Join Date: Oct 2011
Location: Millersville, MD
Your Max HP and Torq numbers are gotten on a WOT (Wide Open Throttle) run on the Dyno. During this operation, you are not in a Closed Loop operation. i.e. AFR (O2 sensors) is ignored and the values for ECM are basically hard coded into the ECM. So the ECM does not really adjust the values.
During normal operations your ECM is running in a closed loop, meaning that your O2 sensors are feeding data to the ECM and your ECM is dynamically adjusting values to maintain your AFR. HD dealers normally keep the AFR to factory specs of 14.6.
This will result in a lean running engine and heat. So tuning for MAX Dyno runs is a different process than tuning for normal operations. This is why a tuner may spend several hours Dyno tuning your bike. He will put sever different loads on the bike at different RPM to simulate different driving conditions.. Like flat roads vs going up hills. vs slowing down..
I haven't used the Super Tuner in years and I know there have been changes in the software to use Lambda values vs AFR's.. This is one reason that I switched over to TTS..
Long and short.. your ECM is trying to keep your AFR around 14.6.. There are ways with the Super tuner to adjust that down so that you will put more gas in and less air.. AFR's down around 14 run cooler but gas mileage suffers.
Hope this helps you understand what's going on..
2010 FLTRX - Stage 4 SE 113 - MVA Heads, 10.5:1, SE266E cams, 58mm TB, 5.3 gr/s injectors, Polished and plated motor and trans and a few chrome extras. Fullsac DX Header and Freedom Performance Classic 4" Slip-ons. Titan II 6.5 speakers with RF PBR300x2, Monroe Airshocks
1996 Tail dragin' Fatboy