evo 3 compressor map?

[eclipsegst1990]

here are some forumlas by which I figured out my efficiency. If there are any mistakes please correct them, it's finals week and everything is a blur..... I pulled the formulas from HCI and some of the approximations. I imagine with some different conditions, height above sea level (different air pressures at different heights), actual manifold temp, actual volumetric efficiency, and actual filter drop. The conversion from lbs/min to m^3/sec is my own creation, I did this to agree with Shape's graph.

GIXRMAN if you wanted to figure out what PSI you would get your best efficiency at that would require some serious rearrangement of the equations and back substitution. I would just try 3 or so points a high, low and medium and then estimate.

Second pic is where my calculations landed me on Shape's Graph.

I'm just curious, but is there a reason why 80% was chosen for the volumetric efficiency? I thought our DOHC setups approach the 95% range. I know this is pinching pennies, but it helps to know. BTW, what is the VE of the stock 4g63? Anyone have a stock dyno chart w/ 14b which could be adjusted for the cfm of the E316G or any other compressor. I'm just trying to make sense of this whole thing and I am also researching the same info that "gixrman" want's to find. I know this thread is old, so I'll try doing another search as well.


Thanks in advance