would prefer to have the pedal engage pretty much as soon as I hit them.

Any suggestions on possible cause and what I need to do to fix it?

Thanks

[brant]

eric beat me to it...

knock back mechanisms

I vintage race on S calipers and mine are removed.

sometimes the initial pedal is still long
but once you hit it, no more "flex" feeling
I honestly believe that all of the hype over "flexing" is really the spring effect of the knock back mechanism and mis attributed all of these years.

[THE STIG]

eric beat me to it...

knock back mechanisms

I vintage race on S calipers and mine are removed.

sometimes the initial pedal is still long
but once you hit it, no more "flex" feeling
I honestly believe that all of the hype over "flexing" is really the spring effect of the knock back mechanism and mis attributed all of these years.

Opened them up tonight, found these knock back mechs in place, and a rolled piston seal. That'll do it. Ordering kits from FPS tomorrow.

Who are you running with? Just did my first HMSA Club Event at Laguna. I had a blast.

THE STIG