Well pumping up to 8 psi of fuel pressure in a pressurized tank I guess it has a few more pieces. I have one that I put in a Magic, I had it on a HYDE soft mount and the Magic weighed
4lbs 4oz RTF dry. It was insane.........

SAITO and YS engine are not even in the same league IMHO flying both. A YS 1.20 will outperform a Saito 1.50, I think it might be worth a look at the websites and view prop/rpm figures.

For even more input from someone, go post to Chip Hyde section in RCU, as he is loves this 3D stuff and is very politically correct when giving responses. He flies YS.63 in FLIPS? I think I read.