Fitting to get return line connected to tank

[unclewill]

FiTech offers a "fuel command center" portable retrofit:
http://fitechefi.com/products/40003/

[cammerfe]

I'm told that putting the return in close proximity to the pick-up, (such as is found with an add-on sump or is common with fuel cells that provide two fittings side-by-side,) offers a high possibility of creating a swirl in the fuel---such as is found in a toilet bowl. THIS IS NOT DESIRABLE.

With a pressurized return, such is found with EFI, the 'head' is not as critical as it is with carburation. In a carbureted lay-out, the head will cause fluctuations in fuel pressure and is considered a 'no-no'. The Holley guys suggested an 'above the fuel' position for the return line. Holley EFI has the pressure regulator built into the throttle body and set at the factory. Although it is field-adjustable, a 'head' will, to some degree, interfere with the factory setting.

My methanol fuel cell has one of the side-by-side fittings capped. The return goes into the top of the cell where the return fuel goes directly into the foam and velocity and potential aeration are thereby dissipated.

KS

[jayb]

FWIW, the Aeromotive fuel tank sumps that have the inlet and outlet positioned together at the back, also have a baffle between them in the sump, to prevent the swirl condition that you described.

[unclewill]

I'll find out next week when I install my FiTech EFI and fuel command center on my 482 side oiler:
https://www.youtube.com/watch?v=CQWsajaNjaQ

[Bolted to Floor]

I missed some of the responses. For now, the car will have a mechanical pump feeding the carburetor. At least the return line will help with heat soak and a vapor lock issues. In the future, I want to add a EFI and I'll get there someday.

I don't know if the fuel command center will ever be an option for me. I'm not wild about the idea of having a small gas can under the hood of the car with a vapor line coming off of it. Having air conditioning and power steering on this car doesn't leave much real estate for it either.

I dug around and found a video somebody posted to the site that shows the aeration in the tank from the return line coming in simulated in a pan. I never realized there was that much of an issue with it. The return line was spewing fuel like a water hose.

For now the pick-up and return fitting will have some distance between them. I don't think the mechanical pump would put that much fuel back into the tank to cause a bunch of aeration issues, but that's me taking a WAG.

By the time I get around to fuel injection, I may wind up with a completely different tank altogether.