The math on it actually kind of works. If I was making ~470 crank (before supercharger drive losses and transmission losses) on an M90 with an overdrive crank and 2.55" pulley @ 5500rpm, the straight-line extrapolation of that at 7,000rpm is 598. However, I'd say that's more like a 3" pulley, which drops it back to 511. The heads and other mods don't mean shit if the supercharger only puts out X cfm...that's your hard limit.
So I'd say it's narrowly possible that engine makes 561 crank HP, but where he would have come up with that number, I don't know. Even on an engine dyno it won't spit that out because there's no way he's making that AFTER supercharger drive losses, and he's certainly not making it without the supercharger. I tend to guesstimate my crank power by taking my fuel flow and taking into consideration my reported AFR to get an airflow and calculating power based on that. It leaves plenty of room for error, but at least gives you a theoretical ballpark.
So I'd say it's narrowly possible that engine makes 561 crank HP, but where he would have come up with that number, I don't know. Even on an engine dyno it won't spit that out because there's no way he's making that AFTER supercharger drive losses, and he's certainly not making it without the supercharger. I tend to guesstimate my crank power by taking my fuel flow and taking into consideration my reported AFR to get an airflow and calculating power based on that. It leaves plenty of room for error, but at least gives you a theoretical ballpark.
:rollpicard: 
:hsughr: 
:ugh2: :retard: :greddy2: :eek2: :jerkit:
