Question on the turbo formula sticky....

[Addict]

I'm not sure I follow the formula that's listed.
I used THIS CALCULATOR to get my CID.

1.6 Liters = 97.63200 Cubic Inches

(97.63200 x RPM x 0.5 x VE) / 1728 = CFM

What do I enter for my RPM?
How do I figure my Volumetric Efficency? I know the average is 0.8-0.9.

(97.63200 x 3000 x 0.5 x 0.8) / 1728 = 67.8

Alright. I'm guessing this is correct. So moving on to the next part.

Knowing the desired boost level, calculate airflow rate under
boost by multiplying the pressure ratio by the airflow rate
(NA-CFM). To figure out the pressure ratio take (14.7 + boost)
divided by 14.7

This lost me. Let's say my boost desired was 10psi.

(14.7 + 10)/14.7 = 1.6802721088435374149659863945578

That doesn't seem right. Though I guess it could be. What is the (NA-CFM)? Is this a formula too? Also where can I find a compressor map?

Heres a low and a high range for horsepower expectations

Low: 0.052 x CID x (psi boost + 14.7) = bhp

High 0.077 x CID x (psi boost + 14.7) = bhp

Low : 0.052 x 67.8 x (10 + 14.7) = 87.08232
High : 0.077 x 67.8 x (10 + 14.7) = 128.94882

Sorry if I sound stupid, I'm just trying to make sure I understand this correctly.