Purrfect! :)
Cap'n. Bob '60 :{)
-----Original Message-----
From: Bill L
Sent: Monday, February 23, 2009 5:05 PM
To: Kirk Hargreaves
Cc: spridgets@autox.team.net
Subject: Re: [Spridgets] SU Question - Accelerator Pump Question
Hello Kirk,
It has to do with the rate of rise of the piston. ...
the carbs operate atmospherically. when you press on the pedal, you're
opening the butterfly valve. This allows the engine to SUCK more. ..the
There is an air channel that is arranged so that when this suck is
increased, the piston to which the needle is attached rises, allowing both
more air, (from the air cleaner) and more gas (because you've pulled the
needle out of the jets) to flow. You can't flood the carbs because they
only deliver as much air/fuel as the engine will suck...
no to the point. the oil in the damper limits the RATE of rise of the
piston. This limits the amount of air that can flow sucking relatively more
gas from the jet, causing an increase in the richness of the mixture during
acceleration. When the engine again achieves relative equilibrium the
distance of the piston out of the jet (and thus the amount of gas flowing)
and the flow of air are stoichiometrically in balance. (theoretically)
if this isn't true someone will, i'm sure, correct me. .. PLEASE!
--
Best regards,
Bill L. mailto:pythias@pacifier.com
'66 Sprite MKIII HAN8L49403 "the red thing"
Taken as a whole, the universe is absurd
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