Goren reports that guys in Europe have claimed 600 HP, I assume at the flywheel, though I'm sure they've modified the base engine (pistons, rods, etc.) at those power levels. But 224 HP and over 300 ft. lbs. out of 2997 cc's (like 182 CID or so) (I just looked it up - just under 183 CID) is a TON of power from not a lot of displacement.

A somewhat milder pump and maybe a slightly less modified turbo should get this engine in the 175 to 200 HP range with great reliability and street manners. Mine really wouldn't be happy chugging around town.

Dan