So I have been reading up on compressor maps and I found this post.

Lesson 1 - determining the maximum potential output of a given turbo - and lesson 2 - determining how fast a turbo will spool on our engine - seem to be pretty straightforward.
Lesson 3 though, I'm pretty "lost" here. It uses the same formula/calculator as above.
So basically if I have a B16A2 then my CFM at 8 psi would always be the same. (1.6*8200*90*1.54)/5660=~321 CFM.
And if I use the given formula for potential HP then 321/1.427=~225 hp. No matter what turbo I use at 8 psi my potential power output is 225 hp? Surely something's fishy here.

Would anybody care to explain what I'm missing?

 

Calculate CFM (I convert to lb/min as compressor maps are usually scaled in lb/min of kg/s) for the engine in normally aspirated state
Calculate Pressure Ratio (Ambient pressure + boost pressure/ ambient pressure) > Assuming sea level and ambient presssure of 14.7 psi that is [14.7+8/14.7 = 1.544]
Multiply the NA Airflow (CFM value) by the Pressure Ratio

So 321 CFM x 1.544 = 495 CFM

495 * 0.07 = 34 lb/min

I'm assuming your Airflow calc is correct, I didn't check your formula or maths there.

 

Thanks, yours is definitely a more userfriendly formula so I'm gonna use that in the future. (I calculated the CFM with 8 psi boost already, by the way)
What I'm not getting is how this formula helps me to calculate my potential power output at the SAME boost level with DIFFERENT turbos.