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FJR Motorcycle Forums
Technical & Mechanical Problems
Airbox Modification
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<blockquote data-quote="UselessPickles" data-source="post: 955850" data-attributes="member: 3256"><p>MPG is so dependent on local and personal factors that I won't try to answer beyond the general idea that you will obviously see a reduction in MPG if you have the fuel injection system modified in any way to provide more fuel in partial throttle cruising RPM ranges.</p><p></p><p>Try leaving the stock oxygen sensor plugged in when you reconnect the PCIII. You'll get the custom dyno-tuned benefits when you're accelerating and operating at high throttle positions and high RPMs, but still get decent cruising MPG due to the stock ECU's "closed-loop" mode that targets a 14.7:1 air:fuel ratio. This means that you might still experience some lean hesitation/surging in some situations that would otherwise be reduced/solved by the custom tune. Just gotta try it and see how it works for you.</p></blockquote><p></p>
[QUOTE="UselessPickles, post: 955850, member: 3256"] MPG is so dependent on local and personal factors that I won't try to answer beyond the general idea that you will obviously see a reduction in MPG if you have the fuel injection system modified in any way to provide more fuel in partial throttle cruising RPM ranges. Try leaving the stock oxygen sensor plugged in when you reconnect the PCIII. You'll get the custom dyno-tuned benefits when you're accelerating and operating at high throttle positions and high RPMs, but still get decent cruising MPG due to the stock ECU's "closed-loop" mode that targets a 14.7:1 air:fuel ratio. This means that you might still experience some lean hesitation/surging in some situations that would otherwise be reduced/solved by the custom tune. Just gotta try it and see how it works for you. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Airbox Modification
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