Tobias

As a matter of fact, I do! A friend at a reman facility made some tests for me on two different RRC circa 1985 pumps. Straight out of the car, one at about 240 000km and one unknown mileage: l/min@465rpm 4.0 and 2.1 respectively l/min@1500rpm 7.7 and 7.6 respectively pressure@1500rpm 56.0 and 55.3 Bar respectively After that the better one was boosted to 92 Bars and is awaiting assembly into the portal RRC once I get it running. Should help with turning the 38.5's... T

Try the inventor Tireloc Sadly the same story lies behind the Stauns as the SR handbrake. The Au distributor copied it and sells it as "an improved design". Tobias

I believ variable displacement pumps of he type discussed are prohibitively expensive. At least those I've found. e.g. a normal pump with magnetic coupling do be driven by belt from crank is about SEK4000 (£290-ish) A variable displacement is about SEK15-20000 (£1000-1300-ish) A two speed, like used for log splitters to get high no load speed for piston return and high power-low speed for splitting should work better in a drive-assist situation. They are almost twice as long as a normal and 50-70% mor expensive. A set of pressure val´ves switches automatically between highpressurelowvolume and lowpressurehighvolume pump stages. Tobias