Does this make sense?

[BB911SC]

I have been trying to come up with a way to measure performance using my datalog files from the DTA unit as I map my engine. I created a dyno graph based on the following parameters:

Injector on time
Injector Max HP at 100% Duty Cycle [I used the standard injector rating (Bosch 803) adjusted for a fuel pressure of 43psi]
A/F ranged from 13.5:1 to 12.7:1 at WOT
RPM
Duty Cycle (based on injector on time)

Based on this data I came up with the following "dyno chart". Is this anywhere near an accurate measure of power?


At least, I think, the chart identifies holes in my map.

Any comments would be appreciated.

[Bill Verburg]

Looks like a cammed 3.6 chart to me.

By the way what cams are you using? Valves? ports?

[BB911SC]

Looking at my log, it seems like the engine gets better torque at under 13:1 A/F ratio. I will make some adjustments across the map and run the car to see if I can smooth out the torque. I also realized that I can make a graph of RPM vs. time and calculate performance based on the weight of my car. Any idea of the weight of an SC with carbon bumpers and a 3.6? I am travelling this week, but I will make some runs Friday and post the data.

[Bill Verburg]

Mines 2701 w/ a full tank, tools, spare etc.

Not going to answer any questions huh?