'71 Camaro with a LS2 - LS1TECH



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'71 Camaro with a LS2

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Old 02-01-2009, 07:25 PM   #1
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Default '71 Camaro with a LS2

I am trying to build a fuel system that will support 600hp plus. I want to use my stock tank with external pumps and was wondering if this arrangement will work?

From the stock 3/8 pickup use a 'T' fitting, one side goes to the 'in' side of the pump, the other side goes to the 'out' side of my pressure regulator. I also want to know what the pros and cons are between using 2 pumps inline (hooked up in series) or 2 pumps into a 'Y' fitting ( hooked up in parallel )

I'd also like to know if I can use one pump as my primary pump, and have the second one triggered by a pressure switch.

I allready have a pair of Walbro 255 hp pumps, (for external mounting) and am running 1/2 inch fuel line to the fuel rail, and 3/8 fuel line back to the 'T' for the return line.
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Old 02-01-2009, 08:26 PM   #2
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Are you saying your going to tee the return into the feed at the top of the tank at the pick-up?

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Old 02-01-2009, 09:35 PM   #3
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That's the theory, yes. I believe that is the same as using a corvette style fuel filter (the one that incorporates a regulator) There is only 1 line coming out of the tank, other than the 'vent' lines, if I return it to one of those the fuel would be going into the tank like pee in a bucket...

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Old 02-01-2009, 10:50 PM   #4
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pics of said setup and car would be awesome,since i am doing something similar in the next few months on my 72 ss
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Old 02-02-2009, 12:44 AM   #5
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excuse my artwork, but I think it gets the thought across.
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'71 Camaro with a LS2-web-tank.jpg   '71 Camaro with a LS2-web-pumps.jpg   '71 Camaro with a LS2-web-fuel-system.jpg  
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Old 02-05-2009, 09:27 PM   #6
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If you do it this way, use a one way valve in the return line to keep fuel from flowing into it. Also, here's some info from Kinsler on fuel tanks and fuel injection.

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1971, 1972, 71, camaro, efi, external, fuel, gas, injected, injection, lines, ls2, ls3, pump, system, tank, venting

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