Hi gang...have not been around in a while but finally getting around to doing some work on my son's 67. We have removed the FAST EFI system installed by the PO...returning the car to as close to stock configuration as we can.
So we re-installed the mecahnical fuel pump which was still in the trunk of the car...looks like an Airtex or something...there is a 3/8 nipple for the inlet...an inverted flare fitting for the hard line to supply the carb...and a mysterious (to me) 3rd nipple or port..smaller size like 1/4"...
Can somebody tell me the purpose/function of this...where does it normally run to? ...can we just plug it off?
Return line. Runs back to the tank. If you have a 3rd inlet on the fuel sending unit back to the tank, that's where it eventually runs to. Of course you need all the lines in-between also.
If you don't have a return line on the car, it can be plugged and abandoned. Its purpose is to lessen chance of vapor lock by keeping fuel flowing thru lines and circulating at low rpms.
Ahhh...I see....there is a second smaller return tube coming from the tank/sender area....I assumed the po had added it for the EFI return line, never thought about it being factory. They had a 3/8" return hose running back and then necked down and clamped to the 1/4 hard line. I guess I'll take some time and run the proper 1/4" line back there...
So I'd really prefer to pull out both of these high pressure hoses they have running from the tank to the motor.
Did the stock configuration consist of a pair of hard tubing lines (3/8" and 1/4" ?) tied to the sub rails?
The way the lines exit the tank, it appears they need to run along the passenger side...at what point in the chassis do they "cross over" to the pump side.
And lastly...is there a source for correct length, pre-bent "factory looking" lines...or should I just make them up from generic hard line and fittings from the local auto parts store.
And lastly...is there a source for correct length, pre-bent "factory looking" lines...or should I just make them up from generic hard line and fittings from the local auto parts store.
