This video makes perfect sense. Air in the system will cause all kinds of issues. Thanks for sharing your knowledge! Cheers from Motown.

Thank you for this. I'm about to install my EFI tank for my 50 Chevy Deluxe with LS1

Thanks for the part numbers man that was a huge help! Much appreciated.

Thanks very much for this tip. I will be doing this very thing this coming week. Glad I watched this. Saving me in long run from loosing my mind!! Thanks ✌️

I did the same exact thing with the efi hose ,works great

thanks for taking the time to make this important point.

Thanks for the Info, it was extremely helpful for my CJ7 Sniper EfI BBD install

@Archifx

5 жыл бұрын

Glad I can help!

Yes, a very important step. Make sure you use a hose that is submersible rated.

@otallono

2 жыл бұрын

Yup, he's just using the normal vapor guard instead of the submersible for some reason

Absolutely spectacular video! Thank you very much for this information! I have only one other idea of potential improvement. Everything in the tank by default, which the gasoline would constantly be steeped with, is pure authentic metal. I don't like the idea of a rubber hose being constantly steeped in gasoline. This might potentially cause the gasoline to become contaminated by the rubber, and cause the rubber to become deteriorated by the gasoline. The best option is to mount an authentic metal return line into the tank itself.

@Archifx

5 жыл бұрын

Great idea!!!

@spoolnpsi2606

Жыл бұрын

Totally agree

@MSIMark

4 ай бұрын

They actually make submersible fuel hose "SAE 30R10" which prevents the different layers of the hose for deteriorating when submersed in fuel.

Hey thanks man! This is what I thought was right but a friend told me it only barely had to go in the tank. He's a bit more experienced with fuel systems than I but it didn't seem right to me and you just confirmed it! I appreciate you taking the time to make the video.

After watching this I'm not sure what I should do in my situation now. I'm building a blow through turbo set up for my Sportster. I'll be running a low pressure fuel pump and boost referenced regulator. I'll have to fit my tank with a bung for a fuel return. The bung will be fitted up through the bottom of the tank. I was told to attach a down pipe to return the fuel to the top of the tank where it would be above my fuel level. The reason was to avoid the head pressure from the fuel inside the tank on the fuel being returned because of the fuel being returned upward through the bottom. Way back in the day a company the made turbo kits for these bikes used the vent tube for a return. My vent tube is only 1/8" and points directly up to the under side of my fuel cap.

Using the AN bulkhead fitting you can also just flare an aluminum line instead of the hose. Then add the proper flare nut and tighten it up...Again not easy inside the tank but doable if you position it correctly. Use a cheap lil electric fuel pump with a clear filter on it to suck up any shavings in side the tank.

Put a stranded insulated wire still connected to its spool through the holes drilled for the return line, use a grabber or bailing wire with a hook and catch it the the main opening, push the wire through the nut or vapor guard bolt, make a knot or put a stop (I used a large washer), the piece of wire that goes in the tank should, coming off the spool> through the return line im hole drilled into the tank> throughly vapor guard etc>then have the knot>ensure the vapor guard Al can’t slide passed the knot or stop and pull toward the spool, with a little finesse you should be able to do it quickly and easily! Thanks for the vid

Thanks for the info. Going to be routing a return line soon. Last but not least, is that heat shield insulation on your tank?

Thanks you for the info.

Great advise,

AWESOME LESSON

it will eat the inside of the fuel pump it is cavation from the air and in a diesel it will wreck fuel injectors and high pressure injection pump. and a hard line is best in there a hose can cause the same as not having a hose at all as it can flop around under psi changes. but any is better then none. thanks for sharing

Thanks for the video. My mid-70s Ford has a small hole for a vent valve on the top of the tank. I can’t install this type of bulkhead fitting because I can’t get my arm in there to install the bottom nut. So, if I use the FAST brand fitting that compresses on the tank wall and dumps the gas in, will that vent valve reduce the aeration? I’m sure it won’t eliminate the problem altogether. Just curious if you think it will help. Thanks.

Great tip

thank you very much

I didn’t scroll through all the comments so hopefully I am not asking same question already but could you tap and add a return hole/inlet line at the same level and close to the stock/existing exit/line on the tank?

Do you think I could do the return line into the 2nd hole on my tank sump?

Thank you!

Is there a system that allows for stock tank and intake while using an in tank electric fuel pump ? 74 k5 vapor locker.

Not car related, or carb conversion. I have a crashed motorcycle that’s already EFI, but the tank is destroyed and fuel pump. I have a inline fuel pump, and can put that down into a gas tank, with just the return line shooting in at the top. It runs fine like this, but my real question is I am just gonna have a normal fuel tank gravity feeding to the pump, with a decent size inline fuel filter. But I won’t have anywhere to put the return line, I was just going to get a T connector right after the petcock for the return, but was worried that it might be too agitated to work properly, but at the same time be fine. In the end I won’t loose anything trying.

