[Healeys] carb oil

Michael Salter msalter at precisionsportscar.com
Wed Aug 11 20:20:37 MDT 2010


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 at 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 at 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
> _______________________________________________
> Healeys at autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation  $12.75
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage:
http://autox.team.net/mailman/options/healeys/msalter@precisionsportscar.com


More information about the Healeys mailing list