Here are some datapoints taken in N320DK, a Lancair 320 MKII.  I have a stock 160HP IO-320-D1B, Hartzell CS prop.  GW on this day was about 1645lb (empty weight is 1145lb).

 

Press Alt           MAP                 RPM                 Fuel Flow          % PWR            OAT (C)            KTAS

========        ========        =======          ========        ========        ======            =======

  6,300’             22.0”                 2300                   7.6 gph              65%                 14                   175

  8,400’             22.2”                 2300                   7.8 gph              65%                 15                   179

13,300’              18.2”                 2300                   6.6 gph              53%                  8                  184

  6,500              24.7”                 2600                 11.0 gph               82%                  15                  197

  6,500              24.7”                 2400                   9.7 gph              76%                  15                  194

 

Regarding the gear pump and pressure switches:  I have the “new” style switches installed because the originals that came with the 1994 kit were both bad.  I have never had the gear pump cycle while flying or taxiing.  In the hangar it will cycle if there has been a significant ambient temperature change since it was last powered up or it the plane has sat for a week or more.  Even then, it is just a quick burp.

 

Dan Olsen