More air means leaner mixture. Don't care what others may opine.
The DP tune leaves a lot to be desired from a performance standpoint. It might enrich the mixture but when I put an AutoTune on mine which had the DP tune, the percentage AFR changes were very high.
Ride the bike and monitor your temps and pipe colors. Any changes from what it was previously would be cause for concern. Might also be informative to pull the plugs and inspect if the pipe colors change.
Evening !
I'm inclined to chip in here.
The correct answer depends on how the ecu calculates the required fuel.
Modern ecu's rely on 2 sensors to accurately measure the correct amount of fuel to inject.
- Map sensor ( absolute pressure/vacuum )
- Maf ( airflow sensor ).
If our 821's use a MAF, it will then measure the added air, and add fuel accordingly. The result is the exact same, so as long as the intact tube diameter housing the MAF doesn't change. ( you can change the filter or flow BEFORE the maf, but it's calibration is done according to the diameter of the intake tract ).
A MAP relies a volumetric efficiency table as multiplier ( and of course air temp ). ((-0.5bar @ xx*C) x injector pulse width)x compensations = Mapped fueling. If you change the volumetric efficiency of the engine, before or after the cylinder, your are in fact changing the amount of air ingested, and the ecu has no way of seeing this. You could run rich/lean. This is an issue.
MAF's are usually good at measuring airflow in closed loop situations/low flow of air( feedback from the O2 sensors finely correct the fueling, allowing a leaner burn without knock or pre-ignition ). This permits tighter fuel control, and also allows the ecu to target a stoich mix ( 14.7 AFR ).
A combination of both could be used, as a MAP is much more precise, and is not influence by debris, oils, water, etc. It is, much less precise at lower-flow situations.
I've grown to love speed density tuning. A combination of both is doable ( think a transition of MAF correction 0-100 %, where 100% is maf only, and 0% map only. Correlate that to throttle opening and you have yourself a nice smooth transition between riding smoothly and making power )
So, the big question ( I'm new to Ducati's, btw ! ) how are the M821's ( or Duc's in general ) fueled ? Maf ? Map ? Both ? I'm guessing MAP, and simply be deduction, because ducati's require upmaps/remaps when changing the exhausts...
( this is by all means a verrrryyyyyyyyyy short resumé of the fueling systems on modern ecu's, and we could go on for DAYS ).
Source :
Ecu tuned 100'S of cars myself.
Now I want an air filter ! Where did you order it ? I've got the cables to plug it to a laptop, and would love to pull the map and tinker with it. Maybe I could make a few maps and offer them to the community... !
