Going to finally install mine today! I'm such a slacker lol.
I am still grey area on my other question:
"My other question, is what we set it to (The Fat Duc) the "commanded" AFR so to speak or the AFR we want the ECU to think it's running at? It's the later correct? I presume the commanded AFR can only be changed in the ECU like a car... "
If it runs in line with the o2, can someone who has tuned one of these tell me what the commanded AFR in the ECU is at these lower RPMs?
I suppose what I'm presuming is happening, is that say the ECU wants say 14.00 at 20% throttle at 3500 RPM. This Fat Duc is what we use to lean out the readings from the o2. So if the o2 is saying it's running at the commanded 14.00 AFR, we can lean that out and thus make the ECU *think* the o2 is giving a reading of 14.4 thus causing the ECU to give more fuel and give us an actual AFR of 13.6?
Is this correct?