Fuel pickup

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Oct 5, 2005 | 02:20 PM

#31

F. Flack

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Joined: Apr 2004

Posts: 154

Likes: 0

From: Ramsey, MN

Quote:

Originally Posted by yarddog

After thinking about it, the back of the tank is probably the best place. When you accelerate all the fuel will slosh to back of the tank, right where the outlet is.

For racing/launching, this makes sense. What I found with my new pickup tube and AirDog is that when the fuel drops below the 1/4 level and I step hard on the brakes, my fuel pressure drops below 5psi. I've seen a sump similar to what Haulin described (inverted hat) -- down side was they want $200 for it. I've been trying to think of a way to keep fuel near the pickup tube during hard stops and starts. The added bottom-feed sump sounds like the best solution. Just have to keep it above 1/2 full for now...

Here is a link to the sump I was looking at: http://www.dieselinnovations.com/ima...hims_large.jpg

Oct 5, 2005 | 05:48 PM

#32

Vulcan

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Joined: Dec 2004

Posts: 138

Likes: 0

From: Vancouver, USA

Quote:

Originally Posted by Haulin_in_Dixie

Ok,you missed completely how mine is set up. The bung pictured is backwards for sealing on these plastic tanks. The washer brazed under the head, on the inside, and the nut outside, maybe 150 ft pounds of torque, won't leak. The flat washer will be about 2 inches diameter.

Do the same thing to plug the hole if you feel the need. Just use a bolt that fits the hole, braze the washer under the head, put it through the hole and tighten it down.

Don't use gaskets on it the tank is the gasket.

Ok, I'll go mind my business, sorry if I offended anyone.

No offense taken friend, I just wanted to explain what I was doing and why. I know others have done it the way you speak of with success, I just have another idea thats all.
I still appreciate the comments, causes me to think it through a little more.

Oct 5, 2005 | 11:59 PM

#33

newriverSpecon

Registered User

Joined: May 2005

Posts: 487

Likes: 0

From: Missoula, Montana

Quote:

Originally Posted by Haulin_in_Dixie

The way to do it is a hat shaped sump that will bolt around the hat brim and has a drain on one side and an outlet on the other. You don't cut the tank out to the sump, you just drill a few holes for the fuel to get in. this covers you when the fuel leaves momentarily and provides a drain to drain off water. I used to weld these to my big truck aluminum tanks. Works great and you can literally run the tank out of fuel.

Same principle but you can't weld an aluminium structure in our tanks. A tube going across the tank with hole on the far half would give you that and be self supporting. The far end of the tube should probably be tacked down with a fuel proof substance. Not sure where general public could get some but a few companys make some really good stuff for sealing tanks and sticking stuff.

Randy