76lxhatch

You can still get better than a sink to the floor pedal with a standard 1" master though surely? How does the fast fill valve work?

Bleeding those twin piston calipers always takes me forever, although I don't do it all that often, a pro would probably get it done quicker. The one on my HZ ute used VT calipers and that came up fine, currently working on the AU calipers for the Torana (Hoppers kit). The reason I mentioned bleeding is because it always gives me grief and I read what was written above as the extra push from the vacuum booster was sinking the pedal. It only has to be bled once to keep the pedal firm but it has to be done properly.

Edit: the Commodore master is different to the HZ and Torana though too, so maybe there's something in that?