wbo2 Gauge and Evoscan Datalogs not completely in sync...

[NOMIEZVR4]

So I've been datalogging my wbo2 for a while now and just recently started tuning the car. I noticed at WOT the gauge shows .2 to .3 AFR leaner than the datalogs in evoscan. I know people mess around with the formula in evoscan and get both numbers completely in sync, just wondering if I should attempt to mess around with the formula and secondly how its done.

I have an Innovate MTX-L logging thru pin 93

Wideband scaling

0.0196078431372549
0.9803921568627451
2.019607843137255
2.980392156862745
4.019607843137255
4.901960784313726

These are the associated afr values.
7.3762
10.3231
13.3954
16.3423
19.3519
21.9853

[NOMIEZVR4]

EDIT: Ok I figured out how to change it, I'll mess around with it and report back to you guys. FYI, just right click the value on evoscan and then click on edit data items..

[TwIzTeD_3kGt]

I have the same issue and wasn't able to find a scaling I liked, so I just keep in mind that it's .3 afr off.

[Greg E]

There's a voltage offset caused from different grounds. Correcting for this offset is easy. Just add or subtract the offset from the EVOScan WBScaled formula. I'll post better instructions for this later.

[NOMIEZVR4]

There's a voltage offset caused from different grounds. Correcting for this offset is easy. Just add or subtract the offset from the EVOScan WBScaled formula. I'll post better instructions for this later.

In for results...In the meantime I'll screw around with it myself.

[TwIzTeD_3kGt]

There's a voltage offset caused from different grounds. Correcting for this offset is easy. Just add or subtract the offset from the EVOScan WBScaled formula. I'll post better instructions for this later.

Got it. Thanks!

In for results...In the meantime I'll screw around with it myself.

Right click "Wideband Scaled" then "edit data items" in Evoscan. At the end of the formula in the right-hand column there's a +7. Just reduce or increase that number by however far off your datalog is vs. the gauge. I'd suggest doing this with the key on engine off after running the engine. Mine was reading about .2 afr high, so I changed the +7 to +6.8. I then fine tuned from there and ended up with 6.79. Now it records accurately.

[NOMIEZVR4]

Got it. Thanks!


Right click "Wideband Scaled" then "edit data items" in Evoscan. At the end of the formula in the right-hand column there's a +7. Just reduce or increase that number by however far off your datalog is vs. the gauge. I'd suggest doing this with the key on engine off after running the engine. Mine was reading about .2 afr high, so I changed the +7 to +6.8. I then fine tuned from there and ended up with 6.79. Now it records accurately.

Yep..that's my plan..thank you sir!