Aem wideband calibration

Derrick@art · Post by **Derrick@art** » Wed May 20, 2015 2:44 pm

Im trying to calibrate our wideband so it reads the same as the gauge on the sofware. and i cant seem to get it to work correctly. has anyone here done this before or can can anyone give me some insight on doing so.

This is the gauge we have and here are the instructions for it.
http://aemelectronics.com/files/instruc ... 0Gauge.pdf

Also i would like to hookup water temp to the race capture pro just wondering if I can tap off the stock mazda ecu temp sender?

Thanks in advance

momostallion · Post by **momostallion** » Thu May 21, 2015 12:35 am

I have my AEM wideband setup on my RCP unit.
I used the analog 0-5v white wire out of the AEM, connected it to one of the 7 analog inputs.

In RaceCapture's configuration, I set :

Channel Name: AFR
Sample Rate: 25hz
Mode: Mapped

for mapped, use 5 points of calibration. using your aem instructions for gasoline AFR, i would use:

0.0 0.94 1.87 2.96 4.05
10.0 12.18 13.74 15.92 18.10

that should do it.

momostallion · Post by **momostallion** » Thu May 21, 2015 12:41 am

if you tap off an ecu sensor, just test it with a multimeter first and make sure it's a 5v analog signal then simply connect it to another analog input.

you will have to scale it yourself however. i've done this as well. simply use a known value (read your temperature gauge at it's maximum range, hopefully it has a digital read out). build your own scale using 5 different voltage readings and temperatures and set that input's channel name to Coolant. wouldnt need more than 1Hz for coolant IMO.

also you could consider using CANBUS data from your OBD2 port. ECT is something that will be available.

Derrick@art · Post by **Derrick@art** » Fri May 22, 2015 3:37 pm

Thanks alot for the response i will try what you suggested and see if that works for me.