I don't know offhand about the adjustment,but the speedmaster I used to run pumped a fair amout of grease,up to the point where it would drip off the chains up in the delivery.
The only thing I could think of offhand is are you using the correct lube? The monkey snot grease that we use is very thick,I imagine if you were using an aftermarket supplier,that a thinner grease would sling even more.
I know on our CP tronics screen it was set to pump at a preset amount of revolutions,I don't know if that can be changed or not.