75 vette fuel return line what do you do with it?
Thread Starter
5th Gear
Joined: Dec 2008
Posts: 5
Likes: 0
From: fort worth tx
75 vette fuel return line what do you do with it?
I have a 75 vette with a modified 350. I haven't restored a car since I was in high school and I am a little out of practice. My vette has a return fuel line in it. When I put in the new motor my fuel pump doesn't have an inlet for a return, just the fuel in and onto the carb. I figured that I have never done a car with a return on it so if I dont hook it up I just won't return fuel to the tank. I just ran it like I always have. When I started the car, no problems. I got in a drove it around the block and smelled gas. Popped the hood and gas is pouring out of the return line. What do I do with the line? Cap it? Hook it in somewhere else? Help..
Melting Slicks
Joined: Jan 2003
Posts: 2,713
Likes: 31
From: Shreveport LA
LA Events Coordinator
I have the same set up as you....the Holley fuel pump only has 1 inlet and 1 outlet set up. I plugged my return line and use a vented gas cap. Haven't had any problems with gas smells or leaks and it's been over 5 years.
I'm not sure, but I think the return line runs to the top of the gas tank...don't know why you're getting gas pouring out of it...unless the tank was full and some of the gas sloshed around and exited the return line when you drove it..
Hope this helps...Good Luck!
I'm not sure, but I think the return line runs to the top of the gas tank...don't know why you're getting gas pouring out of it...unless the tank was full and some of the gas sloshed around and exited the return line when you drove it..
Hope this helps...Good Luck!
Thread Starter
5th Gear
Joined: Dec 2008
Posts: 5
Likes: 0
From: fort worth tx
How did you plug the line and where? I think that I could just use a small hose to connect to the end of the line by the fuel pump and put a bolt in it. That would look a little rigged up though. How did you cap yours?
Thread Starter
5th Gear
Joined: Dec 2008
Posts: 5
Likes: 0
From: fort worth tx
The guy that built my motor said that a stock pump wouldn't be enough and I needed about 110gpm. Does anyone make a correct stock replacement that flows more? Thanks for the help!
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
Take the bubba pump off and get a refund.
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Melting Slicks
Joined: Jan 2003
Posts: 2,713
Likes: 31
From: Shreveport LA
LA Events Coordinator
I plugged it by 1) finding the least visible location and cut the hose (it was close to the vapor canister 2) inserted a black bolt that was a little larger that the i.d. of the hose 3) tighten it with a hose clamp....looks very professional and not "Bubba'd"
Mine is both a driver and show car, so I'm real particular about the looks as well as the functionality of the repair.
Good Luck!
Mine is both a driver and show car, so I'm real particular about the looks as well as the functionality of the repair.
Good Luck!
Race Director
Joined: Jul 2001
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Melting Slicks
Joined: Mar 2005
Posts: 2,838
Likes: 10
From: Austin TX
The fuel return line has nothing to do with venting. Venting is the duty of the EVAP system which has lines that run on the driver's side of the frame.
The return line was used to keep fuel from overheating and vapor-locking. By looping cool fuel to and from the fuel tank, the fuel never had time to vaporize.
Since the return line (and fuel) are below the tank, fuel can find it's way down the line causing a leak if it's not attached to the pump.
I'd find the correct pump. Besides, cooler fuel could add a pony or two.
But if you're set on the performance pump,..instead of using a cut piece of hose and a bolt to block it off, find a 1/4" rubber cap and block it at the tank.
The return line was used to keep fuel from overheating and vapor-locking. By looping cool fuel to and from the fuel tank, the fuel never had time to vaporize.
Since the return line (and fuel) are below the tank, fuel can find it's way down the line causing a leak if it's not attached to the pump.
I'd find the correct pump. Besides, cooler fuel could add a pony or two.
But if you're set on the performance pump,..instead of using a cut piece of hose and a bolt to block it off, find a 1/4" rubber cap and block it at the tank.
Melting Slicks
Joined: Jan 2003
Posts: 2,713
Likes: 31
From: Shreveport LA
LA Events Coordinator
