Really, Think someone told you that earlier.
Say your 520+ engine makes 700 hp with its compression ratio and methanol fuel naturally aspirated. You say you are making about 1200 hp with the two methanol dominators, and your roots blower. Fuel is passing thru the supercharger cooling everything.
I assume that you know you can't run fuel thru a Centrifugal Supercharger compressor housing without a carbon face seal on the compressor shaft. Maybe you don't.
So also assuming that the Two Electric Superchargers (making 230 hp each) or 460 extra hp vs the HP you are making now, 700 hp plus 460 hp = 1160 hp you are making 40 hp more vs your roots deal. With your 1200 assumed HP number the roots blower is using 100 hp to compress the air to 12 psi and move it thru the engine. 1100 hp driving the converter.
Like I said, simple math. But
You would now have to figure out how to cool the electric superchargers because you can't run fuel thru them easily. When they compress air they make a lot of heat.
Turbos have a oil system to remove that heat from the bearings inside them.
Procharger superchargers have a oil system inside of them. Vortech Superchargers use engine oil to cool them. So how are you going to cool the compressor housing and the bearings.
Maybe you could cool the compressor cover and the air with a special compressor cover.
Using A/C fluid or Water. Like this one
https://patents.justia.com/patent/6779515
Then you could ask the guy who came up with the patent how to make it work.
The guys who own the patent are Inventors: A. Thomas Vaught (Harper Woods, MI), Steve John OHara (Zionsville, IN).
I will not expect a check from you George because you would never send me any money.
Plus you would have to have a very special machine shop create the two cooled covers for the Electric Superchargers. You could make one copy of the cover but not two covers.
Against the law to do that. But that will never happen.
So you know something about running methanol fuel thru a roots supercharger, stick with that or put one of the toy electric superchargers on your wife's vehicle. Electric Superchargers for the most part are for part throttle acceleration improvements.
Once the Electric Supercharger boys have your money, you are on your own.
Tom V.