RE: [Chrysler300] Re: AUXILLARY FUEL PUMP

["John McAdams" <clafong@xxxxxxxxxxxxx>]

While we are on the subject of fuel pumps - the mechanical pumps in
particular.  I would suggest always carrying a spare fuel pump pushrod.  I
have loaned (given) at least two out to club members in the past at meets
because their mechanical pumps have either stopped pumping altogether or
have started to starve the carbs to a lean condition at highway speeds. 

The pushrods wear down such that the fuel pump actuating lever does not get
enough stroke from the lobe on the cam to give you a full pulse of fuel per
each stroke.

 They are cheap insurance and don't take up a lot of room in the tool box.

Big John Mc Adams
(In SoCal)

-----Original Message-----
From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
Behalf Of Ryan Hill
Sent: Friday, October 14, 2011 11:25 AM
To: paulholm@xxxxxxxxxxxxx; chrysler300@xxxxxxxxxxxxxxx
Subject: RE: [Chrysler300] Re: AUXILLARY FUEL PUMP


Many of us have run electric pumps alone that way without incident but it's
dangerous if you're running a mechanical pump as well, especially with
modern fuels that seem to deteriorate the mechanical pumps faster than in
the good old days. 
 
Also, if you're running an electric pump full time as your only pump on a
carburated car, I would think you should have a low oil pressure kill switch
or inertia switch installed in the event of an accident where the key is not
turned off. Nothing like having a fuel line rupture and a pump continuing to
run and spray raw fuel all over. 

Ryan Hill 
 



To: chrysler300@xxxxxxxxxxxxxxx
From: paulholm@xxxxxxxxxxxxx
Date: Fri, 14 Oct 2011 13:54:07 -0400
Subject: Re: [Chrysler300] Re: AUXILLARY FUEL PUMP


  



On 10/14/2011 1:27 PM, Ryan Hill wrote:
>
> One important thing to remember when running an auxiliary electric pump
like this. If the electric pump is left running and your mechanical pump
fails, you could potentially fill your engine with fuel. (If the diaphragm
fails, it will leak internally) The damage can be catastrophic! Also, in the
past, some have mentioned the convenience of having a second pumping source
to limp home on in the event their mechanical pump fails......this should
only be done after bypassing the mechanical pump for the same reason.

> Make sure the pump is being shut off, I would set it up with a push button
rather than a switch so it's only on when I push it to prime the carb.

> Ryan Hill

way back when, we used to just wire the pump to the 'hot when key on' 
source that way if the key was off and out the pump was Not running

-- 
Paul Holmgren
Mine: 2 57 300-C's in Indy
Hers: 05 PT GT R/T HO Stage 1
Hoosier Corps L#6



 		 	   		  

[Non-text portions of this message have been removed]



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