You are right, Chris. I ran 408. 8 hp with my 215 hp 12 valve using an old 18. 5 cm2 housing, stock 3" exhaust with Walker muffler, and torque plate of my design. No other mods. It is unfortunate how much some folks struggle with twins, drugs, etc. to make the numbers. As another example, several years ago, my 215 made 510 hp with one HX40, 4" exhaust, 370 injectors, my design zero plate. I ported the head and added the . 020" thicker head gasket, but these 2 things did not add anything on the dyno. Nothing else.
I hope everyone had a good time at the meet.
Best wishes