Got a little info from my buddy this weekend. It's been three years since he messed with the tuning on his pump, but here is his 2cents. He first ran and tuned the engine bypasing the pump and taking notes on the RPM with a tach.He then plumbed in the pump. Then leaned out the carb 1/4 turn. Then started the engine and used the pump to increase fuel flow until his tach readings matched the non pumped readings. The few lines of advice here
is the result of many hours of trial and error. His is on a FA-18 pusher that required a leaf blower for cooling while all this was going on. He also said he ran it with and without the Perry carb and on two diff engines.On the ASP the Perry carb worked best, on the Super Tigre the factory carb worked best. His biggest problem was keeping the thing lean enough. The pump worked to well and tried to flood the engine. He cant remember exactly
but thinks one turn off bottem on the pump is all it took. hope this helps, later daveo