Budget 318 build

4° advanced lost 10 hp @ 4000 rpm but increased torque by 4 ft. lb. @ 2000 rpm.
Understood and thanks Mike. I've done the 4 degrees advance thing and found what it will do.... and don't think I'm not a believer in computing tools.

Forgive my ignorance but it has been a while since I ran that type of tool...what is different between the 2 sets of TQ/HP columns on the left of the table/graph?