Quote:
Originally Posted by Franky4412
is it normal??? new 2-2 Termi slip-on with ECU and air box cover installed
got a 20-25 % increase in fuel consumption??
light is on at like.... 87 miles....
i guess it runs much more richer in fuel....well i didn't think it would run with a 20% increase
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Unfortunately, that is the drawback of the DP race ECUs... poor fuel mileage.
At part throttle, the stock ECU closed-loop operation is very lean and stingy
with fuel-- to a fault, really. The DP ECU dispenses with the closed-loop mode
of operation entirely (no longer uses feedback from an oxygen sensor in the
exhaust to correct air/fuel ratio). This helps the bike run cooler, reduces
surging and popping due to lean conditions, and also can help fix the tendency
to stall while approaching a stop or idling when the engine is hot. All good
things, but it comes at the expense of wasting some fuel out the tailpipe
and/or running overly rich at some RPMs and throttle openings.
You may be able to get back some of the lost mileage by using an add-on
device such as the Power Commander, and having the bike dyno-tuned to
produce a fuel map specifically for your bike (rather than some generic
fuel map pre-loaded in the ECU).