PV Auto-tune or not

[Jim Bronson]

I recently purchased a new PV license and tune from FM for my 2024 Heritage. It currently has V&H slipon mufflers and K&N high-flow air filter. The bike runs very well, and I could be perfectly happy just letting it alone. However, I'm wondering whether there would be any seat-of-the pants improvement by running an auto-tune session. For some reason, I just can't seem to keep my hands off it if there's any chance to easily gain some performance. Expert advice is welcome.

[rigidthumper]

Save a copy of the current tune as a base map backup, unmodified. That way you have a fallback if ever needed.

[Hilly13]

Done meticulously there will be improvement, how much and where is the unknown, I'd do it 😁

[Jim Bronson]

Results of first Auto Tune. I'm not familiar enough with the results to know whether I should run an Auto Tune on the resulting tune. I haven't tried riding with it yet.You cannot view this attachment.

[mayor]

That screen shot is just showing you the number of hits that your recorded in each cell.  The more important info is the degree of change as noted in learned VE cells info. If you show that the data you collected is still double digits % of change, then you want to run again on the new tune.  I can't remember what is recommended, but I think +/- 5% change is a good goal in your typical riding range cells. 

One critique on the data collection that you did based on what you posted, you appear to be riding and collecting data based on normal riding.  The best way to collect autotune data on the street is to ride outside of your normal riding style. You want to hit the adjacent cells to where you normally ride.  This will provide you with a more accurate street tune.

Your bike tune appears to be TPS based (throttle position). The key is to use different throttle positions in each rpm range to better dial in the tune.   If you have the ability to see the PV while tuning, then hitting more cells is easy by using your transmission.  This is done by riding in higher and lower gears than you normally would for that scenario. When I street tune based on autotunes, I tend to ride each gear from as low of RPM as I can keep the bike running to around 4,500rpm.  I will often short shift to put more load on in the lower rpm's (enabling more throttle positions).  Hope this helps.

[Jim Bronson]

This helps a lot; many thanks!
Can I display the % change after the auto-tune session is done and the PV is removed from the bike? It isn't hard to reinstall it, so I can run another session with more aggressive riding, hitting 4500+ from time to time. I'll use the first session as the base for the second one.

[mayor]

Can I display the % change after the auto-tune session is done and the PV is removed from the bike?

The degree of change is visible on the PV when you finish the autotune session.  I looked for a picture of where to look, but sorry I don't have any examples in my pictures. 

You can compare calibrations in the PV software on your computer, but I don't think you will be able to measure the difference in %. You can use this function, but just remember the numbers you are seeing are in VE units not percentage.     

It's not really about driving aggressive, it's driving different. Try running in a different gear, higher and lower, than you normally would.  The higher the gear, the greater the load (more throttle position).  The lower the gear, the lighter the load (less throttle position).  If you feel silly while riding, you are likely doing it right.   

[Jim Bronson]

It looks like the PV mode screens I want to see are the "LCORF" and "LCORR" to get an idea of what percent is being added or subtracted with each new auto tune. I'll record these before I shut off the bike.

Sorry, 'aggressive' was the wrong word. I get what you're saying.

Thanks.

[Jim Bronson]

Performed the second Auto-tune session today. I captured the 'hits', 'LCORR', AND 'LCORF' screens. I managed to hit 5K a couple of times and 4500 several times. I'm not sure how to interpret the results, but I'm working on it.

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