Frank Dalton, the PO had just the YBB engine dynoed by a race shop back in the late 90s or early 2000s at just shy of 200 HP. Engine crankshaft horse power only, this was before the Dynojet chassis dynonometers came on the scene. No print out just, a meter reading. My Elise was run an a Dynojet and printout was around 175 HP, expect the YBB to put out around the same. It should have the same performance as the Elise, final weight being the deciding factor.
My YBB motor is a normally aspirated running 45 DCOEs.