[DeTomaso] fuel pumps

Tue Nov 18 17:35:57 EST 2014

If I recall correctly, the welded bung in the bottom of the tank already extends at least 1/4" up into the tank. I'm not too concerned with crap from the bottom of the tank.  My tank was spotless inside before reinstalling the engine and I added a serviceable pre-filter between the tank and the pump and the obligatory fuel filter between the pump and carb as well.  The only way crap will get into the tank is if it comes from the gas pump at a station, and I'd rather the crap gets removed from the bottom of my tank and trapped by the filter than left to collect and build up to the point of causing recurring problems.

My 2-cents. YMMV.
      From: Larry - Ohio Time <Larry at ohiotimecorp.com>
 To: 'Garth Rodericks' <garth_rodericks at yahoo.com>; adin at frontier.net 
Cc: detomaso at poca.com 
 Sent: Tuesday, November 18, 2014 12:56 PM
 Subject: RE: [DeTomaso] fuel pumps

The only thing I mite add is to weld a small nipple (1\2" long) onto the end
of the valve going into the tank so that you are not taking the fuel and
crap off the bottom of the tank into the line.

Larry (too much old crap) - Cleveland

-----Original Message-----
From: DeTomaso [mailto:detomaso-bounces at poca.com] On Behalf Of Garth
Rodericks via DeTomaso
Sent: Tuesday, November 18, 2014 3:40 PM
To: DeTomaso Mail List; adin at frontier.net
Subject: Re: [DeTomaso] fuel pumps

One more comment...
Note that this 90-degree valve is only 2.75" top to bottom, which means the
installed height is less since it threads into the drain plug bung in the
bottom of the
tank.http://images.jamestowndistributors.com/woeimages/hardware/large/56744-
1.jpg
Therefore, there are no valves, hoses or fittings to dangle below the
Pantera's chassis or frame rails to risk being broken off by speed bumps or
stray road debris.

      From: Garth Rodericks <garth_rodericks at yahoo.com>
 To: DeTomaso Mail List <detomaso at poca.com>; "adin at frontier.net"
<adin at frontier.net> 
 Sent: Tuesday, November 18, 2014 12:35 PM
 Subject: fuel pumps

<<< Also, it seems any pump sucking through a tiny inlet will never be
happy. Anyone done a -8 upgrade from the tank to the pump? >>>
 Not a -8, but I plumbed mine with 3/8" (-6).
I went with the RobbMC pump and pre-filter on my 383 stroker Cleveland when
the Holley mechanical pump began leaking.I plumbed it from the bottom of the
tank with a 1/2" 90-degree stainless marine fuel valve from Groco.   
http://www.jamestowndistributors.com/userportal/show_product.do?pid=56744
and 3/8" steel fuel line from the pump to the top of the engine where it
goes through a fuel filter right before the carb inlet.

The biggest issue, regardless of where you plumb your fuel line from is the
restriction in the banjo fitting or elbow.  The stock banjo fitting on the
top of the tank forces all the fuel through a small orifice that's about
1/8" in diameter.  And many 90-degree fittings significantly restrict fuel
flow as well.  I went with the 1/2" Groco Marine fitting so it wouldn't
become the bottleneck that starves my engine for fuel.
Cheers!Garth#4033

-------------- next part --------------
   If I recall correctly, the welded bung in the bottom of the tank
   already extends at least 1/4" up into the tank. I'm not too concerned
   with crap from the bottom of the tank.  My tank was spotless inside
   before reinstalling the engine and I added a serviceable pre-filter
   between the tank and the pump and the obligatory fuel filter between
   the pump and carb as well.  The only way crap will get into the tank is
   if it comes from the gas pump at a station, and I'd rather the crap
   gets removed from the bottom of my tank and trapped by the filter than
   left to collect and build up to the point of causing recurring
   problems.
   My 2-cents. YMMV.
     __________________________________________________________________

   From: Larry - Ohio Time <Larry at ohiotimecorp.com>
   To: 'Garth Rodericks' <garth_rodericks at yahoo.com>; adin at frontier.net
   Cc: detomaso at poca.com
   Sent: Tuesday, November 18, 2014 12:56 PM
   Subject: RE: [DeTomaso] fuel pumps
   The only thing I mite add is to weld a small nipple (1\2" long) onto
   the end
   of the valve going into the tank so that you are not taking the fuel
   and
   crap off the bottom of the tank into the line.
   Larry (too much old crap) - Cleveland
   -----Original Message-----
   From: DeTomaso [mailto:[1]detomaso-bounces at poca.com] On Behalf Of Garth
   Rodericks via DeTomaso
   Sent: Tuesday, November 18, 2014 3:40 PM
   To: DeTomaso Mail List; [2]adin at frontier.net
   Subject: Re: [DeTomaso] fuel pumps
   One more comment...
   Note that this 90-degree valve is only 2.75" top to bottom, which means
   the
   installed height is less since it threads into the drain plug bung in
   the
   bottom of the
   tank.http://images.jamestowndistributors.com/woeimages/hardware/large/5
   6744-
   1.jpg
   Therefore, there are no valves, hoses or fittings to dangle below the
   Pantera's chassis or frame rails to risk being broken off by speed
   bumps or
   stray road debris.
         From: Garth Rodericks <[3]garth_rodericks at yahoo.com>
   To: DeTomaso Mail List <[4]detomaso at poca.com>; "[5]adin at frontier.net"
   <[6]adin at frontier.net>
   Sent: Tuesday, November 18, 2014 12:35 PM
   Subject: fuel pumps

   <<< Also, it seems any pump sucking through a tiny inlet will never be
   happy. Anyone done a -8 upgrade from the tank to the pump? >>>
    Not a -8, but I plumbed mine with 3/8" (-6).
   I went with the RobbMC pump and pre-filter on my 383 stroker Cleveland
   when
   the Holley mechanical pump began leaking.I plumbed it from the bottom
   of the
   tank with a 1/2" 90-degree stainless marine fuel valve from Groco.
   [7]http://www.jamestowndistributors.com/userportal/show_product.do?pid=
   56744
   and 3/8" steel fuel line from the pump to the top of the engine where
   it
   goes through a fuel filter right before the carb inlet.
   The biggest issue, regardless of where you plumb your fuel line from is
   the
   restriction in the banjo fitting or elbow.  The stock banjo fitting on
   the
   top of the tank forces all the fuel through a small orifice that's
   about
   1/8" in diameter.  And many 90-degree fittings significantly restrict
   fuel
   flow as well.  I went with the 1/2" Groco Marine fitting so it wouldn't
   become the bottleneck that starves my engine for fuel.
   Cheers!Garth#4033

References

   1. mailto:detomaso-bounces at poca.com
   2. mailto:adin at frontier.net
   3. mailto:garth_rodericks at yahoo.com
   4. mailto:detomaso at poca.com
   5. mailto:adin at frontier.net
   6. mailto:adin at frontier.net
   7. http://www.jamestowndistributors.com/userportal/show_product.do?pid=56744