Dave Stoll asked:
>Does the altitude affect SU carbs? ... I bought my roadster from someone
>in Colorado, had it shipped to Maine at approx. 100ft above sea level and
>have never had to touch the carbs in 45,000 miles of driving. My thinking
>is that the vacuum operated pistons in the SUs would also be self regulating
>to the air density.
Well, it's possible it'd run better back in Colorado, so maybe you should
bring it back home!
Keith0alan@aol.com replied:
>Altitude affects SU carbs much less than regular carbs. At Shasta when we
>make the run up the mountain the SU cars just tick right along and the Solex
>cars are running real rough by the time we get to the top. You can really tell
>at idle. The SU cars do still run out of HP because of the lack of air but the
>mixture control is better.
Hey Keith, you didn't have to tell him! :)
I think you're right though Dave, they literally self-regulating.
What Keith sez is very true -- I've had mine down to 4,000' up to 10,500',
and it ran so smooth the whole time I couldn't believe it. At 10,500', all
I know is I didn't have to downshift on a 7% grade and I was blastin' past
everyone else.
|