new $EE tuning thing!

[RobertISaar]

curve is going to be dependant on exact pulldown value and the sensor(or wideband controller or whatever is being read) itself.

typically, the a/c pressure sensor circuit is setup the same as a MAP sensor A/D channel, using a 51K pulldown. if you attach a 1K pot in place of the pressure sensor, any error is tiny, but if you were to use a 2K pot, you'll start seeing sag, a 5K is very noticeable and it just keeps getting worse. there seems to be good results when the pulldown is at least 40 times the impedance of the pot it is interacting with, or at least I was accepting that amount of error in my testing.

with a wideband controller making an analog voltage via either a digital-analog converter or just a PWM output run through a low-pass filter to approximate it(if there are other methods, I haven't seen them implemented in a wideband controller), hard to say what exactly any individual controller will produce without running it through some known values.

EDIT: a trick you may be able to pull off(not sure how easily) would be to model the differences that would occur with different pulldowns and maximum drive currents from the controller... I get the feeling that would be a bit complex though.

[steveo]

really, instead of a two-point calibration, i should have an optional three-point calibration. for example my wideband controller will output stoich for a particular fuel type when unplugged. that gives me a midpoint, and that should at least get it closer if i apply some curvature to it. i'm not great at math, but i'll fiddle around until i get it working.

edit: this will be next version stuff though, because holy crap i'm way ahead with features and way behind with testing.

[steveo]

more (beta 5): http://fbodytech.com/download/223/

one thing i've done in this version is (optionally) reduce display precision in the analyzer for fueling trims, yeliding a simple map of +2%, -3%, etc.. this allows a much more visually appealing and easier to work with map of your trims, rounding off tenths of percents that don't matter for VE tables anyways. also works for the new wideband vs afr target feature (if the patches work, of course)

some other cool stuff too, quite a few new settings....

details and changelog at http://fbodytech.com/3-6-beta/

[fbody_Brian]

Main tab trans display, gears 3 & 4 are reversed. It says I'm in 3 when in 4th and displays 4 when I'm in 3rd.

[steveo]

thanks, i'll fix that. i found the problem, i was reading this chart from the bottom up; and it's in a strange order. i'll assume that broke my shift selector since they use the same bits afaik

              SHIFT B  SHIFT A  GEAR
              ----------------------
                0        0       3RD
              ----------------------
                0        1       4TH
              ----------------------
                1        0       2ND
              ----------------------
                1        1       1ST
              ----------------------

[steveo]

i posted a fix: http://fbodytech.com/3-6-beta/

there are some other changes too, you'll have to download updated libraries to use this version.

[steveo]

yet another beta, major display performance increases as well as a facelift, bunch of other little stuff.

i actually bumped the version to 4.0 since there's a ton of changes.

it's looking good

please help test, will release soon

http://fbodytech.com/3-6-beta/