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Old 08-02-2009, 11:39 PM   #1
htwheelz67
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Default fuel tank sump for efi

I got a great deal on a powerjection 1 for my 408, anyone sump their tank for efi? Iwas looking at this.
http://www.summitracing.com/parts/SU...3/?image=large

I'd have to buy a 3/8 sending unit at the least and this could be a better option.
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Old 08-03-2009, 12:59 AM   #2
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FWIW, I'm using a 20-gallon tank with a single external pump and no sump and haven't had a problem.
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Old 08-03-2009, 01:29 AM   #3
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Good luck welding that on your gas tank you better let it air out for a few days.Jamesw has a inline pump on his stock tank and it runs fine for him.
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Old 08-03-2009, 07:20 AM   #4
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For an EFI installation, that sort of sump would probably benefit tremendously from having some sort of baffling added. You need to keep fuel available to the EFI pump's suction port under ALL conditions, otherwise the engine will stumble or even quit entirely. Depending on the shape of the tank, when the fuel level gets low the sump in the link is probably at its best during acceleration (probably intended that way). But not so good for cornering, and likely poor while braking since the fuel will slosh away from it.

EFI does not put up with momentary loss of fuel being delivered from its pump very well - there is no "ready reserve" of fuel like you have in a carb float bowl to cover for it (unless you build something similar to a float bowl into the system yourself, which would require a second pump to keep it filled - BTDT).


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Old 08-03-2009, 07:51 PM   #5
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That's the same sump kit I have on my car. I had it professionally tig'd and baffled. I picked up a new tank, which cost less than the sump kit.

Click the image to open in full size.
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Old 08-03-2009, 09:09 PM   #6
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Do it pretty often here with EFI conversions. Usually a new tank, sending unit seald exit so it doesn't leak and sump.
Click the image to open in full size.
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Old 08-03-2009, 10:02 PM   #7
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I'm going to try it as is, I can always sump it later....look what showed up a couple hours ago...barely used powerjection for a killer deal, I tell you those cobra guys have lots of money, the guy I bought it from used it for 2 months and decideded he wanted stacked weber style efi.....
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Old 08-07-2009, 09:48 AM   #8
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It'll work for sure. Have a customers car that has his EFI pump through the stock pickup, and return in the drain. But he doesn't have the HP you will. That's where YOU will need to be careful.More power, more G's pushing the fuel away from pickup.
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Old 08-07-2009, 04:56 PM   #9
67 evil eleanor
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Do it once. I have used that sump and had no problems except, I did run out of gas once, but it sucked "ALL" the gas out. With no sump and baffle there will be strumbles with the engine.
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Old 08-07-2009, 04:56 PM
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