Tuning Anomalies using TuneECU and wideband

Yep. Not happy with the stock tune or the ones I have found online, so I figured I'd do it myself since no one here on island is even remotely interested in doing it, and there are no dynos here capable of holding a load at a give RPM to tune the part throttle areas.

Figured learning what I can while it's stock can only benefit me later when I starting changing out parts and have to retune it.

Edit: I don't give a single care to the life of the cats from running it more rich than stock under WOT or heavy load cruise. If they die its just a reason to upgrade exhaust sooner.

So I have made a few revisions after looking more closely at the stock tunes and a few others. Not sure why I didn't anticipate this, but every revision I make the F table shape resembles the tunes I used to build my starting tune more and more, though the height changes, the shape gets closer and closer.

I setup the AFR table to actually pretty closely reflect the AFRs I am working to get to.

I recently read that it is common when loading a dyno developed tune and then taking AFR reading on the street that they are richer on the street than they were on the dyno. This is proving to be true and at this point it is just a process of leaning the 70% areas out daily as I do logs to creep up on my target AFRs.

Once I get it exactly where I want it I'll post the final tune with the Dyno sheet attached.

Final post in this thread regarding tuning, I have made a couple of rather interesting discoveries that I haven't seen documented elsewhere yet:

1) I am not sure if this applies only to the new ECU bikes, but, when you run a gear out to redline and let off completely from the throttle, the motorcycle has a "decel fuel cut" function that completely cuts fuel until RPMs come back down to 3000. It cannot be tuned out, it will fully cut fuel when the throttle is at 0%, map is below 250hpa, and RPM is over 4000. It's not a problem, but it does mean that you cannot ever completely tune out decel popping, there will always be at least 1 pop with an open exhaust coming down from high RPM with the throttle closed, it will pop when going from decel fuel cut back to fueling and the exhaust passes through the magic ratio required for ignition in the pipe.

--Not really a big deal, but interesting to see they either added this to the ECUs or no one has ever mentioned it before that I have seen.

2) The second interesting discovery is accel fuel enrichment. No matter what I do with F or L tables, when you move the throttle rapidly, causing a spike in MAP the ECU compensates by dumping some extra fuel. It puts the AFRs in the 10.8-11.0 to 1 area for a split second when doing a 30% or more rapid TPS change. With fast but only slight openings, it will dip into the 12.5:1 area then go back to fueling normally. It is proportional to the amount the throttle changes, very small but rapid changes induce smaller, but repeatable rich conditions.

--I am actually pretty impressed they managed to work this into the ECU. I don't really like "how" much fuel it adds with big changes, seems a bit excessive to me, but at least there is an accel enrichment function. Also thought I would mention this as I have never seen anyone document it before.

GL/HF tuning, don't blow stuff up

in the map info it says some 13&14 bikes only, any thoughts on applying it to a 07 classic I might need to consider?

You would have to copy all the tables over to the older base tune. It works but the older exhaust vs new flow a bit differently.

My Hybrid tune should work fine on an older bike if transfered to the older base tune.

My smooth tune I would not move like that to the older tune, it is already 15.2:1 cruise AFR and 13.6:1 at wot. On a 04-09 non tourer it might be too lean to be safe if used.

IMHO cruise afr at 15.2 is way to lean. Your right leg should be really hot. And wot at 13.6 does not seam to be the best choice for full power. Try cruise at 14.2 and wot at 12.5 to 12.8. Remember stoichiometric afr is at different numbers depending on the gas. 10% ethanol gas use 14.2 and for 100% gas use 14.7.

I have my Dobeck AFR Plus set for 14.2 and 12.8. Right leg is always cool. I get 40 plus mpg routinely. I dyno'd it and found these numbers to provide the best power readings. My HP is 140 and TQ is 155. Stock intake and 2 TOR and 1 Stock muffler. Sounds great.

Interesting you would mention that. I was running the stock tune the other day to get some data, just to see what triumph thought was OK. Try 15.5+ on cruise and light load and low 14s under wot. Needless to say that didn't stay in my bike long.

As far as lean cruise goes 15 is well below what most modern engines will tolerate. The crazy rich accel pump in the 20773 tune ensures you never go from lean cruise to high load and have a lean spike, it reacts in less than a tenth of a second to big throttle inputs.

I ran my turbo conversion car at 18:1 on a trip from Georgia to Arizona in lean cruise conditions and saw 53mpg with no drivability issues cruising at 80mph. Most of the standalone guys I know run around 16-16.5 in lean cruise, just takes less timing since mixture is leaner and exhaust temps will stay easily tolerable.

Just goes to tuning preference, its pretty well documented that mid 12s vs mid 13s if ignition timing is adjusted to compensate will make nearly the same power. Efi101 has some pretty good material if you troll through their forums.

In the end the R3 motor is so vastly under stressed in stock form I suspect there is a pretty wide AFR and ignition timing window that will produce powerlevels within a couple of percent of each other.

Wanted to add, my Hybrid tune is closer to your AFRs, which was the first one I built.

Smooth tune is a bit leaner across the board with a little less timing to compensate.

Exactly why I built two, so I can test them both on the dyno

New "toy" got here today. Some really great nuggets of info in this, WELL worth reading through chapter 13, if all I got was chapter 13 for the price of the whole book it would still be a pretty good value.

Please keep testing. Let us know what improvements you can make. I want more power TQ & HP.