<VV> Healthy pumps?

[corvairduval at cox.net]

It makes perfect sense to me. Most every mechanical fuel pump used since
the demise of the vacuum tank works this way.

There is usually a small spring to take up the slack. On the Corvair pump,
the spring is on the push rod below the pump.

Frank DuVal


Original Message:
-----------------
From: corvairs corvairs at pacifier.com
Date: Fri, 18 Jul 2008 09:42:09 -0700
To: bryan at skiblack.com, virtualvairs at corvair.org
Subject: Re: <VV> Healthy pumps?


Yeah, the only problem is, are we to believe that the diaphram assembly 
sits off away from the pump rod and they bang back and forth 
indescriminatly until pressure is needed again? Picture this scenario 
and tell me if it makes sense. Lon


Bryan Blackwell wrote:
> After thinking about this for a bit, it makes perfect sense - if you  
> used the eccentric to drive the fuel pressure, then the pressure  
> generated would easily be able to overcome the inlet needles if  
> something got stuck (think jammed relief valve).  This way, the  
> spring generates the pressure, and basically it can't ever go over  
> whatever stiffness the spring has.  Slick.
>
> --Bryan
>   

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