While researching the flat spot issue in progression circuits I stumbled upon
a car forum where extra drilling was explained.
There were many who erroneously used the throttle stop to set idle speed just
like many do with S.U.s. The progression can't work right as the bypass
circuit messes with the mixture and the holes behind the plate start on too
early.
These guys went as far as cutting different bevels on the plate edge to change
how that first hole would react and some even drilling hole is the plate. All
of these mods were for street driving. as transition from idle to driving, and
mid range power can be tricky to tune for speeds where the carb is using
progression circuits until the main venturi kicks in
On Dec 19, 2013, at 2:08 AM, Chris Dimmock wrote:
> Hi Derek,
> Usual strategy is you run an idle one size larger. Usually.
> It's an experiment based on numerous, inter related variables.
> I have webers with 2 drillings (45DCOE 13)
> Depending on the exact model, You can end up with 2 - 5. Different
locations,
> different sizes.
> Oh. And for all those with SU's, contrary to popular opinion, you don't
need
> to adjust webers once they are set.....
> ;-)
> Best.
> Chris
> PS. Probably Less adjustment on Webers than SU's
> SU's are far more maintenance than Lucas Points...
>
>
>
>
> Sent from my iPhone
>
>> On 19 Dec 2013, at 8:01 pm, Derek Job <derek.c.job@gmail.com> wrote:
>>
>> Interesting comment about masking the flat spot with fuel.
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