Thats the piont i was trying to make in an earlier post about how much power is lost thru out the curve if your timing is locked out. Didnt get a good answer on that at the time. But it is easier to just lock it out and forget about it. I was just curious to how much could possibly be left on the table thru the rpm band with a pump gas 511 without a curve built in. How do you figure best curve?