W2 408 Dyno results today !

mbaird said
I was hoping for around 550 hp but could only muster 493 .
Torque was good running 428 ft-lbs by 3800 and 482@ 4700 !
Power dropped off abruptly at 6200 which surprised me for W2 heads.
View attachment 1715816539

That's the 4" stroke. My 416" pretty much tops out at 6,000 rpm. Prior to that I had a W2 3.31" stroke 340 that was shifted at 7,200.