This page is to set the parameters within which the “StayTuned” function operates from your O2 sensor.
PLEASE NOTE: Normally you would use StayTuned with a (retrofitted) wideband O2 sensor. It might be possible to make use of the built-in narrowband sensor too (gen2+3). This is something I’m investigating and will update here once I know more.
StayTuned takes the information from your O2 sensor and then tries to adjust the fuelling on the fly to match the AFR targets specified in the AFR table for any given RPM/TPS%. It is roughly equivalent to “Autotune” by Dynojet (powercommander) but it works a little differently.
StayTuned can be either:
ON (write to fuel map).
If StayTuned is on (write to map) then it will try to adjust the fuelling to match the AFR targets and will make changes to the fuel map. You can then write/flash those changes to save them or they will be discarded when the ignition key is turned off.
When StayTuned is active and writing to map then the “Pro adjustment” page changes to show the changes being made by StayTuned. In the screenshot below you can see on the “Pro adjustment” page new entries from StayTuned appear as red and green cells, depending on whether fuel has been added or removed. These numbers get adjusted as you ride and whilst they shouldn’t be trusted blindly, can give you a pretty good idea of where you need to be fuelling-wise.
ON (no write to fuel map)
If StayTuned is on (no write to map) it will try to adjust the fuelling to match the AFR targets but will *not* make changes to the underlying fuel map. This would be useful in a situation like if running a turbo where the boost level changes are not necessarily consistent with RPM/TPS so a fixed map isn’t actually practical.
In that case you’d have a likely have a basic map which satisfies the bike’s requirements under moderate boost with then “no write” changes being applied on the fly. It wouldn’t be as good as a MAP (manifold absolute pressure) based system (as exists on the Speeduino) but it should approximate it to some degree, and doesn’t require building a custom loom/adapter (as with Speeduino)
Summary:
Whether writing to the map or not, you can use the StayTuned settings (above) to limit which parts of the map you want to affect. e.g if your low mid was fine but you’re wondering if there’s more power to be had when flat out (bottom right corner of the map) you could limit StayTuned to only operate within the 6000-11000 RPM and 60-100% TPS range.
By default it won’t start operating before the engine has reached 70 degrees C, so it doesn’t interfere with (or get confused by) the warm-up-enrichment.
StayTuned operates whether you connect your phone or not, but only by hitting write/flash with your phone connected will the changes to the fuel map become permanent. Otherwise they would be discarded. So even if you were riding with StayTuned active but your phone disconnected, it would be building the map. If you want to save those changes you would need to connect with the app and visit the Pro Adjustment page, and hit flash, otherwise they’re gone when you turn the ignition off.
The idea is that you can test a theory against your baseline map and if the changes work out as you’d hoped then great, you flash and keep the changes, or if not you refine settings and test again.
This is different from on the Autotune where the table with the changes persist until applied, even with turning off the ignition in between.
PLEASE NOTE:
- StayTuned is not a *magical solution* and is only as good as the O2 sensor setup/calibration and settings. It can definitely help you build a map for your bike without a dyno (by riding) but you will likely need to make some manual adjustments too. It’s quite an advanced tool, but it will not magically create the perfect map for you.
- StayTuned only adjusts fuelling. It does NOT adjust ignition timing.
- I suspect the more accurately your O2 sensor is calibrated, the better your results will be using StayTuned
