[Spridgets] Rejetting carbs for high altitude

[JLC]

Paul,

I already adjusted the idle mixture screws, and I fitted spark plugs one
step warmer, but a change in main jets might be necessary - I am running
twin Webers 40 DCOEs, not SUs.

I have not been out in the Lotus for over a week, and as the weather
prediction is for more snow (we just had a couple of storms) over the next 4
days, I will not be out for at least another week... when I do take the car
out, I will fill the gas tank with regular gas, and see how much difference
it makes. The engine was already running too rich after the last dyno
session in San Diego, but now it is even worse due to the altitude.

JLC in the Black Forest at 7400 feet, near Colorado Springs
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Paul A wrote: 
When I lived in Colorado Springs, my 1098 van simply ran as at sea level as
far as major carb jet adjustment was concerned.  It did need a minor
adjustment as far as the idle speed went.  Can't remember what it was I did
with it.

The change in altitude height certainly did take away from the "Peppiness"
of the engine, compared to San Diego, but any adjustment was really tiny as
far as idle and running was concerned.  Check the oil level in the carb on a
frequent basis, though, as that can make a real difference in driveability.