W2 408 Dyno results today !
Something is just not right...I'm not sure what it is, sorry I don't have any real ideas but I normally see .400-.430 for BSFC's on similar builds. If his meters are reading correctly, something is not happy. I hate naming things, because until you actually "see" the parts, like ported heads, and look at the machine work with the proper gauges and tools, it's just a guess. I figured if he dyno tests quite a few engines, he might have some insight for you. Get a pic of some of the plugs, and ex. ports if you can....