spridgets
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Re: dashpot oil

To: David Ramsey <dwramsey@worldnet.att.net>
Subject: Re: dashpot oil
Date: Mon, 13 Mar 2000 09:40:17 -0800 (PST)
Cc: spridgets@autox.team.net
Um, ok...I mean other than that?  And installing the
piston upside down doesn't count.

--- David Ramsey <dwramsey@worldnet.att.net> wrote:
> Happens all the time, all you have to do is overfill
> them.
>             Crash
> 
> 
> >As far as I know, Richard's response is text book
> >correct.  I have never lost any damper oil, though
> -
> >that's a weird one.  Anyone?
> >
> >> Since the piston is part of a "closed loop"
> feedback
> >> system, it will hunt or
> >> flutter around it's balance or set point. In this
> >> steady state mode, the
> >> dashpot works to filter out this hunting and
> >> stabilize the piston. The
> >> thicker the oil, the more dampening to the
> control
> >> loop.
> >>
> >> Upon acceleration, the dashpot retards the
> otherwise
> >> rapid rise of the
> >> piston in response to the increase in vacuum.
> This
> >> increases the velocity of
> >> the air past the fuel jet and temporarily
> enrichens
> >> the fuel mixture
> >> providing a similar effect as an accelerator
> pump.
> >> The thicker the oil, the
> >> more "accelerator pump" action is achieved.
> >>
> >> If the oil is too thin, fluttering at steady
> >> throttle opening will occur as
> >> well as stumbling upon acceleration.
> >>
> >> Too thick an oil and you will get overly rich and
> >> sluggish acceleration.
> >>
> >> The owners manual for my '74 Midget calls for
> engine
> >> oil in the dashpots.
> >>
> >> I think most of this is mostly correct. Hope it
> >> helps.
> >>
> >> Richard
> >> '74 Midget (undergoing Arkley conversion)
> >> '58 Morris Minor 1000
> >> '68 MGBGT
> >
> >
> >=====
> >Ron Soave
> >"By trying we can easily learn to endure adversity.
> Another man's, I
> mean." - Mark Twain
> >
> >Yes, the Yahoo message below annoys me too.
> 
> 

=====
Ron Soave
"By trying we can easily learn to endure adversity. Another man's, I mean." - 
Mark Twain

Yes, the Yahoo message below annoys me too.

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