<VV> Fuel pressure

[RoboMan91324 at aol.com]

Joel,
 
Your vapor lock and high fuel pressure are likely to be two  different 
issues.  The high pressure occurs on the push side of the pump  and the vapor 
lock occurs in the pump itself and/or in the suck side of the fuel  system 
inside the engine compartment.
 
A properly sized and installed electric pump in or at the tank  will solve 
both problems or at least treat the symptoms.  In the mean time,  opening 
the engine compartment lid when you park might prevent or at least  reduce the 
recovery time from the vapor lock.  That is, of course, unless  you are 
worried about people snooping around in your engine  compartment.
 
Another way to possibly put a patch on the problem is to let  the engine 
idle for a minute or two before you shut it down.
 
Lastly, just because the "engine doesn't seem to run hot."  doesn't mean it 
isn't running hot.  In fact, having vapor lock is a near  certain 
indication that you are running hot.  "Almost no pinging" is still  pinging which, 
combined with overheating, has probably killed more Corvair  engines than all 
other reasons combined.  Replacing the mechanical pump  with an electric 
pump may just eliminate the symptoms of the real problem which  could 
eventually kill your engine.  A heat problem may be something as  simple as a mouse 
nest, a rag or whatever under the turkey roaster and checking  that first is 
much easier and cheaper than installing an electric  pump.
 
Good luck and let us know the solution.
 
Doc
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 
In a message dated 10/19/2016 1:18:05 P.M. Pacific Daylight Time,  
virtualvairs-request at corvair.org writes:

Message:  1
Date: Wed, 19 Oct 2016 17:49:54 +0000
From: Joel McGregor  <joel at joelsplace.com>
To: "virtualvairs at corvair.org"  <virtualvairs at corvair.org>
Subject: <VV> Fuel  pressure
Message-ID:
<27D1EC0369826D478297DD86D9DE5E2CBDB91BEC at 2012SBS.joelsplace.local>
Content-Type:  text/plain; charset="us-ascii"

I've been chasing an odd vapor lock  problem and discovered that my fuel 
pressure is 7.5psi.  I replaced the  pump with a new Clark's pump and now it's 
7.75psi.  The book calls for  4-5.  I've taken springs out of old pumps 
before to get the pressure down  in new pumps.  Are there any correct springs 
available?  If not,  what kind and size wire should I buy to make my own?

Is there a cross  available to replace the output T so I can add a pressure 
gauge?

Is  there a low pressure electric gauge available so I can monitor  
pressure?

Thanks,
Joel  McGregor




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