Triple Tanks? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

thirdstreettito · 01-23-2009, 04:20 PM

How hard would it be to mount a saddle tank on each side and a blazer tank between the rails? I would have a panel in the dash with 3 switches 1 for each tank. And I'd like to be able to use 2 tanks at once. On an M1008(5/4t RCLB 4x4).

87Bob · 01-23-2009, 04:50 PM

Quote:

Originally Posted by thirdstreettito

How hard would it be to mount a saddle tank on each side and a blazer tank between the rails? I would have a panel in the dash with 3 switches 1 for each tank. And I'd like to be able to use 2 tanks at once. On an M1008(5/4t RCLB 4x4).

What???? two tanks at once why? One would suck air when drained. I would think you could have three tanks but you would use them one at a time. The way I would do it is to use a blazer tank with a transfer pump to flow fuel in to an empty saddle tank and refill it. Another idea would be to look in a marine catalog as boat will sometimes have more than one tank and there is a manual valve availible to direct the fuel from which tank is being used. I had one on a boat I had years ago. That valve will only work with a single line supply if you are using fuel injection it won't work as you have no way to control the fuel return line.

willett · 01-23-2009, 05:13 PM

fuel cell?

thirdstreettito · 01-23-2009, 05:20 PM

Quote:

Originally Posted by 87Bob

What???? two tanks at once why? One would suck air when drained. I would think you could have three tanks but you would use them one at a time. The way I would do it is to use a blazer tank with a transfer pump to flow fuel in to an empty saddle tank and refill it. Another idea would be to look in a marine catalog as boat will sometimes have more than one tank and there is a manual valve availible to direct the fuel from which tank is being used. I had one on a boat I had years ago. That valve will only work with a single line supply if you are using fuel injection it won't work as you have no way to control the fuel return line.

2 at once for extreme performance. Also, I would have all 3 full, then drain them one at a time. It would be 2 25gal saddles and 1 25gal blazer(or fuel cell), a total of 75gal of fuel. What do stock 2 tank trucks use?

1969K10 · 01-23-2009, 05:29 PM

I've got an old floor switch from a LWB that had 3 tanks. You just selected 1 tank at a time...

The best way I would think of doing what you're talking about, would be to "T" connect the drain portion of the tanks, and add a "T" for an air line that connected the tanks. Then just run 1 line up to the fule pump. Would also allow for a return line to 1 of the tanks, since really they'd all be connected.

James McClure · 01-23-2009, 06:41 PM

If you go and run both stock tanks with the blazer tank seperately you'll run into trouble filling them as fuel will siphon from the tank your filling to the empty one. Also, if the full level in all 3 tanks is different your going to leak fuel until all 3 tanks are the same. If you run 3 tanks use them 1 at a time. Also if you punch a hole in one or spring a leak you won't loose all your fuel, only part of it. I can run from Albany NY to the IN OHio border on 2 tanks (23 gallons each) You need more? Put a 275Gallon fuel oil tank back there, LOLL. Jim

dieselarmy13 · 01-23-2009, 06:49 PM

Quote:

Originally Posted by thirdstreettito

2 at once for extreme performance. Also, I would have all 3 full, then drain them one at a time. It would be 2 25gal saddles and 1 25gal blazer(or fuel cell), a total of 75gal of fuel. What do stock 2 tank trucks use?

What the hell do you plan on doing with this truck?

Pyrotechnic · 01-23-2009, 09:44 PM

Well if it's a long bed, you can fit a Suburban tank. Something like 40 gallons.

Also, if you need extra fuel flow, don't use two tanks at once. Modify the sending units to have 1/2 inch pickup tubes, then run 1/2 inch fuel line or -8 AN line to the pump. Some manual valves would be best for this application, as no stock selector valve has that big of a fitting or can flow that much fuel.

silvereagle07 · 01-23-2009, 10:48 PM

Quote:

Originally Posted by dieselarmy13

What the hell do you plan on doing with this truck?

thirdstreettito · 01-23-2009, 11:18 PM

Thanks guys. You all really helped me out. I'll figure it all out when the time comes.

Quote:

Originally Posted by dieselarmy13

What the hell do you plan on doing with this truck?

You dont want to know...

rod86 · 01-24-2009, 12:08 AM

Quote:

Originally Posted by thirdstreettito

You dont want to know...

cmon do tell... inquiring minds are curious....

jrsmith_2010 · 01-24-2009, 01:54 AM

Quote:

Originally Posted by rod86

cmon do tell... inquiring minds are curious....

im wondering the same thing

dieselarmy13 · 01-24-2009, 03:05 AM

Quote:

Originally Posted by thirdstreettito

You dont want to know...

