No power at 10,500 feet

[skids]

I took the ratbyke (81 dresser with 80 engine and 750 FD) up clear creek canyon and on up to St Mary's Glacier. The engine had a tough time at 10,500 feet elevation. It was only trouble just off idle. It did that before when I went to the top of Loveland pass whick is also right at timberline. 39 mpg, and half of that was the superslab doing 65 mph.

[Geezer]

There air is much thinner at that altitude so it will run very rich.

There's no easy solution.

Geezer

[XSPastor]

I wonder if you could drill and plug your air box. Then for different elevations you could just remove a certain number of the plugs depending on the altitude to give the engine more air! Would that work? This only seems worth it if you're at a higher elevation for a decent amount of time. Maybe someone could even rig a variable air intake with settings for certain altitudes that could be dialed in while riding??

[motoman]

Hey there Sid, wife and I rode my Venturer to Durango last weekend(as most of you know, crashed the ST). The CV carbs copensate fairly well with the vacuum loss at 10,000 plus elevation. Having stock jetting and a few milimeters lower than stock on the floats seemed to work alright, but lugging it down like we all somtimes do at lower elevations it will load up a bit if I continue lugging it around those switckbacks. It's kinda of a nuisance, so I just drop down a gear or whatever it takes to keep it at a rpm so as to eliminate the problem. least that way when you have to back off a bit, needles drop and help keep it leaned a bit. As you know, most of the fun scenic riding(and cooler) is always up. Those cases, I just keep it singing between 3-4grand. Least I know downhill will be coming soon. Otherwise, here at 5,000ft. a roll on from 1200rpm in 5th, never get so much as a sputter. Come over the hill sometime for a ride, my Venturer seems to be more visible and stays on it's wheels.