quote:Originally posted by Snoopy: Is there any reason I can't use the vent plate on the tank to fabricate a plate with a vent and fuel source using larger 1/2 tubing so I can get an adequate amount of fuel to the fuel pump and carb?
I did just that on one of the previous incarnations of my car; that is, fabbed a 1/2" diameter assembly to that installs where the stock vent cap formerly resided. It's still installed.
Here's the assembly:
I added the vent tube and you cant see it but the 90 degree -8 bulkhead fitting nut and jam nut are tacked in place. I don't recall for sure but minimum diameter though the fittings was about ~.390" though it does have an abrupt 90 degree turn in the bulkhead which is bound to cause some head loss.
Here it is installed. I left the original pick up installed because it mounted the sender and just capped off the stock fuel pick up. It supported a stroker engine that was ~500 HP at the flywheel at 6krpm. Pretty sure I installed this while the tank was out of the car. Not sure but doubt it could be done in the car.
I've since added an electric fuel pump and when I did, I went to the set up below which removes fuel directly from the bottom of the tank. The car will eventually be injected at which time I'll swap the fuel pumps for the EFI pump. There are some pro's and cons to removing the fuel at this point. Some will say that it makes you more likely to suck bad fuel though I've never really understood this. If I should ever have bad fuel, I'd want it out of there any way. I'm a firm believer in the larger cannister type filters and inlet plumbing especially to feed electric pumps so you don't run them dry. IMO, most of the small inline filters have too much pressure drop or soon will after some use. Bosswrench will caution that this extraction point is more suspectible to damage from road trash. I installed an Earl's bulkhead shut off valve, pointed most of it forward, and tied it off through the bulkhead valve to the tank support. Even so, it's well above the frame rails. Suppose I could put a trash shield on it but it's not a track car and at my ride height I'd have some serious front end damage before anything made it to the fuel line.
Take care,
Kelly