> Obviously, a mixture readjustment is the answer. However, trying
> to do this
> on the side of the road or at a rest stop is not the easiest thing to do.
It's actually fairly easy, if you use the "lift the piston" method and have
the little pins (on SUs) working.
> Does anyone have a short-cut rule of thumb or a guess for compensating for
> each 1000 feet of altitude. For example "two flats leaner (on the SUs) for
> each 100 feet", etc.
>
> Anyone care to toss their 2 cents in on this issue, informed or otherwise!
I live near sea level. When I drove my TR3A with stock H6 carbs to
Breckenridge for VTR a few years ago, I didn't see any need to fiddle with
them until I got to 8,000 feet or so. If memory serves (and it rarely does
these days), I leaned them less than 2 flats. Of course, I was having some
other interesting engine problems, so this experience may not be typical.
But after fiddling with them several times near the peak (11,000 ft ?),
driving home with no adjustment, and then replacing my recessed valves; I'm
pretty sure I didn't go more than 2.5 flats.
Randall
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