I also have a question. If I just change out the stock AC, with a Big Sucker, on my 010 CVO Ultra do I have to remap the engine or add a turner to keep it from damaging the engine or running to lean?
OK, here's the theory. On the bikes with closed loop operation (O
2 sensors), the sensors provide feedback to the ECM which then adjusts the time the injectors are open to maintain the air-fuel ratio specified in the calibration (map). While this is going on, the ECM also stores information about how much correction it has to apply to maintain that AFR and applies that information going forward. The real purpose of this system is to be able to correct for variations or wear in various parts over time. It can only make corrections up to a fairly limited point, however. It's not designed to compensate for major changes in air or fuel flow, like what would occur with cam changes, head work, bigger intakes, etc.
If you change out the pipes or air cleaner, and the engine runs OK and doesn't set any codes, that means your changes did not exceed what the system can automatically adjust for. So your engine won't be any leaner than it was before, and it won't destroy itself. However, since the stock setup is very lean you won't see much improvement for all the money you just spent on those pipes and air cleaner, and your engine will continue to run hot just like when it was stock. My suggestion: don't waste your money opening up the intake or exhaust if you don't plan to spend a few more bucks to tune the bike. If you want it to run like stock, leave it stock. If you want it to run smoother, cooler, and all around just better, even with no modifications, get it tuned by a competent tuner.
JMHO - Jerry
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Topic: Need Help with Air Cleaner (2010 SECU) (Read 9801 times)