OK, I admit this is more complicated than I thought...
I'm still a little dubious that a pressure differential of .0012psi could
make any discernable difference (difference of + or - 1/32nd inch fuel
depth, which is about the difference one washer thickness would make).
> Charley & Peggy Robinson wrote:
>
>> The atmospheric
>> pressure in the bowl pushes the fuel thru the jet into the lower
>> pressure environment in the venturi. Now, we know that as you go deeper
>> in a body of water, the pressure increases.
>
> ...at a rate of 0.465psi per foot. A twelve foot deep pool produces a
> pressure of 5.6psi or about 1.4 bar absolute. But I digress...
>
>> The same thing happens in
>> the microcosm of the float bowl, albeit the pressure change is very
>> small. That's why the float height affects the mixture. When you tweak
>> the needle adjusting nut, you compensate for that, among other things.
>>
>>
>> Cheers,
>>
>> CR
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.
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