Fuel usage math, intank pumps
Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 293
From: woodbine, md
Fuel usage math, intank pumps In another post I mentioned wanting to use the dual tanks in my C10-I kind of thinking toward using
an AEM 380 in each tank. 380 LPH, X 1.63=619 gallons an hour. Looking at my Holley fuel map, using
aprx 14 LBs boost, I would be using aprx 337 lbs/hr of fuel, (given fuel pressure will affect it). I found a
valve that should easily flow more than I need to switch tanks. The only thing I need to figure out is
after cutting a hole in the tank (I have a 3 1/2 x 5 1/2 flat area I can use) what I can make up to hold the
pump, and have a feed/return and seal it-something like the Tanks Inc setup, but its 6" in dia, otherwise I
would use them.
an AEM 380 in each tank. 380 LPH, X 1.63=619 gallons an hour. Looking at my Holley fuel map, using
aprx 14 LBs boost, I would be using aprx 337 lbs/hr of fuel, (given fuel pressure will affect it). I found a
valve that should easily flow more than I need to switch tanks. The only thing I need to figure out is
after cutting a hole in the tank (I have a 3 1/2 x 5 1/2 flat area I can use) what I can make up to hold the
pump, and have a feed/return and seal it-something like the Tanks Inc setup, but its 6" in dia, otherwise I
would use them.
TECH Fanatic
Joined: Sep 2013
Posts: 1,008
Likes: 126
From: Mechanicsburg, PA
The bad part of these trucks with dual tanks is the size. They each only hold about 15 gallons (usable). That and you have to fill each from different sides of the truck. Not an easy task at today's gas pumps. Hoses don't reach and the people start dialing the cops when you lay the nozzle on the ground to turn your truck around. I would do a large factory single saddle tank (28 gallons I think) or one between the frame rails in the rear, Pinto style lol
The bad part of these trucks with dual tanks is the size. They each only hold about 15 gallons (usable). That and you have to fill each from different sides of the truck. Not an easy task at today's gas pumps. Hoses don't reach and the people start dialing the cops when you lay the nozzle on the ground to turn your truck around. I would do a large factory single saddle tank (28 gallons I think) or one between the frame rails in the rear, Pinto style lol
Last edited by LLLosingit; Nov 16, 2018 at 09:42 PM.
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Joined: Nov 2003
Posts: 13,616
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From: Norn Iron
The bad part of these trucks with dual tanks is the size. They each only hold about 15 gallons (usable). That and you have to fill each from different sides of the truck. Not an easy task at today's gas pumps. Hoses don't reach and the people start dialing the cops when you lay the nozzle on the ground to turn your truck around. I would do a large factory single saddle tank (28 gallons I think) or one between the frame rails in the rear, Pinto style lol
But I would never recommend running two separate pumps from two separate tanks for the main supply to the engine. It's just asking for trouble.
if for some reason you must insist on something like that, then run two low pressure pumps to a surge tank/pumps and feed the engine from that
TECH Fanatic
Joined: Sep 2013
Posts: 1,008
Likes: 126
From: Mechanicsburg, PA
Maybe it's just my area, but people are in your business constantly around here. I'm glad there are areas still laid back.
Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 293
From: woodbine, md
Still pushing around ideas, I had looked at using a tank in the back, but they hang down pretty low,
not wild about that, and most you have to fill thru the bed. I may just use a stock 1987 tank/pump
on the pass side, use it to feed DS, have the big pump in the DS and as the feed. But I lose the ability
to have a back up pump. I got time, more thinking to do.
not wild about that, and most you have to fill thru the bed. I may just use a stock 1987 tank/pump
on the pass side, use it to feed DS, have the big pump in the DS and as the feed. But I lose the ability
to have a back up pump. I got time, more thinking to do.
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From: Norn Iron
Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 293
From: woodbine, md
What I ended up with doing is using 2 1987 tanks (fuel inj ones), they have the baffle in them
for the pumps. I got a L and R sending unit w/o pumps, and bought 2 Walbro 450 pumps. I moded
the sending units for AN fittings (comp. to #6 return, #8 feed) and made the pumps fit the sensors.
I used a piece of submersible hose to connect pumps to outlets. Everything will go to the large
brass 6 way valve, I'll go with this and see how it goes. Hopefully I can reg. pressure no problem, lol.
Using the orig plastic valve for switching tank senders.
for the pumps. I got a L and R sending unit w/o pumps, and bought 2 Walbro 450 pumps. I moded
the sending units for AN fittings (comp. to #6 return, #8 feed) and made the pumps fit the sensors.
I used a piece of submersible hose to connect pumps to outlets. Everything will go to the large
brass 6 way valve, I'll go with this and see how it goes. Hopefully I can reg. pressure no problem, lol.
Using the orig plastic valve for switching tank senders.