Calling all LS1 converted trucks.

[killer71]

Hey gringoloco who's doing your computer work?

[jkade]

What are you guys doing for a gas tank???

[killer71]

Originally Posted by jkade

What are you guys doing for a gas tank???

I used fuelcellguy for the tank. He's making it now. It's 18 gal, I believe, with internal fuel pump/alumin. tank was approx. 650$

[jkade]

Anything cheaper out there than $600? I may just us my stock tank and a external pump.

[killer71]

Originally Posted by jkade

Anything cheaper out there than $600? I may just us my stock tank and a external pump.

I don't think you'll find one anything cheaper than 600 which is what fuelcell guy done it for plus 50$ for the shipping which is fair I think for the fuel pump/tank!

[shifty]

Originally Posted by jkade

Anything cheaper out there than $600? I may just us my stock tank and a external pump.

internal pump is supposed to be the better deal - gas in the tank keeps the pump cool. FCG's tank (which i also used) is a little over $300 by itself, but if you order with the internal pump and sending unit and all that other jazz, it's a little over $600. not a bad deal.

[JHART]

Originally Posted by jkade

Anything cheaper out there than $600? I may just us my stock tank and a external pump.

Not sure if thats a good idea. The stock tanks arent baffled. If you do use the stock tank i wouldnt go below 1/4 tank of gas. You dont want to end up sucking air into the fuel system.

I myself still havent decided on which tank to use. I know i want a sumped tank but dont think the budget will allow it ... lol

[kyle4381]

On my blazer,Nathan plumbed a return line into my stock tank and used an external pump $175.00.

[shifty]

Originally Posted by JHART

Not sure if thats a good idea. The stock tanks arent baffled. If you do use the stock tank i wouldnt go below 1/4 tank of gas. You dont want to end up sucking air into the fuel system.

I myself still havent decided on which tank to use. I know i want a sumped tank but dont think the budget will allow it ... lol

Someone else around here has done it on two diff't trucks and it worked fine, with minor modification.

[Hart_Rod]

Ece....

[lazybra1n]

This is the stainless tank that I ordered from Brothers to use on my long bed. I was able to specify what pump I needed and where the filler would be. But it took forever to get it (9-10 weeks!- they said the supplier had trouble getting the correct pump- really put the brakes on the whole thing!) and the quality does not look like the $1k that I spent on it. They also claim that it is an 18-20 gal tank, but it looks more like a 13-15. If it is, they'll be hearing from me! I dont reccomend getting a tank from them at all!

Also included a pic of some of the fuel plumbing...

[lazybra1n]

I used the Painless LS1 extra-length harness (#60509) and mounted it behind the seat after I relocated the tank. As long as you follow the instructions they provide and use the correct brakelight and gear selector combo switch- it works great! It also comes with a VATS bypass (mounted on top of the ECU in the pic) so thats another problem out of the way!

[Wasted Income]

My buildup thread:
http://67-72chevytrucks.com/vboard/s...=1#post2217111

[jorgensensc]

I thought there was some f#%d truck that had a tank that would fit and worked in the rear framerails?

[jkade]

I see nothing wrong with running the stock tank with a external pump. I have read of guys running ext pumps over a 100k miles and still a pumping. My dad is running one on his 66 vette with a stock tank. I myself can't afford $650 plus for a new one but thanks for all the ideas.

[shifty]

there is not a problem with it at all. internal pumps supposedly last longer because of the cooling nature of being submerged in gas.

[Wasted Income]

I think it's a wives tale about the pump lasting longer being submerged in gasoline.

The frame mounted pump has fuel running through it to "cool" it, and the thermal conductivity of the air flowing past the pump is just a bit less than that of gasoline.

Think of the heat that is being added to the fuel through pumping to the fuel rail, and back to the tank.

Given that the fuel and ambient air start at the same temp, the fuel will soon be hotter than the ambient air around the pump.

I don't buy it.

[Musclerodz]

Originally Posted by Wasted Income

I think it's a wives tale about the pump lasting longer being submerged in gasoline.

The frame mounted pump has fuel running through it to "cool" it, and the thermal conductivity of the air flowing past the pump is just a bit less than that of gasoline.

Think of the heat that is being added to the fuel through pumping to the fuel rail, and back to the tank.

Given that the fuel and ambient air start at the same temp, the fuel will soon be hotter than the ambient air around the pump.

I don't buy it.

Not BS, it happens. It is all heat disappation. With the pump in the tank, it has the cool fuel to pull the heat from the pump. It ambient air, the motor builds heat and the surrounding air will not draw the heat from the pump which causes the fuel to heat up and vaporize. Perfect example is too heat an item up in the oven and see how long it takes too cool down. Then heat it up again and run ambient temp water over it as see how fast it cools. When installing the pump in the tank, they usually install a pan at a minimum that the pump remains submerged in fuel even with a low tank. With the pump in the tank, if you run out of gas, the pump immediately regains its prime with more fuel where an inline pump down stream can be hard to prime if the tank is incorrectly plumbed.

Mike

[JHART]

Ok but what about the gas sloshing around in there when you are running low? Wouldnt that cause for some issues?

I mean i am no expert but every motor head i talk to says its better to run a baflled tank rather then not. They also say if you end up sucking air into the fuel system your in for some fun.

[jkade]

Originally Posted by JHART

Ok but what about the gas sloshing around in there when you are running low? Wouldnt that cause for some issues?

I mean i am no expert but every motor head i talk to says its better to run a baflled tank rather then not. They also say if you end up sucking air into the fuel system your in for some fun.

Don't let it get that low

[JHART]

which is why i mentioned not to let your gas go lower the 1/4 tank when running stock.

[jkade]

Originally Posted by JHART

which is why i mentioned not to let your gas go lower the 1/4 tank when running stock.

I remember you saying that now.

[Kid]

I gotta get in on this thread, Finally got around to getting a pic taken, its just a 5.3, not an LS1, oh well.
Got a few more pics of the buildup on the 47 to 54 forum
http://67-72chevytrucks.com/vboard/s...=154951&page=2

[JHART]

Originally Posted by Kid

I gotta get in on this thread, Finally got around to getting a pic taken, its just a 5.3, not an LS1, oh well.
Got a few more pics of the buildup on the 47 to 54 forum

I'm probably wrong but i thought the 5.3 is a LS1. A version of it at least. I'm prolly wrong.

[jkade]

Originally Posted by JHART

I'm probably wrong but i thought the 5.3 is a LS1. A version of it at least. I'm prolly wrong.

Basically, the bore is about the only difference and I believe ls1's are aluminum blocks.