Oh.....but I do! Make sure we see pics of this mutha! If it takes three tanks to feed it, well, I can only imagine.....

andrewmp6 · 01-24-2009, 04:46 AM

Gonna enter a cannonball kinda run and don't want to stop for gas?

sick69 · 01-24-2009, 05:01 AM

Quote:

You dont want to know...

Yes actually we would like to know! lol What would you need that much fuel for? Planning on driving from one coast to the other in a hurry?

Frank

thirdstreettito · 01-24-2009, 11:54 AM

Well. I'll tell ya. I'll be getting it in the next 2 weeks, so no pics yet.

Plans (Always changing):
6.2L Diesel
Banks kit with bigger turbo and 4" exhaust
Twin turbo eventually
Stage 3 methanol injection
Huge injectors
More...about 300HP/500ftlbs when finished
NV5600 6-speed/Twin stick NP205
4:10:1 Gears, locker out back
2"-6" lift
32"-36" tires(depending on lift)
Class 5 hitch
Hidden gooseneck
Firestone helper bags
Custom front/rear tube bumpers w/ winches
And more and more

**special-K** · 01-24-2009, 12:17 PM

You have alot to learn.I ind listening works and tellin`doesn`t.I`m getting those specs from a single turbo.Hi-pop injectors are a waste w/o increased fuel delivery and that`s not accomplished by sucking from two tanks at once...bad theory,scratch that one.
You don`t want to 5th wheel with a lifted truck.You can`t physically fit 25 gallon tanks as saddle tanks.All more fuel capacity does is give longer cruise range.Over 50 gallons requires fuel hauling permit and invites DOT to inspect you like a big truck.Something I avoid like the plague.If the switch you`re refering to on the dash is the valve controlling which tank you run off of,each fuel line will be run into the cab and under the dash.Please don`t attempt this.I highly advise against such a dangerous and impracticle plan.
As others have asked,what do you plan to do with this truck?meaning,once it`s built.What`s the intended use requiring such unusual design changes?

thirdstreettito · 01-24-2009, 02:27 PM

It would be my DD and farm/hauling truck. Basically I want it to be able to do anything I need it to do.

**N2TRUX** · 01-24-2009, 04:19 PM

Bradley you need to visit us in the real world every so often. There is nothing wrong with having visions of heavily modified vehicles. We all have our dreams.

On the other hand, please don't ask us how to polish the platinum plating on your millenium time traveler.

Walts_restoration · 01-24-2009, 04:34 PM

Quote:

Originally Posted by special-K

You have alot to learn.I ind listening works and tellin`doesn`t.I`m getting those specs from a single turbo.Hi-pop injectors are a waste w/o increased fuel delivery and that`s not accomplished by sucking from two tanks at once...bad theory,scratch that one.
You don`t want to 5th wheel with a lifted truck.You can`t physically fit 25 gallon tanks as saddle tanks.All more fuel capacity does is give longer cruise range.Over 50 gallons requires fuel hauling permit and invites DOT to inspect you like a big truck.Something I avoid like the plague.If the switch you`re refering to on the dash is the valve controlling which tank you run off of,each fuel line will be run into the cab and under the dash.Please don`t attempt this.I highly advise against such a dangerous and impracticle plan.
As others have asked,what do you plan to do with this truck?meaning,once it`s built.What`s the intended use requiring such unusual design changes?

id listen, it makes sense. You dont wanna be illegal going down the road. Not knowing the law does not make you innocent of breaking the law.

**special-K** · 01-24-2009, 05:09 PM

Well said,N2TRUX.We`re not trying to kill your dream,Bradley,just hope to keep you grounded enough to see things through.When you announce every pipe dream you have it gets to be "the boy who cried wolf" thing.People stop listening.Think your visions through and feel free to ask.You asked about the fuel tank plan and replies let you know why it wouldn`t work as well as there is no purpose to it.But,I saw you go on to explain why you want to do it,as if it all went over your head.Just a week ago you had a thread asking questions about these trucks which showed you didn`t know much about them.It`s an excellent choice of vehicle to start with.But,let me say it`s best to get it,run it,see what it can do,and then see what you feel it lacks before planning the whole thing out.These trucks will do whatever you ask in the way of work goes.That`s why the military used them for a couple decades.

Walts_restoration · 01-25-2009, 12:11 AM

Quote:

Originally Posted by special-K

Well said,N2TRUX.We`re not trying to kill your dream,Bradley,just hope to keep you grounded enough to see things through.When you announce every pipe dream you have it gets to be "the boy who cried wolf" thing.People stop listening.Think your visions through and feel free to ask.You asked about the fuel tank plan and replies let you know why it wouldn`t work as well as there is no purpose to it.But,I saw you go on to explain why you want to do it,as if it all went over your head.Just a week ago you had a thread asking questions about these trucks which showed you didn`t know much about them.It`s an excellent choice of vehicle to start with.But,let me say it`s best to get it,run it,see what it can do,and then see what you feel it lacks before planning the whole thing out.These trucks will do whatever you ask in the way of work goes.That`s why the military used them for a couple decades.

