[DeTomaso] mechanical fuel pump

jderyke at aol.com jderyke at aol.com
Mon Nov 17 16:27:53 EST 2014 

Re #5- Quite true. I've had an '87 Ford pickup truck electric in-tank fuel pump running in our Pantera for maybe 5 years. The how-to was the subject of a POCA Newsletter article. I use it as a primer or a bail-out pump if CA gas (which as a Nevada resident, we are stuck with) fails the rubber pump diaphragm in stock mechanical pumps. This e-pump is for BBF throttle-body injection (TBI) which runs at 12 psi, so a cheap regulator steps pressure down to 6- 8psi with no complications. It's wired in with a special three-way toggle: Left is 'momentary' and must be held on to operate. This is my 'primer' to refill the carb after sitting awhile. Center is OFF, and Right is On-until-switched-off, so in emergencies it could run for hours without holding the toggle on. The lines are Y-ed together with check-valves to prevent backflow.

The other interesting thing is, a stock Ford multiport EFI electric pump is physically the same dimension as my TBI pump, so a stock or aftermarket in-tank EFI pump would also fit inside an unaltered Pantera fuel tank. But be warned- the 48-55 psi of a multiport EFI pump cannot simply be stepped down to 6-8 psi. What happens is, so much backpressure develops that the EFI pump overheats and a thermal overload circuit in the pump shuts it down. Repeated attempts will permanently fail the backup fusible link in the pump. 

 

 

 

-----Original Message-----
From: cengles <cengles at cox.net>
To: bill <bill at incendium.com>
Cc: detomaso <detomaso at poca.com>
Sent: Mon, Nov 17, 2014 5:32 am
Subject: Re: [DeTomaso] mechanical fuel pump


   Dear Bill,

   1) the typical hipo mechanical fuel pumps are no longer available.
   Holley and others don't make hipo mechanical fuel pumps for Clevelands

   2)  the remaining readily available option is the plain vanilla stock
   fuel pump, which is adequate for modest and moderate use, but it is
   limited for hipo engines

   3)  Julian's note about the McCarr (?) super hipo and pricey high
   output mechanical Cleveland fuel pump is correct.

   4)  One other option is to have an older Holley, etc, hipo fuel pump
   rebuilt.  That is the option that I will be using in short order.

   5)  I am told that it is possible to somehow use a low power (?)
   electric fuel pump at a cost less than the McCarr unit.  IIRC, Jack
   DeRyke discussed this.

                       Warmest regards, Chuck Engles

   On Sun, Nov 16, 2014 at 11:02 AM, Bill Moore wrote:

   > Hello All :

   >

   > The old tired engine is gone. I'm getting a 408C as a replacement, a
   slight

   > upgrade. The question of the day and there will be more I'm sure is,
   "what

   > mechanical fuel pump should we use and who supplies them" ?

   >

   >

   >

   >

   >

   > Cheers:

   >

   >

   >

   > Please use my bill at incendium.com email address in all messages.

   >

   >

   >

   > Bill Moore

   >

   > Incendium Supply Ltd.

   >

   > Suite 416, #305-4625 Varsity Drive N.W.

   >

   > Calgary, AB T3A 0Z9

   >

   > 403.202.0055

   >

   >

   >

   >

   >

   >      ------------------------------

   >

   > _______________________________________________

   >

   > Detomaso Forum Managed by POCA

   >

   > DeTomaso mailing list

   > DeTomaso at poca.com

   > http://poca.com/mailman/listinfo/detomaso_poca.com

 
_______________________________________________

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DeTomaso mailing list
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-------------- next part --------------
   Re #5- Quite true. I've had an '87 Ford pickup truck electric in-tank
   fuel pump running in our Pantera for maybe 5 years. The how-to was the
   subject of a POCA Newsletter article. I use it as a primer or a
   bail-out pump if CA gas (which as a Nevada resident, we are stuck with)
   fails the rubber pump diaphragm in stock mechanical pumps. This e-pump
   is for BBF throttle-body injection (TBI) which runs at 12 psi, so a
   cheap regulator steps pressure down to 6- 8psi with no complications.
   It's wired in with a special three-way toggle: Left is 'momentary' and
   must be held on to operate. This is my 'primer' to refill the carb
   after sitting awhile. Center is OFF, and Right is
   On-until-switched-off, so in emergencies it could run for hours without
   holding the toggle on. The lines are Y-ed together with check-valves to
   prevent backflow.
   The other interesting thing is, a stock Ford multiport EFI electric
   pump is physically the same dimension as my TBI pump, so a stock or
   aftermarket in-tank EFI pump would also fit inside an unaltered Pantera
   fuel tank. But be warned- the 48-55 psi of a multiport EFI pump cannot
   simply be stepped down to 6-8 psi. What happens is, so much
   backpressure develops that the EFI pump overheats and a thermal
   overload circuit in the pump shuts it down. Repeated attempts will
   permanently fail the backup fusible link in the pump.

   -----Original Message-----
   From: cengles <cengles at cox.net>
   To: bill <bill at incendium.com>
   Cc: detomaso <detomaso at poca.com>
   Sent: Mon, Nov 17, 2014 5:32 am
   Subject: Re: [DeTomaso] mechanical fuel pump
   Dear Bill,

   1) the typical hipo mechanical fuel pumps are no longer available.
   Holley and others don't make hipo mechanical fuel pumps for Clevelands

   2)  the remaining readily available option is the plain vanilla stock
   fuel pump, which is adequate for modest and moderate use, but it is
   limited for hipo engines

   3)  Julian's note about the McCarr (?) super hipo and pricey high
   output mechanical Cleveland fuel pump is correct.

   4)  One other option is to have an older Holley, etc, hipo fuel pump
   rebuilt.  That is the option that I will be using in short order.

   5)  I am told that it is possible to somehow use a low power (?)
   electric fuel pump at a cost less than the McCarr unit.  IIRC, Jack
   DeRyke discussed this.

                       Warmest regards, Chuck Engles

   On Sun, Nov 16, 2014 at 11:02 AM, Bill Moore wrote:

   > Hello All :

   >

   > The old tired engine is gone. I'm getting a 408C as a replacement, a
   slight

   > upgrade. The question of the day and there will be more I'm sure is,
   "what

   > mechanical fuel pump should we use and who supplies them" ?

   >

   >

   >

   >

   >

   > Cheers:

   >

   >

   >

   > Please use my [1]bill at incendium.com email address in all messages.

   >

   >

   >

   > Bill Moore

   >

   > Incendium Supply Ltd.

   >

   > Suite 416, #305-4625 Varsity Drive N.W.

   >

   > Calgary, AB T3A 0Z9

   >

   > 403.202.0055

   >

   >

   >

   >

   >

   >      ------------------------------

   >

   > _______________________________________________

   >

   > Detomaso Forum Managed by POCA

   >

   > DeTomaso mailing list

   > [2]DeTomaso at poca.com

   > [3]http://poca.com/mailman/listinfo/detomaso_poca.com

_______________________________________________

Detomaso Forum Managed by POCA

DeTomaso mailing list
[4]DeTomaso at poca.com
[5]http://poca.com/mailman/listinfo/detomaso_poca.com

References

   1. mailto:bill at incendium.com
   2. mailto:DeTomaso at poca.com
   3. http://poca.com/mailman/listinfo/detomaso_poca.com
   4. mailto:DeTomaso at poca.com
   5. http://poca.com/mailman/listinfo/detomaso_poca.com

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