The particulars: 09 ultra, SE Fatshotz pipes, SE stage 1 AC.

Now the questions

If I am understanding things correctly, the 14.6 AFR in a cell, tells the bike to run in a closed loop mode for that cell.

The O2 sensors (stockers), can only detect 02 levels above or below 14.6. and will adjust fuel to meet the 14.6 afr.

After running smart tune a few times, a majority of my AFR cells are 14.6.

Why not change the 14.6's to 14.2 for a performance increase and cooler engine?

What do the 02 sensors do when you are in a open loop range?

Thanks.

 

They are 14.6 - what the closed loop bias is set to.
You can keep the O2 sensors adjusting the fuel and cool the bike down by adjusting you bias settings higher which bring the AFR down.
Set them to around 720-780

 

The Smart Tune Is not going to change your AFR. What it will do is synch your VE tables. ie your ve tables will have more accurate information concerning the efficiency of your engine moing fuel/air in and out based on it's actual performance.

I think if your ve tables are accurate, you could change the AFR out of closed loop and acheive the desired AFR. But I am not certain about this. So even though you are out of closed, the ECM has the infomation in the VE tables to base the calculations on that derive the desired AFR. As I said I'm not certain about this but I plan to do some experimenting.

 

How do these look?

 

I can't really say they look good or bad. They are specific to our bike. I'll post mine. I am still doing smart tunes.

 

Thanks!! now your's look more like I'd expect. I'm somewhat confused by mine, as none of the VE cells are over 100%.

What mods are you running?

I realize I am not running with performance orientated mods, but I would've expected some bigger VE numbers than what I got.

I'd luv to hear the results of your experimenting.

thanks guys!

Scotty - i will be fiddling with the bias table this weekend (if the rains stop), thanks for your suggestion!

 

er, after hitting post, and thinking about it for another minute.....i wonder if its the base that i started with. i started with the stage 1 base (i will have to lookup the config id), and if the pipes for the base were more efficient than mine, that would be one reason my #'s are under 100?

 

J.E.T AirStack and Rush Slipons w/2" baffles. Love the breather, not so much the mufflers. Saving my pennies for a Black Ceramic Fat Cat.

Just made a data run the other night and adjusted my VE tables using those results and the results of a previous run. Probably going to do several more before I mess w/the AFRs.

When you do the Smart Tune runs, make sure that you upload your working map first, check the boxes that it's for a Smart Tune, and reset adaptive fuel.

More data runs and Smart Tuning first but I'll keep you posted.

I'd be interested in knowing your results. I've messed w/the CLB before, but I think I read that that change is so small it might not be worth it.