Would aeration be an issue if you have foam in your fuel cell?

thanks alot

Do you have the install videos you spoke about in this video?

Thanks my friend. I'm planning an EFI conversion soon myself. One question. Would it also be helpful to have a a fitting and plate fitted with a strong magnet to hold the hose down to the bottom of the tank? Wondering if over time the hose with curl up.

@Archifx

4 жыл бұрын

Wouldn’t be a bad idea. Or use a metal line instead of the rubber line.

Did you connect your efi pump to the stock fuel tank pickup?

If there is room, can I drill and add the return line on top of the sender, take the sender out drill and install the fitting?

found something that really.......chaps my ass LMAO. i like that you talk about the video as if ur friends are working with you

I converted to an intank pump so I still have the sump on the bottom of my tank. Do you think I could put my return in the bottom of the tank?

Question : Can you tap into the diesel return line with a T to use for a diesel heater when the car is not running? (For 2013 ML350)

I'm looking at doing a FiTech or MSD throttle body fuel injection for my 67 Mustang. I'm looking at trying the Spectra Premium combo fuel pump/sender unit/return line (SP169C1H) and putting a 70 Mustang 22 gal gas tank. Post how you like the Sniper unit.

@Archifx

5 жыл бұрын

Haha. Thanks for the comment. I actually haven’t finished the sniper yet lol. I will be doing a video soon on it. Had so many things come up with work. I’ll be getting back to it next week.

nice video, would be cool, if you added in the complete parts list and what size drill bit did you use for the bung?

@Archifx

6 жыл бұрын

I'll get all of that up on Restorationmustang.com asap bud. Still working on it.

@alanp8724

6 жыл бұрын

awesome man!!

@otallono

2 жыл бұрын

@@Archifx years later it was never added, that's why it's best to just answer a question when it's asked -.- People very rarely do what they say they will do.

Just watched your video. Getting ready to do the same. Where did you get the fuel tank vent I see on your tank? Also good video. Thanks

@Archifx

5 жыл бұрын

Are you referring to the braided line?

@heliguy02

5 жыл бұрын

No, I was talking about the round black cap with a hose barb that you have a cap on, but now I see it is just your cap to cover the big hole in the top of the tank. I have a later model tank and this is where my sending unit and fuel lines go into my tank.

What if my FiTech system has a bung with a breather? Will that be good enough?

Wouldn’t driving the vehicle around cause the gas to slush around the same way ?

Couldn't I just weld a sump on the bottom of the factory tank

They make a bulk head fitting that will work

what if you put it into the bottom of the tank ?

Sure hope that hose is submersible. Used to be a hoseman & made hydraulic,fuel,air hoses. None of our hoses were able to be submerged in fuel. Great point about the air though. I'd use stainless steel or brass with compression fittings.

What about cutting a square in the tank find a bigger piece of metal drill and put your rig in that use some sealant self tap screws call it a day

Could you return the fuel by using the drain on the bottom of the fuel tank, i.e. 1970 mustang 16 gallon tank.

@Archifx

6 жыл бұрын

You could, however, I wouldn't because these little gaskets they provide with these AN fittings probably wouldn't hold up for a long time being constantly saturated in fuel. You'd eventually develop a weep leak

I’m removing my sniper efi. Too many problems. I’m over it

but ... if you make the return at the bottom sideways :) ?????????

Best location for a return line is the filler neck for any efi add on system.

@Archifx

Жыл бұрын

Good point. But… aeration ever an issue?

Whatever you do, do not use a rubber fuel line to do this. It will work great for a while, then as the rubber degrades it will contaminate everything in your system and start to gum things up. Use a hard line for this. He is right you don't want the waterfall effect in your tank, but do not use a rubber line, I don't care what 30R rating it is.

@awesomusmaximus3766

3 жыл бұрын

I'm getting ready to install mine but will use hard line and am adding the return to the sender unit much better solution

@Archifx

3 жыл бұрын

Incorrect. It won’t degrade any faster than metal. Think about it... the rubber lines in any car ALWAYS have fuel residing on the inner wall of the rubber line. No issues. The lines are made to stand the test of time. Don’t over think it.

@awesomusmaximus3766

3 жыл бұрын

@@Archifx It may not degrade fast but it still degrades over time

@Archifx

3 жыл бұрын

Sure. So does anything else my friend.

@awesomusmaximus3766

3 жыл бұрын

@@Archifx An unfortunate truth

Did you notice on the diagram the separation between the fuel pick-up and the return tube? Where you are mounting this return extension tube into the tank would be 3-4" away from the fuel pick-up tube. The pick-up tube would suck any air bubbles in.

@Archifx

4 жыл бұрын

The way I did this is perfect. Have over 25000 miles on the car since the video. Take my advice here not the comments section. I’ve lived thru the install

@glennstock5996

4 жыл бұрын

Thats good to hear, I may do it also.

