spridgets
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Re: dashpot oil

To: soavero@yahoo.com
Subject: Re: dashpot oil
Date: Mon, 13 Mar 2000 12:47:19 EST
Cc: mbelect@mindspring.com, cdsorkin@ix.netcom.com, spridgets@autox.team.net
References: <20000313165704.19630.qmail@web1106.mail.yahoo.com>
About losing oil.

Perhaps they are being over filled and they are just going to the correct
level during use.  The illustrations I have of the HS2 carbs show the oil
level about 1/2" or more down from the top of the oil chamber.

Paul 
PAsgeirsson@juno.com

On Mon, 13 Mar 2000 08:57:04 -0800 (PST) Ron Soave <soavero@yahoo.com>
writes:
>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.

http://dl.www.juno.com/get/tagj.

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