Im tuning a friends car on S300 and everything is working great. I must say S300 is an incredibly easy to use and versatile system. I have only run into 1 problem thus far.

I've found its kind of a pain in the *** not being able to data log our AFRs so we can more precisely know what RPM, Boost/Vacuum and other what not all at the same time. Its more or less a watch the AFR and make sure they are around 11.0:1 across the board while in boost.

I want to be able to record lambda in Hondata and take advantage of either A. Manually editting tables using the Target Lambda and Change to Reach Target Lambda options, or B. Autotune feature which basically does the changes for you while driving.

I could really use these features as we're going to the track tomorrow and I have a little time to setup the wideband voltages for proper reading.

As of now I have run I believe the Blue wire to the stock O2 pin, and setup the Wideband read option in Hondata under Closed loop for that. I used a multimeter to check voltage at the wire and read AFR at the same time to setup in the Voltage/AFR tables but it spikes and lot on Hondata for some reason and its not giving me proper Lambda readings.

If anyone can help me out with this it would be awesome. I just need to be able to data log these AFRs to tune them in on the way to or at the track so I can save time when we take it to the Dyno and just worry about timing.

 

http://www.hondata.com/techplxwiring.html

It should be similar, only the AEM does not have a narrow band and Wideband output. You have to choose the output you want to use.