Thumbs Up for Power Commander V and Autotune

[chync_imp]

I got mine at JakeWilson.com and it was a little cheaper. $319.99 + $228.99.

Honestly I didn't do much comparison shopping for this. I wasn't concerned with removing the speed limiter. I ride a lot of twisty mountain roads and am usually in 2nd and 3rd gear. But you are correct that the Power Commander doesn't eliminate the speed limiter.

The Power Commander ships with a target afr that is recommended as a good starting point for a sport bike.

I am still researching engine tuning but this is what I did to run a couple of different scenarios to get an idea of how the changes would feel while riding...

I downloaded one of the two maps specifically for the CB1100 from the Dynojet website. I think I used the one for the stock muffler and stock air filter to start with.

I loaded that map as my starting point and then used the target afr that shipped with the device.

I enabled auto-tune and went for a ride. I checked the trim tables to make sure the auto-tune ran and it did. I went ahead and accepted those, applied them to my map, and then I saved this new map as my new baseline.

When I looked at the default target afr table I noticed that the values weren't all the same across all cells. There was some variation in some specific rpm and throttle ranges. So in my subsequent testing I simply added or subtracted the same amount across all of the cell ranges leaving the relative differences in place. Basically I just took the target afr and either made it more lean or more rich and then I would take a ride to see how it ran.

I found some good references online explaining tuning basics and some guidelines on target afr.

I thought this video was useful: https://www.youtube.com/watch?v=EY78uPXvvY0

I also found some interesting discussion on this forum: http://www.600rr.net/vb/18-exhaust-fuel-...hread.html

I think to really identify target afr across the entire range you would need some feedback from a dyno. The auto-tune does make it possible to get some decent results without a dyno but if you really want to take it further than just making some safe targets based on general principles a dyno would be the way to go.

I go through some significant elevation changes where I ride and the auto-tune will help with that.

I am now thinking of installing a switch so I can choose between a more fuel efficient map and a sport riding map. There is a connection for that on the Power Commander.