3/4" master cylinder?

[icetech]

Soo.. been fighting with my brakes for pretty much 4 months now.. can't get over 650psi at the calipers although 1k at the MC.. I am just curious if anyone knows if there is a 3/4" MC that will bolt right into a b-body? with the ring to hold the pushrod in place would be great... did a quick search but can't find anything under 15/16 which i already have

 

[Don Frelier]

A 350 lb pressure drop makes no sense.
With essentially no flow the pressures should be identical.

 

[icetech]

A 350 lb pressure drop makes no sense.
With essentially no flow the pressures should be identical.

i know.. the calipers are brand new but i might just order another pair to try.. today i blocked off the passenger side line at the distro block and just tested pressure on the drivers side cause it's a short run, figured i might figure something out, nope...

flex lines are braided ones from Drdiff, the ones that came with this brake kit felt the same.. The only thing i haven't replaced is the calipers.. and i can't see how if they bleed fine that they would somehow cause the issue..

 

[icetech]

I made this earlier.. this was the fitting before the caliper.. I have to press pretty hard to get 700psi.. and really stand on it for 1k, but at least it made it.. measuring from the caliper i can't get past 650 at all. really weird..

Testing brake pressure before the caliper, can't get over 650 psi at the caliper although I can hit 1000 PSI before it. Trying to figure out why these brakes won't grab.

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[6872n73]

Distribution block restriction?