Lose clutch pressure after hard runs

[xcelr8n]

hey guys, hav a act2100, about 5,000kms on it... feels good all the time during normal driving, but if i shift a couple of gears really quickly or really hard, my pedal pressure will decrease, if I pump it a couple times it goes back to normal...
Im thinking hydraulics, but the master isnt leaking anywhere from under the dash, and the fluid reservoir has remained full all this time.

 

[TurboATM]

i am having this same problem....its bad on the highway, and horrible when staying above 70 or 75 for more than a few min....i have an ACT 2100, 8lb fidanza flywheel, (installed last sept) just replaced the master cyl. in Dec. bc i got stuck out on vacation with this problem when it all of a sudden happen...now im back on vacation in the same place, and i have the same problem.

i have bled the line, but after reading up on a fewthings, dont think i did the best job. In the morning im gonig to do all steps to the T and see what happens then...

 

[xojaycavox]

anything on this? any updates or what you guys think from here?

 

[boostedgsx1997]

I have friend with same problem. With ebay 2100 ACT clutch.....