I bet the military treats em nice compared to how i run these orignal old trucks haha. THree years of driving its let me down once, when the starter solenoid went bad. Waited five minutes started up and drive it home. My 77 went from hauling goats to being a 16 year olds first truck, which i abused and treated like a race car, won a few against some people too. Im not afriad to go anywhere in my truck.

thirdstreettito · 01-25-2009, 01:33 AM

Thanks guys. K, I understand what ya mean. You should talk to my dad...all I talk about is trucks. ALL DAY LONG. If my rich step dad were here he might get so annoyed he would give me a bunch of money to follow through with my threats.

Dooley · 01-25-2009, 02:03 AM

When I got my 1972 GMC C3500 Longbed 402 BB, it was ordered with the optional driverside-underbed 18 gal.tank. It had the under-bedside toolbox on the passenger side. Then had a steel 30 gal. tank built that took up the extra bed length up front so that when the camper was on the truck it sat just like it would have in an 8' bed. With the "in cab 22gal tank" the truck carried a total 70 gallons. In the early 70's took a trip to Alaska. There weren't gas stations on every corner back then. Heck, there weren't many corners period!

Really, never felt a need for more than 50 gal capacity since.

I have thought about mounting a 20 gal on the passenger side of my M1008 for alternate fuels. Then a valve for convenient switching to/from the diesel tank.

01-23-2009, 04:20 PM	#1
thirdstreettito Resident of Here Join Date: May 2008 Location: Wesley Chapel, FL, USA Posts: 7,716	Triple Tanks? How hard would it be to mount a saddle tank on each side and a blazer tank between the rails? I would have a panel in the dash with 3 switches 1 for each tank. And I'd like to be able to use 2 tanks at once. On an M1008(5/4t RCLB 4x4). __________________ ~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck Last edited by thirdstreettito; 01-23-2009 at 04:21 PM.

01-23-2009, 05:13 PM	#3
willett Another Day, Another Dollar Join Date: Nov 2008 Location: North Vancouver, BC Posts: 1,316	Re: Triple Tanks? fuel cell? __________________ -78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"

01-23-2009, 05:29 PM	#5
1969K10 Senior Member Join Date: Jul 2004 Location: Clarks Hill, Indiana Posts: 733	Re: Triple Tanks? I've got an old floor switch from a LWB that had 3 tanks. You just selected 1 tank at a time... The best way I would think of doing what you're talking about, would be to "T" connect the drain portion of the tanks, and add a "T" for an air line that connected the tanks. Then just run 1 line up to the fule pump. Would also allow for a return line to 1 of the tanks, since really they'd all be connected. __________________ 1969 K10 - V8, 465, 205, 12 bolt, D44 2002-current 1969 K20 - V8, 465, 221, Eaton, D44 2012-current Nothin' but drums on all 4 corners! past horses in the stable 72 C10-short step (97-02), 68 C10-long fleet (06-12)

01-23-2009, 06:41 PM	#6
James McClure One shot, one kill. Join Date: Dec 2007 Location: Saratoga Springs NY Posts: 859	Re: Triple Tanks? If you go and run both stock tanks with the blazer tank seperately you'll run into trouble filling them as fuel will siphon from the tank your filling to the empty one. Also, if the full level in all 3 tanks is different your going to leak fuel until all 3 tanks are the same. If you run 3 tanks use them 1 at a time. Also if you punch a hole in one or spring a leak you won't loose all your fuel, only part of it. I can run from Albany NY to the IN OHio border on 2 tanks (23 gallons each) You need more? Put a 275Gallon fuel oil tank back there, LOLL. Jim __________________ 1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shotJim or Paladin whichever you choose.

01-23-2009, 09:44 PM	#8
Pyrotechnic Registered User Join Date: Feb 2007 Location: Austin, TX Posts: 3,930	Re: Triple Tanks? Well if it's a long bed, you can fit a Suburban tank. Something like 40 gallons. Also, if you need extra fuel flow, don't use two tanks at once. Modify the sending units to have 1/2 inch pickup tubes, then run 1/2 inch fuel line or -8 AN line to the pump. Some manual valves would be best for this application, as no stock selector valve has that big of a fitting or can flow that much fuel. __________________ 1977 GMC Sierra Grande Last edited by Pyrotechnic; 01-23-2009 at 09:47 PM.

