power commander and altitude
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Road Captain
Joined: Feb 2012
Posts: 525
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From: Oklahoma
power commander and altitude
I was thinking to myself the other day that if the O2 sensors are disconnected when running a pcv can the ecm compensate for big changes in altitude. For instance the plains of Oklahoma to Denver. Any thoughts?
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
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From: Phoenix '53, '88, '09 Big Twins
the PCV would use the sensors in the intake to calculate air density and changes whether altitude or temperature.
and use the data in the "maps" to calculate fuel injector pulse width ( how much gas to allow)
the o2 sensors are used after combustion to determine if complete combustion has occurred so not directly related to the OP's question about altitude compensation.
I use another method which retains the o2 sensor data
normal day-riding for Arizona riders will see huge changes in elevation...1100' in Phoenix, 7000' at Flagstaff just a few hours ride away.
mike
and use the data in the "maps" to calculate fuel injector pulse width ( how much gas to allow)
the o2 sensors are used after combustion to determine if complete combustion has occurred so not directly related to the OP's question about altitude compensation.
I use another method which retains the o2 sensor data
normal day-riding for Arizona riders will see huge changes in elevation...1100' in Phoenix, 7000' at Flagstaff just a few hours ride away.
mike
Last edited by mkguitar; Oct 2, 2012 at 11:31 AM.
Stellar HDF Member
Joined: Sep 2009
Posts: 3,351
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From: Formerly Tampa Bay, FL, Currently Western PA
Yes, as mentioned there is a sensor that measures airflow in the intake, and should be able to compensate. However, if at all in doubt, e-mail powercommander. I've e-mailed them for recommended maps and they have been very helpful and knowledgeable, not just telling me WHAT I should use but also WHY.
Tourer
Joined: Apr 2007
Posts: 395
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From: Oklahoma
And, by the way,,,,,GO POKES!!!!!!!
Outstanding HDF Member
Joined: Apr 2012
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From: Chandler, Arizona
Air density in the intake charge is no guarantee that you aren't running lean. Only an 02 sensor can tell you that.
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Yes your ECM will continue to compensate for altitude with the PC-V and O2 eliminators installed. The Delphi ECM is a speed density system, it uses modeled airflow along with feedback from MAP and IAT sensors to accurately calculate air density and fuel delivery requirements.
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The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com
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Road Master
Joined: Sep 2010
Posts: 803
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From: Port St. Lucie FL
Yes your ECM will continue to compensate for altitude with the PC-V and O2 eliminators installed. The Delphi ECM is a speed density system, it uses modeled airflow along with feedback from MAP and IAT sensors to accurately calculate air density and fuel delivery requirements.
PS..am not hijacking, just re-stating the OP's question a different way
Ok, for those of us who are technically challenged....I have a PC-V from FM on a 2012 Ultra Classic with the O2 sensors disconnected from the ECM (no eliminators). I live in Florida and had a custom map done here...just about as sea level as you can get. If I ride up to the Smokies and get up to 5,000+ feet will I get any adjustment or will I still be working with the settings on the same static map at just above sea level?
PS..am not hijacking, just re-stating the OP's question a different way
PS..am not hijacking, just re-stating the OP's question a different way
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