By raising the piston to fast you will have a lean mixture. Yes you
will be getting more fuel but you are also increasing the size of the
venturi which for a short time will lower the low pressure area over
the jet. This will inturn cause less fuel to be pulled from the float
bowl. By holding the piston down and accelerating, you are increasing
the air flow over a smaller area. This inturn increases the low
pressure area over the jet and pulls more fuel.
David Nock
British Car Specialists
Stockton Ca 95205
209-948-8767
www.britishcarspecialists.com
.
.
On Aug 12, 2010, at 12:01 AM, Oudesluys wrote:
> With SU's to increase acceleration we used to use the thinnest oil
> possible to get the piston up fast and allowing more fuel in.
> Kees Oudesluijs
> NL
>
>
> Richard Ewald wrote:
>> Yes but does that higher flow rate more than offset the increased
>> thickness
>> of the needle due to the piston not rising?
>> Venturi vacuum is very weak, and I can't see where even if the
>> venturi
>> vacuum doubled it would overcome the lack of jet area.
>>
>> On Wed, Aug 11, 2010 at 7:20 PM, Michael Salter <
>> msalter@precisionsportscar.com> wrote:
>
> [demime 1.01d removed an attachment of type text/x-vcard which had
> a name of coudesluijs.vcf]
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