01-24-2009, 04:46 AM	#14
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: Triple Tanks? Gonna enter a cannonball kinda run and don't want to stop for gas?

01-24-2009, 11:54 AM	#16
thirdstreettito Resident of Here Join Date: May 2008 Location: Wesley Chapel, FL, USA Posts: 7,716	Re: Triple Tanks? Well. I'll tell ya. I'll be getting it in the next 2 weeks, so no pics yet. Plans (Always changing): 6.2L Diesel Banks kit with bigger turbo and 4" exhaust Twin turbo eventually Stage 3 methanol injection Huge injectors More...about 300HP/500ftlbs when finished NV5600 6-speed/Twin stick NP205 4:10:1 Gears, locker out back 2"-6" lift 32"-36" tires(depending on lift) Class 5 hitch Hidden gooseneck Firestone helper bags Custom front/rear tube bumpers w/ winches And more and more __________________ ~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck

01-24-2009, 12:17 PM	#17
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,859	Re: Triple Tanks? You have alot to learn.I ind listening works and tellin`doesn`t.I`m getting those specs from a single turbo.Hi-pop injectors are a waste w/o increased fuel delivery and that`s not accomplished by sucking from two tanks at once...bad theory,scratch that one. You don`t want to 5th wheel with a lifted truck.You can`t physically fit 25 gallon tanks as saddle tanks.All more fuel capacity does is give longer cruise range.Over 50 gallons requires fuel hauling permit and invites DOT to inspect you like a big truck.Something I avoid like the plague.If the switch you`re refering to on the dash is the valve controlling which tank you run off of,each fuel line will be run into the cab and under the dash.Please don`t attempt this.I highly advise against such a dangerous and impracticle plan. As others have asked,what do you plan to do with this truck?meaning,once it`s built.What`s the intended use requiring such unusual design changes? __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ Last edited by special-K; 01-24-2009 at 12:22 PM.

01-24-2009, 02:27 PM	#18
thirdstreettito Resident of Here Join Date: May 2008 Location: Wesley Chapel, FL, USA Posts: 7,716	Re: Triple Tanks? It would be my DD and farm/hauling truck. Basically I want it to be able to do anything I need it to do. __________________ ~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck

01-24-2009, 04:19 PM	#19
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Re: Triple Tanks? Bradley you need to visit us in the real world every so often. There is nothing wrong with having visions of heavily modified vehicles. We all have our dreams. On the other hand, please don't ask us how to polish the platinum plating on your millenium time traveler. __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

01-24-2009, 05:09 PM	#21
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,859	Re: Triple Tanks? Well said,N2TRUX.We`re not trying to kill your dream,Bradley,just hope to keep you grounded enough to see things through.When you announce every pipe dream you have it gets to be "the boy who cried wolf" thing.People stop listening.Think your visions through and feel free to ask.You asked about the fuel tank plan and replies let you know why it wouldn`t work as well as there is no purpose to it.But,I saw you go on to explain why you want to do it,as if it all went over your head.Just a week ago you had a thread asking questions about these trucks which showed you didn`t know much about them.It`s an excellent choice of vehicle to start with.But,let me say it`s best to get it,run it,see what it can do,and then see what you feel it lacks before planning the whole thing out.These trucks will do whatever you ask in the way of work goes.That`s why the military used them for a couple decades. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ Last edited by special-K; 01-24-2009 at 11:45 PM.

01-25-2009, 01:33 AM	#23
thirdstreettito Resident of Here Join Date: May 2008 Location: Wesley Chapel, FL, USA Posts: 7,716	Re: Triple Tanks? Thanks guys. K, I understand what ya mean. You should talk to my dad...all I talk about is trucks. ALL DAY LONG. If my rich step dad were here he might get so annoyed he would give me a bunch of money to follow through with my threats. __________________ ~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck

01-25-2009, 02:03 AM	#24
Dooley Registered User Join Date: Mar 2005 Location: North Coast Posts: 1,012	Re: Triple Tanks? When I got my 1972 GMC C3500 Longbed 402 BB, it was ordered with the optional driverside-underbed 18 gal.tank. It had the under-bedside toolbox on the passenger side. Then had a steel 30 gal. tank built that took up the extra bed length up front so that when the camper was on the truck it sat just like it would have in an 8' bed. With the "in cab 22gal tank" the truck carried a total 70 gallons. In the early 70's took a trip to Alaska. There weren't gas stations on every corner back then. Heck, there weren't many corners period! Really, never felt a need for more than 50 gal capacity since. I have thought about mounting a 20 gal on the passenger side of my M1008 for alternate fuels. Then a valve for convenient switching to/from the diesel tank.



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