spridgets
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Re: dashpot oil

To: "Ron Soave" <soavero@yahoo.com>
Subject: Re: dashpot oil
Date: Mon, 13 Mar 2000 09:15:10 -0800charset="iso-8859-1"
Cc: <spridgets@autox.team.net>
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.


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