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  #1  
Old 06-23-2010, 09:41 AM
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rover67 rover67 is offline
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Default In Tank EFI Pump Kit

Has anybody used something like this to make a regular tank an in tank pump tank?

http://www.tanksinc.com/index.cfm/pa...prod/prd84.htm

My fuel tank has a 5/16" hard line coming out of it that I am beginning to think restricts flow too much and causes the early death of my inline fuel pump. It is always sounding like it is cavitating.

any other suggestions to convert to in tank?

I have the LRA 40 Gallon fuel tank from MAF by the way.
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Old 06-23-2010, 11:47 AM
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Interesting idea. I just made my own tank from scratch. Your inline pumps fail because they overheat. I've never seen one last more than a few months. There's a good reason why all new cars come with in-tank pumps.

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Old 06-23-2010, 11:51 AM
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Are you sure you don't have a restriction in the tank pick up unit? Could be something blocking the screen on the picku p or if it is flexible it could be kinked. A 5/16 hard line should otherwise be big enough to not create cavitation due to lack of flow.
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Old 06-23-2010, 12:30 PM
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I think most folks plumb the supply line to be 3/8" I know that when I shut the motor down it drains back into the tank and requires the pump to reprime each time.

I at first thought that there was indeed something in the tank restricting flow, but I have visually checked that it is clean since then. At first I was getting garbage out of it but now it's clean.

yeah, the external inline pump really get's hot sometimes, and after running it for a while it get's louder. I was also thinking about going this route:


http://www.vetteworksonline.com/cata...19eceefadd89f1

then it'd all be "stock"
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Old 06-23-2010, 02:59 PM
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I think which ever route you go, it would be wise to baffle (around the pump) it a bit if you can. Or maybe even get a FJ62 fuel tank that is already baffled(and set up for 43 psi fuel pump in stock form). This will keep a bit of fuel around the pump when you are on angles. This would create more work for you Marco, but in the end you would have less problems when you are pulling angles with lower fuel levels.
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Old 06-23-2010, 03:02 PM
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I tried to delete my last message. Is the LRA tank baffled around the area where you would stick the fuel pump? If not, it would be a good thing to create one.
Are you going to need to cut it for the new fuel pump or would it be a plug and play?
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Old 06-23-2010, 03:12 PM
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Quote:
Originally Posted by powderpig View Post
I tried to delete my last message. Is the LRA tank baffled around the area where you would stick the fuel pump? If not, it would be a good thing to create one.
Are you going to need to cut it for the new fuel pump or would it be a plug and play?
The LRA tank is baffled quite a bit. the fuel takes a long time to slosh around in it. I am going to have to cut a hole in it to install anything I choose to use though since it only has a hole for the fuel level sender.

Right now the pickup goes to the sump which is built into the tank, I will loose that when I install the in tank pump.

i found a AC Delco Pump assembly new for a silverado on Ebay that i am going to pick up if it dosen't get too expensive, it seems to be the most reasonable "stock" way to go.
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Old 06-23-2010, 07:03 PM
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Careful cutting on that tank. The old shade tree mechanic's trick that I always use is to run an exhaust line into the tank till all oxygen is purged. Last time I did this I ran a line from my ATV and let the engine run for a half hour. No drama after that. If you are a welder and have an argon or CO2 setup that will work too.
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Old 06-23-2010, 07:31 PM
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yeah, I was going to drain it and wash it out with soap and water till it was spotless, then probably leave it almost all the way full with water and purge the rest with argon while welding/cutting/drilling. I have used the exhaust trick before as well.
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Old 06-24-2010, 11:50 AM
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Marco, my FJ40 had a Ford external fuel pump on it connected to my Holley Pro Injection way back when. The pump never overheated or had to be replaced while I ran that system. I'm sorry I don't have more specs on it but might be a solution rather than cutting the tank.
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