Advice....please
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Road Captain
Joined: May 2015
Posts: 633
Likes: 42
From: Charlotte NC
Advice....please
I don't want this to go to the tuning section, as it doesn't necessarily reflect a tuning question. However, I run with a PowerVision and have changed slip ons since my original tune. But I have run several autotune sessions with huge success.
I live in South Carolina, and recently did a 4500 mile trip out west to Colorado. While there we were at an average of approximately 7500-8000 feet in elevation (topping 14k on Pikes Peak). The bike ran so much better there....low humidity, cooler temps, and I'm guessing lower oxygen. Prior I had some occasional popping sounds (here in SC), primarily a stubborn pop every time I blipped the throttle, yet while in Colorado I had absolutely none. The bike ran like butter! I mean perfect!
What can I do with my tune here at lower elevation to make it run so smooth? Can I adjust with the PV?
I live in South Carolina, and recently did a 4500 mile trip out west to Colorado. While there we were at an average of approximately 7500-8000 feet in elevation (topping 14k on Pikes Peak). The bike ran so much better there....low humidity, cooler temps, and I'm guessing lower oxygen. Prior I had some occasional popping sounds (here in SC), primarily a stubborn pop every time I blipped the throttle, yet while in Colorado I had absolutely none. The bike ran like butter! I mean perfect!
What can I do with my tune here at lower elevation to make it run so smooth? Can I adjust with the PV?
Road Master
Joined: Sep 2011
Posts: 1,033
Likes: 41
From: Mount Airy, North Carolina
Your tune may need to be tweaked more for SC driving. Obviously our air cooled motors love cooler lower humidity air to make the most power, but on the same token, at 8000 ft above sea level there is less oxygen. Less oxygen for given amount of fuel = richer. Richer = cooler better running motor.
When you changed your slip on's you effectively may have leaned out your existing tune. You may need to do more auto tuning sessions. Also, did you use auto tune basic or pro? This makes a difference in the tune as well.
When you changed your slip on's you effectively may have leaned out your existing tune. You may need to do more auto tuning sessions. Also, did you use auto tune basic or pro? This makes a difference in the tune as well.
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Road Captain
Joined: May 2015
Posts: 633
Likes: 42
From: Charlotte NC
Tight as honeymoon night
Thread Starter
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Road Captain
Joined: May 2015
Posts: 633
Likes: 42
From: Charlotte NC
Your tune may need to be tweaked more for SC driving. Obviously our air cooled motors love cooler lower humidity air to make the most power, but on the same token, at 8000 ft above sea level there is less oxygen. Less oxygen for given amount of fuel = richer. Richer = cooler better running motor.
When you changed your slip on's you effectively may have leaned out your existing tune. You may need to do more auto tuning sessions. Also, did you use auto tune basic or pro? This makes a difference in the tune as well.
When you changed your slip on's you effectively may have leaned out your existing tune. You may need to do more auto tuning sessions. Also, did you use auto tune basic or pro? This makes a difference in the tune as well.
Road Master
Joined: Sep 2011
Posts: 1,033
Likes: 41
From: Mount Airy, North Carolina
if you have X amount of fuel and you take away Y parts of O2, then you have created a richer mixture. However, we don't usually look at A/F ratios that way. But in a sense, when you go up in really high elevations, the air is less dense, so less O2 in a given volume of air. So if your bike was running slightly lean at sea level, going up in elevations may have been enough to richen up the fuel mixture and you felt that it ran better in the given conditions.
I live in NC at a higher elevation than you. my tune was done by fuel moto and then I did many Auto Tune runs to further dial it in. When I travel to Myrtle ralley I always feel my bike runs better at sea level than here at home.
I live in NC at a higher elevation than you. my tune was done by fuel moto and then I did many Auto Tune runs to further dial it in. When I travel to Myrtle ralley I always feel my bike runs better at sea level than here at home.
Road Master
Joined: Jul 2012
Posts: 876
Likes: 65
From: CT
My bike was running great with my PV and new cams, then I got it Dyno tuned by a local pro, it runs AWESOME now. Go for a dyno tune, money well spent
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Road Warrior
Joined: Mar 2009
Posts: 1,518
Likes: 59
From: Port Neches Texas
Last year on the way to Sturgis we stayed in Colorado Springs, I put in a set of Andrews 48 cams 3 weeks prior and brought it to the tuner, the bike was tuned without the breather and he told me to pick up a breather that also filtered in the front, my bike gets in the low - mid 30s here on the gulf coast up there I was in the upper 40s. It really likes it up there.
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Joined: Aug 2013
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From: Somewhere on the Bourbon trail
Originally Posted by smals78
I would think less O2 means leaner?
Originally Posted by liquidr1
if you have X amount of fuel and you take away Y parts of O2, then you have created a richer mixture.
That slight popping is most likely caused by a leaner mixture.
Ultimate HDF Member
Joined: Dec 2013
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Lean/rich usually refers to the fuel being mixed with the O2, so less fuel=lean as the O2 is constant for a given altitude. Your ECM makes minor adjustments based to the O2 at different altitudes, but usually not enough to compensate for the thinner air at very high up. So, in your case in Colorado, thinner air=more fuel.
That slight popping is most likely caused by a leaner mixture.
That slight popping is most likely caused by a leaner mixture.
They say the higher you go in elevation, the lower grade gas you really need due to lower oxygen levels...