Ive heard anything between 13:1 to 14.5:1 is ok at cruise. On hard accel shoot for 12.5:1 to 13.5:1 just what ive heard dont take this as a pro opinion please.

 

Bringing this back from the dead. My AutoTune has been sitting around for almost a year. Time to install it. What are you guys using for the target AFR?

 

I built a map using 13.2 steadily increasing until 14 in the cruise area. I wasn't happy with the results... I ended up loading Ivan's map, which is very, very rich and the bike ran 10x better and got better fuel mileage.

Ivan's autotune map is preset to 13.2. I raised the cruise range to 13.6 and AT wanted to lean it out considerably. I haven't accepted the trim yet... although AT did maintain the areas preset to 13.2, making me think the AT does get a pretty decent AFR reading.

One thing I did notice... Set your 0% and 2% throttle to 0. At 2% throttle, there isn't enough exhaust pressure to stop air from entering into the exhaust system. Sounds crazy, but I was getting VERY lean results at 2%...

Lou

 

Remember, if you have AutoTune turned on, the PC5 is running on the AFR table(s), not the Fuel table(s).

I used to think the PC5 was running on the Fuel table(s) and just suggesting the changes needed (Trims) to match the AFR table(s).

If you not convinced, try this: While the bike is idling, dramatically lean or enrich the AFR table cells it's using (turn on tracing if you're unsure which cells to change) and send ONLY the AFR table to the PC5 - you'll immediately see the idle change.

This proves that the bike is running on the AFR table(s) because no changes were made to Fuel table(s).

 

Poop

 

I know that it does not make changes until you accept them. What I was pointing out is that the bike is using the fueling from the AFR tables (or trying it's best to), not the Fuel tables.

I have a map 1/2 switch, that when AutoTune is enabled, becomes an AutoTune on/off switch. You can immediately see/feel when switching between modes if you make the dramatic changes to AFR table as I mentioned before.

 

You are correcto. I just did some research.

Basically, the "trim" value has already been applied to your map... just not permanently. By accepting the trim, you alter the base map to the "pretend" map autotune was just running on your bike.

So even though I haven't accepted any trims on my Ivan's map, autotune has already "tuned" the map to my AFR. Even though I haven't accepted it, auto tune has done it already. Pretty neat.

Lou

 

Yep. It's kind of hard to explain and visualize, sorry about that.

I just wanted to make sure you were aware that it was actually running (or trying to) run at the new AFR values you had entered.

I had a bad O2 sensor - AutoTune kept wanting to lean out everything and the bike was running like crap. Then I had an "Ah-hah!" moment - figured out it was running on the AFR tables AND leaning the bike out.

Here's a video I ran across after (of course) figuring it out that might help some visualize what's going on: Powercommander V Autotune switch behaviour - YouTube

I've been doing the basically the same thing you have, leaning out the cruise areas for better mileage, except I have tables for each gear.

 

How did you know your O2 sensor was bad? My AT keeps trying to lean everything out. I don't have any of the 9.99 or crazy high AFR symptoms though...

Lou

 

How did you know your O2 sensor was bad? My AT keeps trying to lean everything out. I don't have any of the 9.99 or crazy high AFR symptoms though...

I have Power Commander LCD Unit that I use to data log - it wasn't reading any weird AFR values, it was just reading values in the 14.6-14.8 for long sections of time.

I knew something wasn't right so I pulled 20% of the fuel out of an area of a table and logged it - the log still showed 14.6-14.8 readings in that area of the table, so that indicated a bad O2 sensor.

 

once you have a map you are happy with, take it to a dyno and confirm your AFR readings. I would love to know if my experience was an anomaly.

 

I've logged the bike's AFR with my Innovate Motosports LM-2 wideband and compared them against the AutoTune, something like that is never going to be exact, but they're pretty much in sync.

 

Was it only logging that high AFR in certain RPM or across the board?

Lou

 

There was no method to the madness, it was completely random. The logger does 10 samples per second and the inaccurate readings would go on for hundreds of samples.

 

Interesting. I'll check mine when I get home. Could you replicate it when the bike in neutral? Basically revving the engine?

Lou