Hello. I am in the beginning stage of a splitter build. I have an LPW2A Lister Petter. I'm trying to find the optimum sized hydraulic pump for this engine. It seems that every pump I see is sized based on a gas motor running at 3600 rpm. According to the LP website specs. this engines sweet spot is 2000 rpm give or take a few. That puts the hp at close to 15 and the torque output at about 37 ft/lbs. This torque number decreases as the rpms increase up to max 3000 rpms and approx 20 hp . What size pump should I buy? I havent bought any other parts yet. The plan is a box wedge style and cycle time as fast as possible with this motor. Im thinking a 2 stage pump. I have done the math on some pumps and it seems right but I'm not really sure. I dont want to screw it up. Any experienced advice out there on this subject?