Novel FI Tuning Idea, I'm sure it's been done.... Options

[McMark]

I was thinking about graphs (see my Excel help thread) and I go to thinking about how to use this datalog information to help me see where my FI map is wrong. It dawned on me that the two major input for this KitCarlson system are TPS and MAPS. The result or output would be RPM. So if you graphed TPS on the X-axis, MAPS on the Y-axis, and RPM on the Z-axis you should be able to see where you've got problems. Of course you would have to average your readings over time since you would have a lot of repeat data in the cruising RPM range. What are your thoughts/responses to this idea?

[Jake Raby]

What I have learned in the past few weeks has taught me that the resolution of Dave's system increases the tuning difficulty a bit and that would make this much harder to do. I have tried it when I had the system in the 912, while I was very happy with it I didn't care for the values now that i have experienced SDS, Autronic and Haltech like a mad man for the past 7 weeks of DL-1 datalogging.

With the SDS I was able to only set a MAP value every 3rd RPM fuel value and then interpolate the ones in between to the point that the entire fuel MAP was done in only one dyno run. The MAP values were the same from the mid 14s to the low 1s range but on the dyno we can't set high MAP numbers because we lack a way to force the engine to decelerate at closed throttle.

Hopefully the 3D graph I am sending you as I type this will help.. It helped me to add my current values and then smooth the 3D graph and then upload those changes into the EMS. This is much the way autronic tunes their map values and I think MS as well..