Does the oxegen sensors on Harleys new engine enhance or hinder performance?
May 31, 2010 by chec
Filed under Engine sensors
Does the oxegen sensors on the new Harley engines hinder or enhance performance?
May 31, 2010 by chec
Filed under Engine sensors
Does the oxegen sensors on the new Harley engines hinder or enhance performance?
The sensor is required for the EFI to function. You can buy a power commander to modify your EFI programming to increase performace.
Hinders a bit
does no restrictions what so ever, its there for other reasons, computer related proper engine performance, it just a sniffer to help the motor smell UN burned fuel particles PPM parts per million and tells the computer to make air fuel ratio adjustments so you get optima performance and keep the are Clean at the same time ,
Limitations only occur when you attempt to modify your bike.Left stock it functions well. If you’re planning on doing “mods” plan on a aftermarket controll module too.
A Harley mechanic told me it hinders slightly
I just read up on this subject while trying to figure out how the EFI works on my new-to-me BMW.
I guess the short answer is neither.
Removing it without changing anything else will probably give you worse performance at smaller throttle openings, although it might just as likely improve performance at the expense of fuel economy (and catalytic converter lifespan). What the oxygen sensor is for, really, is to monitor the quality of the exhaust to make sure it can be processed by the catalytic converter. Fortunately, what’s good for the converter is generally good for combustion as well. The oxygen sensor is generally read by the EFI computer at smaller throttle openings (0-1/3) and ignored for bigger handfuls (1/3-wfo). As you might imagine, for an engine with two big cylinders, a mass air flow sensor (as used in car fuel injection) is pretty much useless at low RPMs/small throttle openings, as the air moves in huge pulses instead of a nice smooth flow. At higher RPM and bigger openings the flow smooths out and the computer can rely on mathematics to figure out how much air is coming in, and rely on an internal map to determine how much fuel to inject. At lower RPMs/openings it uses the oxygen sensor to tell whether all the fuel it injected the last few times got burned or not. It tries to lean out the mix until it starts to see some left over oxygen at the sensor, then richens it again. It will rock back and forth over the “perfect stoichiometry” point. You may hear a half-miss once in a while at a lean point in time. This is called “closed-loop mode”. The EFI should try to work with a bad or disconnected O2 sensor, but it will most likely run a bit rich.