RE: [Chrysler300] Electric Fuel Pump

["mgoodknight@xxxxxxxx" <mgoodknight@xxxxxxxx>]

"Vented-bowl" carburetors will lose fuel when in storage.  Carburetor rebuilding will not prevent that normal evaporation loss.  Gravity fed systems remain filled, but suffer even more from gum formation as the lighter components of the fuel escape.
I personally have a preference for refilling the carburetor bowls by some means other than running the starter motor and depleting the battery's charge.  It is of debatable value to build the oil pressure by cranking the engine with the starter.   If you had a "pre-lube" pump that would pressurize the system without turning the crankshaft, then it would be beneficial to use such a device.  Cranking speeds will not lubricate pistons, cam lobes, and other components that require splashing of oil.  I want the most immediate start possible and then I operate the engine at a slightly elevated idle speed for a few seconds before putting it to work or running it faster.
Everyone is entitled to an opinion.  I've tried to justify mine.
Marshall Goodkngiht---------- Original Message ----------
From: Andy Mikonis <r41hp@xxxxxxxxx>
To: chrysler300@xxxxxxxxxxxxxxx
Subject: RE: [Chrysler300] Electric Fuel Pump
Date: Sat, 26 Jun 2010 00:31:38 -0700 (PDT)

  
I may not have been born until 1968, but from my observations millions of 1950s/1960s and older cars drove billions of miles without an extra/added electric fuel pump. My feeling is your time/money would be better spent freshening the carbs every few years and making the chokes work properly.
 
Also, here's a question: if you have to crank your car extra times after storage, doesn't that actually build up some oil pressure before it fires? Maybe it's a good thing?

--- On Fri, 6/25/10, Richard Barber <c300@xxxxxxx> wrote:

From: Richard Barber <c300@xxxxxxx>
Subject: RE: [Chrysler300] Electric Fuel Pump
To: "'Rich Barber'" <c300@xxxxxxx>, "'Mark Lindahl'" <mplindahl@xxxxxxxxxxxxx>, chrysler300@xxxxxxxxxxxxxxx
Date: Friday, June 25, 2010, 11:05 PM

 

Thanks to several of you who responded that mechanical fuel pump failure

often results from a ruptured diaphragm in the fuel pump body and that there

is gasoline on one side of the diaphragm and the engine's crankcase on the

other. Energizing a rear-mounted electric fuel pump may then flood the

crankcase with low-viscosity/0 weight non-lubricating and highly flammable

gasoline. Subsequent high speed disassembly should then be anticipated. 

I'll fabricate a jumper to bypass the fuel pump, invest in a handful of

tubing fitting wrenches and I'll be prepared for that eventuality. Probably

easier just to carry a spare mechanical fuel pump.

Thanks again for the advice not to trash my engine or torch my car. Great

call.

C-300'ly,

Rich Barber

Brentwood, CA

1955 C-300 (Hoping to see some of you at the Capital City MoPars show

tomorrow in Sacramento www.capitalcitymopars.com )

From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On

Behalf Of Rich Barber

Sent: Friday, June 25, 2010 9:31 AM

To: 'Mark Lindahl'; chrysler300@xxxxxxxxxxxxxxx

Subject: RE: [Chrysler300] Electric Fuel Pump

I installed an electric fuel pump near the gas tank and wired it so that it

would only run when a button switch hidden under the dash is pushed, the

ignition key is in the crank position and the gear selector is in drive so

the engine will not crank. I only use it when the car fails to start

immediately. I can hear the electric pump running and when the pitch

changes, I know the carbs are full, the floats are closing the float valves

and the car is ready to start with one pump of the accelerator pedal. I

left the rebuilt mechanical pump in place and fuel flows through the

electric pump when it is not running. I also added a pigtail that could be

connected to a hot terminal for continuous running in case of a fuel pump

failure.

This has made all the difference in the world in having confidence the car

will start easily during any condition and I do use it about 50% of the

time.

C-300'ly,

Rich Barber

1955 Chrysler 300

_____ 

From: Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com>

[mailto:Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com> ]

On

Behalf Of Mark Lindahl

Sent: Friday, June 25, 2010 5:39aa AM

To: chrysler300@xxxxxxxxxxxxxxx <mailto:chrysler300%40yahoogroups.com> 

Subject: [Chrysler300] Electric Fuel Pump

Hello,

I would appreciate any suggestions for a good electric fuel pump for a

3256SA Carter AFB.

After the fuel pump is installed, is it common for the push rod to be

removed from the stock pump?

I am still having to crank the engine a lot to get fuel to the carb on cold

starts.

I believe the best place to mount an electric fuel pump is near the rear

axle?

Any other suggestions?

Thanks,

Mark Lindahl

'63 300 Conv.

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