The rate of flow over the bridge will be increased because of the
higher vacuum created by the restriction of the piston.
Higher flow rate produces a larger drop in pressure at the jet and the
fuel flow is increased..
All very simple really.... :)
Michael Salter
On Wed, Aug 11, 2010 at 8:32 PM, Richard Ewald <richard.ewald@gmail.com>
wrote:
> ::: Scratches head:::
> The mixture would be too rich if the piston rises too slowly?
> The higher the piston, the thinner the needle cross section at the top of
> the jet. The thinner the needle cross section the more fuel can be drawn
> out of the jet.
> So if too thick oil is used in the dash pots, the pistons will rise slower,
> This would leave a thicker cross section of needle at the top of the jet,
> and thus allow less fuel to be drawn into the engine.
> Seems to me that using too thick an oil would give a lean mixture on a snap
> throttle opening.
> What am I missing?
> Rick
>
>
>
> On Wed, Aug 11, 2010 at 3:44 PM, David Nock <healeydoc@sbcglobal.net>
wrote:
>
>> If you use a oil that you use is way to thick the piston will be slow
>> to rise and you will have a little to rich mixture when accelerating.
>>
>>
>> David Nock
>>
>
>
>> British Car Specialists
>> Stockton Ca 95205
>> 209-948-8767
>>
>> www.britishcarspecialists.com
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