The Weber DFAV/DFEV is a progressive carb:  one circuit for idle, one for mid-range, one for full
throttle.  I have been able to achieve a rock solid idle, smooth transition to mid-range and then
on to full throttle, with the plugs looking a nice tan colour.  That's MY experience over 7 years
from the cold of Canada, to the heat of the Egyptian desert; from sea level to the rockies.  I
have experienced carb icing (damp conditions at 2 Degrees C), but that was before I had the
coolant plumbed into the proper air intake manifold.  No problems since then.

I'm not denying your experience, but I have not had your problems with my van.  M

--- Sudhir Desai <sudhir.desai@GMAIL.COM> wrote:

> I ran carbs on my 3.4liter chevy conversion. I would never ever want
> to subject other people to the problems of which I ran afoul.
> One of the fun problems was a very rich condition at idle which
> created a perfect mixture at WOT. If I rejetted the carb for proper
> running at low throttle/ low speed, I would go into fuel starvation at
> high rpms (not a good thing).
> Another problem was that I had to change up the rods and jets to pass
> emissions. I was lucky that I purchased an Edelbrock carb with their
> easy change fittings.
> ~I don't mean to totally da byen on anyone, but I really do not feel
> that carburation belongs on a modern automobile.
> For the same price, you could build a Megasquirt. :)
>
> Sudhir

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