...das nachfolgende Posting stammt von Hr. DNA himself und erklärt auf sehr profunde Art und Weise, was ich schon weiter oben anklingen hab lassen, dass nämlich die ECU einen höheren Luftdurchlass durch den Sprotfilter nicht automatisch ausgleichen kann, oder zumindest nicht direkt.
Dieses Posting sollte die Bedenken eines Forenmitglieds, bezüglich einer motorschädigenden Gemischabmagerung bei Verwendung des DNA-Filters an einer sonst im Originalzustand belassenen Shiver, zerstreuen.
lg c.
The actual airflow of the filter is 18,4% more than the stock paper filter.
Both filters are tested back to back out of the air box on a rig and the flow is automatically corrected by the computer @ 25 degrees C.
So the stock Shiver paper filter (NEW) has a flow of 135,7 cfm (cubic feet per minute) and the DNA filter 160,6 cfm tested at 1,5 inches of water pressure.
Without any air box mods it is impossible to pass 18% more air into your engine, so don’t worry.
The stock Shiver ECU cannot compensate airflow (currently no other bike can) only air pressure difference, using the 2 MAP sensors located in the air box. So it will adjust the fueling if the pressure in the air box changes because of the elevation or the difference in vacuum (less vacuum) that will occur because you are using a less restrictive air filter.
Of course these fuel changes are small and not more than 3-5% and apply only over 3800 rpm. The area from 0 to 3800 rpm is controlled by the Lambda sensor in a closed loop.
Running a air/fuel ratio test in the past, with the carbureted bikes was very critical, now days with all the fuel injected bikes and the properly designed air boxes it isn’t such an issue and we haven’t seen dramatically lean situations that will harm the engine.
In case it is 100% necessary to adjust the fueling DNA always includes a tech sheet with the filter, not and issue for the Shiver, Dorsoduro.
DNA Filters R&D