- Joined
- May 4, 2013
- Messages
- 199
- Location
- Texas
The bikes run in closed loop so they are not "rich" per say at those conditions.
Lean at low throttle positions due to being in closed loop since they are running at stoich and a little bit richer than stoich can smooth things out. Stoich would be 14.2 or so for pump gas (14.7 for ethanol free gasoline).
More likely, it is due to lazy, incomplete tuning for fueling and spark timing at these throttle positions. The 1199 is a race bike for the street so I can't imagine Ducati would invest tons of time at a low throttle, low RPM scenario. The bike runs great, although rich, at a race pace.
A lot of it depends on when the bike is programmed to use closed loop as well. Certain coolant temps, ambient (air temps), throttle positions, etc etc will force the bike into open loop.
Lean at low throttle positions due to being in closed loop since they are running at stoich and a little bit richer than stoich can smooth things out. Stoich would be 14.2 or so for pump gas (14.7 for ethanol free gasoline).
More likely, it is due to lazy, incomplete tuning for fueling and spark timing at these throttle positions. The 1199 is a race bike for the street so I can't imagine Ducati would invest tons of time at a low throttle, low RPM scenario. The bike runs great, although rich, at a race pace.
A lot of it depends on when the bike is programmed to use closed loop as well. Certain coolant temps, ambient (air temps), throttle positions, etc etc will force the bike into open loop.