| Author | Message | ||
     Rotorhead |
Any one smarter than me figure out how to get some sea level power back into their ULY. Moving from 300' to 5000' has made all my power wheelies go away and I'd really like to have them back. The only thing I have seen in the tuning guide is reference to the Air density correction but nothing on how to change it. I figure changing one thing that controls the air part of the mixture instead of changing every fuel value across the fuel map. Anyone have any ideas or a solution would be great. | ||
| Safri |
I also live at @ 5000 ft. Due to the high altitude (lower ambient air pressure) you get less oxygen in the motor thereby the loss of power (14 to 20 %). Any mods to the fuel mixture will be fruitless. Only solution is to fit a turbo  . (Message edited by safri on October 01, 2008) | ||
| Natexlh1000 |
I noticed the same drop of power on my X1 when I got to Albuquerque. At least it didn't foul its plugs. but yeah, turbos kick ass! http://en.wikipedia.org/wiki/Kawasaki_GPZ750_Turbo | ||
| Jammin_joules |
14.7:1 air to fuel ratio is how normally compressed gasoline internal combustion engines work. Take away oxygen, you have to take away fuel, it won't burn. Take away those, you loose power. This is precisely the challenge of Pikes Peak International Hill Climb Race, starting at 9,200 feet and climbing to 14,111 feet in 12.4 miles. Back in the day of carbs only racers would tune so that they choked at the start, and pushed it in as they climbed. | ||
| Red_chili |
'Nuther high altitude Uly guy here. Yep, 20% less oxygen means you gotta work harder at wheelies. As long as you are normally aspirated. |
