Altitude Limit?
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Tourer
Joined: Sep 2009
Posts: 401
Likes: 11
From: Escondido, CA
Altitude Limit?
I'll be biking in the Colorado mountains late August and early September and wondering if there would be a problem with altitudes up to 12, 183 ft., which is the highest pass on(from Wikipedia), "Trail Ridge Road...the name for a stretch of U.S. Highway 34 and is the highest continuous paved road in the http://en.wikipedia.org/wiki/United_States."
I know EFI on a Harley is supposed to adjust for altitude but I wonder if there is a limit.....surely there is, I just hope it isn't somewhere South of the above number.
I'd sure be embarrassed if my bike chokes and the Honda people I'll be with pass me by..... laughing their fat butts off at my expense.
Thanks,
VR
I know EFI on a Harley is supposed to adjust for altitude but I wonder if there is a limit.....surely there is, I just hope it isn't somewhere South of the above number.
I'd sure be embarrassed if my bike chokes and the Honda people I'll be with pass me by..... laughing their fat butts off at my expense.
Thanks,
VR
Last edited by HOGNOT; Jul 16, 2013 at 04:14 PM.
Thread Starter
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Tourer
Joined: Sep 2009
Posts: 401
Likes: 11
From: Escondido, CA
Thanks!
Thread Starter
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Tourer
Joined: Sep 2009
Posts: 401
Likes: 11
From: Escondido, CA
Thanks,
VR
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Joined: Oct 2006
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From: Nevada
Actually Colorado would be a good place to try lower grade. Not saying you should do it but your octane requirements would be lower.
Grand HDF Member
Joined: Jan 2012
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From: Oklahoma
It has been covered in another thread, but you seem to have your understanding for octane backwards. The more air that goes into the engine, the higher is the needed octane. At 10,000 feet, only about 2/3 of the air available at sea level is available so the compression pressure and resulting heat from compression is less. You can get by with lower octane.
When at sea level, you can actually get "extra air" when under a high pressure system with the barometer above 29.92. It would be like very mild supercharging and would increase compression pressure and heat needing even higher octane to prevent detonation.
When at sea level, you can actually get "extra air" when under a high pressure system with the barometer above 29.92. It would be like very mild supercharging and would increase compression pressure and heat needing even higher octane to prevent detonation.