how to make a fuel vapor return line chevelle GM

i added a fuel vapor return line to my 70 chevelle

just an idea on how to do it

just temporary lines until i redo my car again in the future............
the fuel and vapor return were both ripped out of the car when i got it........... the new lines are $200 and this should get me by for now....cost for both lines was around $70

[stuckinmygarage]

Thanks!! I used vasoline after straightening the copper tube and shoved it all the way through the plastic with out cutting. Then, I put a 5/16 brass nipple off the fill pipe, connecting the copper line to it with 6" rubber fuel hose. Your idea of the plastic protection! ☺👍👏

[livnstrong]

Hi Chris, thanks for always making great videos with tips! I have a 69 Chevelle with two vent lines on the tank. One is 5/16 & the other is 3/8 which will fit the 1/4" copper line. However, they don't make a vented gas cap for my year of Chevelle. Is it safe to just use the smaller line for the copper vapor return and leave the other line vented or should I plug the end as you did on yours? Thanks.

[GatorOverland]

Hey Chris i hope your not too smoked out by ITC. I have a 69 chevelle with a 454 transplant in it and have been having vapor lock issues. After some reading, a common remedy is to convert to electric fuel pump near the tank, which would aid in pre priming for easier starting as well decreasing the tendencies of vapor lock after the engine is warm. Currently i have my main line from tank running deadhead up to a (non return/bypass) holley fuel pressure regulator that is mounted to the passenger fenderwell (one inlet @ bottom, left outlet goes to fuel press. gauge, right outlet goes to carb). Im thinking of running a return line and came across many options in my research. if you reply, for simple answering, would you mind copying my 4 questions into your reply with your answers after them?
1) With your method, are you running any type of restriction orifice in the return line (ive read .060 orifice is ideal to keep consistent fuel pressure) or is it 1/4" restriction free all the way back to tank?

2) Is there anything on the other side of your tank nipple that directs the flow toward the bottom of the tank? i have read that not directing fuel to the bottom could cause agitation/splashing and build excess vapor pressure in the tank. Is this why you have a vapor releasing cap? do you have the cap part no.? delco OEM 3931449 or similar?



As you can see, im kinda scattered on which way to go, return port filter? orifice restriction? running to inline tee by tank? running to tank vent?...sorry for taking up your time with this detailed write up, but you usually have a good straight up answer and asking these things could help out many others with the same questions. i would like to know if you agree all would work and what your take is.

[kevinjustice]

hey brother great how-to! I am running a 600 cfm edlebrock with a spectra electric fuel pump through a holly return style regulator on a 1985 chevy caprice with a 5.7 vortec. I have the return port capped off. I was wondering if I could use rubber fuel line for return instead of copper?

[dannyesquivel]

Hey Chris I’m on 6080 and Paul had a bar that goes inside behind the backseat is that necessary to put on or can I just put a Viper my vapor of filter

[dannyesquivel]

So if you don’t have that Vapor holes Will you make it smell like gas on the 68 impala

[WesternReloader]

My 1980 Bronco came with 1/4” vapor line and I just bought a new charcoal canister but I’m unsure if I need a vacuum line to pull through it

[chriscraft]

this video is about HEAT SOAK and percolation remedies.. THIS IS NOT A FUEL INJECTION RETURN or a VAPOR FUME powered video.. notice CHEVELLE GM in the title..

[fonzem]

Turn up the music😎 I'm digging it!

[akp]

Chris, thank you for clearing that up...
I bought a FiTech EFI 30004... maybe I'll go back and buy the Fuel Command Center or the Edelbrock Fuel Sump.

[contam_gaming]

I have a 72 Cutlass supreme 350 and i’m trying to figure out what fuel pump because i have gotten rid of the charcoal canister. what pump do i need in order to have the vapor line and fuel line run to the pump

[akp]

Hey Chris, thanks for posting videos...
I have a 72 Chevelle SS.
Currently it has a carburetor on it but I just purchased a EFI system.
Can I use this procedure from your video to create a fuel return line using that vapor nipple on the gas tank?

[jamesgiguere]

Here is a question: Does the height of the fuel line you run, in relation to the tank and fuel pump, mater? To save hassle I'd like to run my new lines over the inner fender to the mechanical fuel pump in my 73 Torino. This rout will bring them over the height of the fuel pump. and back down to it. Does that even matter? Please help.

[seantire]

Hey bud I need help how could I do this but I installed a ms gasket electric fuel pump who could I hook up a return

[jonathangilbert]

Seeing this video for the first time on 01-11-2018. If you already have an evap. line coming up from the gas tank to a carbon canister, it seems that you could have tied into it as your return line back to the tank instead of going to the work of routing a new line.

[douglasdailey]

Pretty good idea, I wonder if dodge has a fuel pump with a return fitting on it, going to check that one out .

[Blackson]

What's up Chris those 3 return metal stems you showed on that tank. I have a 71 Chevy Impala gas tank and it only has two one of them broke off can I get that fixed

[orionscutlass]

Is it true that copper messes with gas

[rogerbelcher]

On a 69 chevelle I want to know if I can use one of the vent nipples for a return and use a vented gas cap. This is a carburated application with electric fuel pump with fuel regulator with bypass

[redlinekilla]

I have a 04 mustang do it goes the same way for an electronic fuel pump