Quote:
Originally Posted by Captainfab
Automotive hardline for plumbing fuel and brakes, is measured on the OD. So 3/8" hardline is 3/8" on the outside.
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Yup.
Tubing is measured on the outside, while hose is measured on the inside.
Therefore, 3/8" fuel HOSE will slip over top of a 3/8" fuel TUBE, and can be secured with a worm-type gear clamp (assuming this is not a high pressure system for fuel injection of some sort).
I also agree that a 1/2" line would help ensure you don't suffer fuel starvation, especially if you plan any drag racing with it.