[DeTomaso] fuel injection fuel pump in gas tank

[Julian Kift]

I would say the answer to your question regarding worry is; it depends, but EFI pumps do not like to run dry, it significantly shortens their life.


Is this a street or race application? Higher g forces would obviously increase the fuel riding up the tank and more likely to create a situation where the pump could run dry.

What is the shape of the tank? A long flatter tank will have more tendency to slosh fuel around when low.

How easy is it to access and replace the pump if need be?

What type of pump are you using, internal bypass or external fuel pressure regulator? Try to have any external bypass return mounted relatively close to the fuel pump pickup.


Typical modern systems place the pump in a well or sump to provide constant head of fuel. You might consider fabricating a baffle around the pump, a simple open top/bottom box with the pump mounted inside is a big help to retain some fuel in proximity to the pickup for short deviations, that is assuming you are not running at speed on an oval! Think of it like your Pantera baffled oil pan pickup. Alternatively you could also place foam in the tank to help prevent fuel slosh.


Any good quality automotive electrical wire should hold up just fine.


Julian

________________________________
From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of Rich Hoppe <richbhoppe at gmail.com>
Sent: Monday, February 13, 2017 12:08 PM
To: DeTomaso at server.detomasolist.com
Subject: [DeTomaso] fuel injection fuel pump in gas tank

I am working on one of my cars to install a fuel injection system.
I purchased a "tanks" electric fuel pump that mounts in the gas tank.
The company tanks is concerned that I don't have a baffle in the tank and
said they will not honor a warranty because they are afraid that the pump
will burn up due to running dry while cornering.

Does anyone have experience with an electric pump in the tank?
should I worry about this?

Second question is I need to extend the electric lines in the tank down to
the pump.
Do I need to get special wires that can handle the fuels or do the std
plastic coated wires work without a problem?

Thanks Rich
-------------- next part --------------
   I would say the answer to your question regarding worry is; it depends,
   but EFI pumps do not like to run dry, it significantly shortens their
   life.

   Is this a street or race application? Higher g forces would obviously
   increase the fuel riding up the tank and more likely to create a
   situation where the pump could run dry.

   What is the shape of the tank? A long flatter tank will have more
   tendency to slosh fuel around when low.

   How easy is it to access and replace the pump if need be?

   What type of pump are you using, internal bypass or external fuel
   pressure regulator? Try to have any external bypass return
   mounted relatively close to the fuel pump pickup.

   Typical modern systems place the pump in a well or sump to provide
   constant head of fuel. You might consider fabricating a baffle around
   the pump, a simple open top/bottom box with the pump mounted inside is
   a big help to retain some fuel in proximity to the pickup for short
   deviations, that is assuming you are not running at speed on an oval!
   Think of it like your Pantera baffled oil pan pickup. Alternatively you
   could also place foam in the tank to help prevent fuel slosh.

   Any good quality automotive electrical wire should hold up just fine.

   Julian
     __________________________________________________________________

   From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of
   Rich Hoppe <richbhoppe at gmail.com>
   Sent: Monday, February 13, 2017 12:08 PM
   To: DeTomaso at server.detomasolist.com
   Subject: [DeTomaso] fuel injection fuel pump in gas tank

   I am working on one of my cars to install a fuel injection system.
   I purchased a "tanks" electric fuel pump that mounts in the gas tank.
   The company tanks is concerned that I don't have a baffle in the tank
   and
   said they will not honor a warranty because they are afraid that the
   pump
   will burn up due to running dry while cornering.
   Does anyone have experience with an electric pump in the tank?
   should I worry about this?
   Second question is I need to extend the electric lines in the tank down
   to
   the pump.
   Do I need to get special wires that can handle the fuels or do the std
   plastic coated wires work without a problem?
   Thanks Rich