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.
Quote:
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?
Quote:
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.