Okay ... Friday is a slow day at work ... so I started spending more time with Airflow calculations. If you are able to spin the Seadoo 215 compressor at 43k RPM, you can move 20 lb/s of air. (assuming at sea level). 20 lb/s should give you a pretty healthy boost. Per my calculations, as much as 12 psi @ 4500 rpm (not likely due to compressor surge line), tapering off to just under 3psi @ 7500 rpm. matrix below.
This sounds really good, may be too good to be true. In my opinion, limiting factor here would be:
Battery Current available for the TP Motor.
Compressor Surge line at lower engine rpms.
BTW @ Neutron256, If you are getting the TP Motor and haven't yet ordered it, I would recommend the 5840S-6D (
Link) over 5650-6D. They both have exactly same specs (Power, Peak V, Peak I, Max RPM, KV). However, the 5840S seams to have heat dissipation grooves etc.