<VV> Electric Fuel Pump Install?

Tue Mar 13 14:32:52 EDT 2018

The Ford inertial safety switch essentially monitors if the vehicle has 
been in an accident and shuts off the fuel pump for that event until the 
safety switch has been mechanically reset.

An electrical fuel pump solves several problems of the mechanical pump 
and does it with better reliability.   The mechanical fuel pump has a 
potential issue where a failure of the mechanical fuel pump's diaphram 
can fill the crankcase with fuel.   A mechanical fuel pump is 
susceptible to vapor lock and an electrical fuel pump solves that issue 
very well.  A mechanical fuel pump can suffer from external fuel leaks 
caused by the internal seals drying out and causing a fuel leak, which 
can create a potential fire hazard.   An electrical fuel pump can 
pressurize and fill the carbs enabling the engine to start much faster 
when the vehicle has been sitting for weeks or longer.  This can 
contribute to less engine wear and longer engine life.   The mechanical 
fuel pump might suffer from dropping internal valves that were not 
adequately staked into position.   Many of our experienced Corvair 
mechanics swear that electric fuel pumps are more reliable and safer for 
our Corvairs.

An electric fuel pump requires that the rubber fuel line connected to 
the fuel pump outlet is in good condition and does not leak, otherwise 
the pressurized fuel line from the electric fuel pump can spray fuel 
under the car potentially creating a fire hazard.   There should be NO 
rubber fuel lines in the engine compartment.

Larry

On 3/13/2018 10:26 AM, Tom Berg via VirtualVairs wrote:
> G'day, Carl...
> Can't help you with those diagrams because I never installed an electric fuel pump. They don't agree probably because they were individually conjured by suppliers of the individual parts, without much consideration for each other. BTW, what's an inertia switch for -- to measure vehicle movement?
> I did own a Corvan that had an electric fuel pump and an oil pressure shut off switch, and it was more trouble than it was worth. When the engine was hot, oil thinned and pressure dropped, and if it was a quart down, pressure dropped more and the switch shut off fuel and the engine quit, even if it was not in danger.
> I did have a friend install a simple on-line electric pump on a Rampside whose stock mechanical pump could not draw enough fuel  to wet the carbs after the truck had been sitting a while. A toggle switch in the engine compartment activated this pump when needed. Otherwise it remained off because the mechanical pump was sufficient. My advice is to get a good mechanical pump and abandon the electric pump project. The mechanical vs. electric pump issue was debated in the mid '90s and it started with a bunch of faulty mechanical pumps getting onto the market. The "fix" was installing an electric pump. IMO, you will have less grief by using a good mechanical pump. And you'll conserve some previous hair!
> This is the cue for advocates of electric pumps to wade in. Be not confused by them! Salvation layeth with simplicity!
> --Tom in Ohio, USA
>
> Sent from Yahoo Mail on Android
>
>    On Tue, Mar 13, 2018 at 9:50 AM, Arlette Pat&  Carl Kelsen via VirtualVairs<virtualvairs at corvair.org>  wrote:   G’day everyone from Australia ‘down under’
> Well here’s my latest Corvair problem! Hopefully someone can help, because I am pulling what little hair I have left from frustration?
> I am experiencing considerably difficulty drawing up an electrical wiring diagram, that will agree with the (3) three sets of individual instructions supplied with each of the following Clarks Corvair supplied parts:
>
>    1.  Electric Fuel Pump (Part No. C10295)
>    2.  Oil Pressure Safety Switch
>    3.  Inertia Safety Switch
> I firmly believe that others must have also been confused by these quite vague instructions or alternatively have unknowingly installed the two ‘safety switches’ incorrectly to the point that the safety switches might not work if the need came about.
> By carefully following the electrical instructions provided for the Electric Fuel Pump and the Oil Pressure safety switch I have produced what I believe is a compliant wiring diagram that follows the pump and oil pressure switch instructions.
> However, this diagram does not agree with the instructions that came with the Inertia safety switch and if I attempt to comply with the instructions for the Inertia switch, then my diagram no longer agrees with the instructions for the pump and oil pressure switches?
> I really want to install both switches but can’t determine the correct wiring for them. I have asked Clarks Corvair but have not yet had a reply.
> I firmly believe that a CLEAR wiring diagram showing the correct position for each component, switch, fuse etc., in the electrical circuit would resolve my concerns and perhaps more importantly prevent these switches from being incorrectly installed and as consequence being ‘useless’. I have extensively searched the internet but have found nothing. Lots on Electric Fuel Pumps and the switches but nothing on the correct way to install all three together.
> A good friend of mine (a retired Auto Electrician) after studying the original instructions and my wiring diagram, agrees that the original Clarks Corvair provided instructions simply don’t agree with each other and are at best “vague”.
> I will try to scan / attach a copy of my wiring diagram on this email. Has anyone got any advice on this issue or can anyone tell me where I am going wrong?
> Regards
> Carl Kelsen
> ’65 RHD Monza convertible
> Melbourne, Victoria, Australia
> [cid:fd91cf43-7310-42f7-8d0d-ebce753010c0]
>
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