Hi, Don,
Webers only have an idle and volume (mixture) screw-settings to do with
tickover. The rest of the fuel delivery-idle circuit, mid range, full
throttle-is dictated by the various jets (air and fuel) and in some
instances, the choke diameter.
Webers aren't hard to tune as such but it gets expensive if you don't have a
full range of jets, etc to hand. Also, you have to figure out which to
change fro a particular problem.
SUs, OTOH depend almost entirely on...
(a) being in good condition
(b) having the right needle
(c) being properly fitted and given some damping oil
With these requirements met, even twins are easier to tweak than a single
Weber.
In my experience, neither carb arrangement 'goes off' - it's usually a
combination of factors that cause poor running.
Cheers,
Dave H.
> All,
> Excuse my ignorance on webers, Why are they so hard to tune and are the
SU's
> harder or easier to get tuned right? I curretly have a weber on my 72 GT
but
> have recently pruchased a commplete SU setup to switch back. Please
explain
> which is the easiest to setup & why.]
>
> Thanks
> Don Markham
>
>
> > Take it to the pro. You only have to do it once, so it's not worth
buying
> > the Colortune and struggling with set-up, IMHO...
>
>
>
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