Your stating that without the down tube it will introduce air and bubbles into the tank, my question is then when your at the gas station pumping gas into the tank there is no down tube in your filler neck, it hits the gas at a higher pressure and really sloshing around, why aren't we concerned about that as far as introducing air and bubbles into the tank.?

@Archifx

4 жыл бұрын

It’s not the initial introduction of air bubbles. Those will float to the top and go away before you leave the station. It’s the continuous production of bubbles while driving that will hinder performance. You don’t want the fuel to continuously percolating in the tank.

Hope Not to be repeating the question but can you not put the return on the underside of the tank?

@mrmotofy

Жыл бұрын

Can...but dangerous to have a hole in the bottom of your tank. Technically illegal for a car manufacturer or a commercial vehicle to have a bottom sump etc. Just bad all around

They give you the plastic hose for the return, you don’t want to use regular fuel hose inside the tank it will disintegrate over time. You must use submersible hose

@Archifx

5 жыл бұрын

Mine didn’t come with a hose

@hamreracing333

5 жыл бұрын

Maybe they changed that because I received one. Do some research on regular hose submersed. I would change that out

@Archifx

5 жыл бұрын

Hmm. Good idea for sure. I’ll check it out.

@3beltwesty

5 жыл бұрын

NAPA has "submersible hose" . This type of hose is used to connect the fuel pump to the metal tubing in cars with internal fuel pumps on sending units. www.napabeltshose.com/~/media/napa/documents/napa-submersible-hose.pdf?la=en . The PDF says it is not resistant to salt water or UV light. Also Gates and Dayco sell submersible fuel hose. It sells on Ebay for roughly 20 to 30 bucks per foot in automotive sizes. Regards

@3beltwesty

5 жыл бұрын

If the tank is already installed, the risk of using non submersible hose on the internal tank return line is probably fairly low. There is not much pressure. Its is the same as the tank at exit at the bottom of tank. One could place a small piece of non submersible hose in a jar with gasoline and find someplace to store it safely for months as a test. If the outside of the fuel line is disintegrating then you would know. ie clog up the filter if anything the hose is really coming apart.

I'm pulling my tank tonight for the same reason

I was hoping that someone may be able to help. I have a tank with a factory internal sending unit that is not in use, because I have a external pump that's connected to the welded on sump. Can I use the "return" on the old sending unit as the return? I currently have fuel set up as a dead head wanting to go with a return line and didn't know if it would work, 6AN fuel line all around only needing 7lbs of pressure. Thanks in advance.

Don't bubbles just rise and float at the surface?

@cuzz63

3 жыл бұрын

pretty much, might only be an issue if low on fuel.

I’m not sure about the “bubbles make your car drive bad” theory. What happens when you drive the car? Does it not create bubbles then?

@joeg.9536

4 жыл бұрын

The factory adds a down-tube below the fuel pickup on ALL their vehicles (with return systems). They've always done this since the advent of return lines. Even the instruction in the video tell you to do it. It's not a theory, it's what happens. You have to decrease the instances where bubbles form otherwise your tank will look like an aquarium on the inside. Aerated gasoline sloshing around, the bubbles can even be microscopic.. just like an aquarium, allowing the fish to breath. I guess if the return hole is far from the pick-up it might not affect it that much but why take your chances. The lack of proper info and half @ssed explanations is truly annoying.

@reddsm86

3 жыл бұрын

The air in the fuel will also cause horrible cavitation of the pump.

And that was the short version??!! 😳. Way to many words buddy. You need to keep it simple….😉

Why not just add a large fuel filter with a return line made into it before the fuel pump?? If not most classic cars have sending units built with return lines added. Thats what I used for my 1956 Chevy.

Just found my problem lmfao 🤣😅

I was told you don’t have to drop the tank?

@dylanhager8548

6 жыл бұрын

I got this whole master kit. I don’t want to start this project yet, cause I don’t know how the hell im going to route this return line

bung...

The video was good but you are making a huge mistake. The hose the you put into the tank MUST BE of the submersible type. If you do not do this, the fuel will eventually eat away the rubber. Standard Vapor Guard is not submersible.

Next time buy a aeromotive tank. Comes all installed for you.

@Archifx

4 жыл бұрын

They make one for a 72 mustang?

that's not why the tube is used it's so fuel doesn't run back from the feed and the fuel system is always submerged

just buy a sending unit with 2 lines for 60 bucks.smh..

@Archifx

5 жыл бұрын

Has nothing to do with a return line. Explain

Swirl pot.

What is your problem, just follow the directions provided by Holley. Are you just trying to show us how smart your are on KZread. Most of us don't have trouble following directions and clear illustrations

@Archifx

Жыл бұрын

What’s your problem? Why did you watch my video? Troll prick

You cannot - add any - fuel line! WAR'CHF' - "EXACT WRRN!" EFI - would diffuse - and burn - all around! You didn't - calibrate nothin - accord - psi - force of diameter - material! Temporized!