dyno tune w sert and elevation question
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Road Master
Joined: Dec 2007
Posts: 1,064
Likes: 4
From: Sierra Vista, Arizona
dyno tune w sert and elevation question
I live in southeast Arizona and elevation is 4632 feet. My son lives in Colorado and elevation is 5546 feet. He has a harley mechanic that does dyno's a lot cheaper than I can get it done here. Will the difference between elevations (914 feet) screw me up or is it okay to go ahead and do it there?
Stellar HDF Member
Joined: Nov 2004
Posts: 3,156
Likes: 41
From: So Cal
RE: dyno tune w sert and elevation question
I dont think a thousand feet will make any noticeable difference.
My dealer that did my dyno tuneis at sea level in the Marina and I live in the SB mountians about 60 miles away and at anelevation of 3500 ft. My bike runs great riding at the beach or at home in the mountains. I commute to work from home (3500 ft) to almost sea level a couple of times a week.
My dealer that did my dyno tuneis at sea level in the Marina and I live in the SB mountians about 60 miles away and at anelevation of 3500 ft. My bike runs great riding at the beach or at home in the mountains. I commute to work from home (3500 ft) to almost sea level a couple of times a week.
RE: dyno tune w sert and elevation question
Someone will correct me if im wrong but only carb engines get affected by altitude, fuel injected are either close loop or open loop systems and they give and take for altitude....
Ultimate HDF Member
Joined: Oct 2007
Posts: 5,257
Likes: 6
From: Leander Texas
RE: dyno tune w sert and elevation question
The carb and the efi are effected because it is the air density that changes the afr. If the bike is in closed loop then no it is not effected because the thinner air will make the bike rich and the closed loop will compensate.
RE: dyno tune w sert and elevation question
it doesn't really matter, your not going to a much different altitude. i took a trip with the wife a few years ago...we traveled all through colorado...up through independance pass and through the valleys. we finished the trip in vegas...i was as high as 12000 feet and as low as sea level. the efi adjusted for each leg of the trip, it was seemless, until we hit the traffic in vegas. 103 SE engine and 5 MPH, in 120 degrees, she started to sputter, but i dont think altitude had anything to do with it.lol..
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Extreme HDF Member
Joined: Nov 2006
Posts: 13,702
Likes: 38
From: Houston area
RE: dyno tune w sert and elevation question
The injection does make a bit of a difference in how it runs at various altitudes. HOWEVER, relax because most folks don't realize it but density altitude at a given altitude varies with temperature, barometric pressure and humidity. For instance: if you live/ride at 1000' the density altitude can easily vary 2000' either wayon a daily basis and I would venture to say even your carbed bike generally never lets you know...
I took the cog railway up Pike's peak (about 14,000') and talked with several ridersat the top on all sorts of bikes and none had a bad running engine, just down on power due to altitude. Frankly I was surprised. Carbed piston powered airplanes have a meansto adjust steady state mixture, even injected engines, which run smoothly enough have a means to adjust fuel flow for adjusting exhaust gas temperature to a point of best economy withoutgetting too hot.
Blah blah blah....I just realized I was trying to sound like I knew what I was talking about...get it dynoed and it will be fine
I took the cog railway up Pike's peak (about 14,000') and talked with several ridersat the top on all sorts of bikes and none had a bad running engine, just down on power due to altitude. Frankly I was surprised. Carbed piston powered airplanes have a meansto adjust steady state mixture, even injected engines, which run smoothly enough have a means to adjust fuel flow for adjusting exhaust gas temperature to a point of best economy withoutgetting too hot.
Blah blah blah....I just realized I was trying to sound like I knew what I was talking about...get it dynoed and it will be fine
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