Originally posted by Runutzzzzz:
"Stock" boost, No other mods.
I am assuming 6 psi, no other mod except turbo. 6 psi/14.7 psi/atmo = 0.408, so the maximum increase in hp with the turbo system is 40.8% and no more as the 40.8% indicates no efficiency loss at all (heating of air, efficiency on the cylinder head, etc). That means you car is putting 249 rwhp stock which can't be right either and that is assuming no loss. With loss, your stock car is putting out 260-270 rwhp. Also I would think you have custom headers for the turbo which would increase efficiency of the engine a little.
Is your 351 rwhp corrected rwhp and what elevation was it at? One can get alot more rwhp when dyno at elevation with a turbo car if the turbo can sustain the air flow. Supposedly the 911 turbo doesn't lose any hp until 8000 feet.
Anyway, I am not saying your number is not right, I am trying to say that tuners can easily manipulate dyno numbers. If I want to dyno alot of corrected rwhp on a dyno on a turbo car and assuming my turbo is large. I would find the highest elevation dyno shop and dyno there. I know for a fact my friend picked up 60 rwhp dynoing at Vegas vs. Houston on the corrected rwhp chart. He has a T-51 turbo that does not lose any power at Vegas elevation but the dyno correct for it.