So I'm working on getting fuel from the tank to the Holley Sniper sitting on the intake. I have the Holley in-tank pump/sender unit which terminates with a 3/8" hose barb. I have injection-rated 3/8" rubber fuel hose. I want to adapt the fuel hose to a hard line (3/8" aluminum tube) which runs from the rear of the car to the engine compartment.
Can someone link to a product which will accomplish this? I have searched high and low and bought a few things that don't do what I want it to do.
AFAIK, I need a male-threaded part that will slip onto the hard line, a compression sleeve, and a female threaded part that terminates in a 3/8" hose barb. Does such thing not exist? Am I doing this wrong?
Vehicle is 1966 Chevy II project.
If you are fine connecting to the hard line with soft line, I think you need a bubble flare type tool to prep the aluminum tube to take soft line directly.
i mean, yeah, that would work.... I figured as soft as the aluminum tubing is, I wanted something more substantial to clamp the hose to, like an extruded fitting. Can't believe they don't make something for this purpose.
Probably because it's easier to just clamp the hose on to the aluminum.
That said, I would not use aluminum hardline. Someone was telling me he had carb problems because modern fuel was oxidizing it, or something, and filling the carb with junk. He switched to steel line and problems were gone.
X2 on not using aluminum hard tube. There's a risk of cracking from work hardening due to vibration.
What pressure is your fuel system running at?
In reply to bgkast :
I'm ballparking 60psi. It's a Holley Sniper EFI system.
Edit: Decision to go aluminum hard line was made back when we were thinking carburetor.
Might be a good time to re-think.
I didn't want to run braided flexible line the whole way, but maybe that's the way to go?
I would look at something like this: https://www.summitracing.com/parts/ear-at165006erl?seid=srese1&gclid=CjwKCAjw5c6LBhBdEiwAP9ejG4_gdN9ZespRIYWLbdgs_c3WHhOUdTjI6g7avu4WaUCIl7FIyes-ORoCTPoQAvD_BwE
For hard lines I'd look at using copper-nickel alloy, often call NiCopp. It's used for brake lines so it can easily handle the pressure of a fuel system. It's corrosion resistant, and easy to bend and flare. You should be able to get it at your local auto parts store, or online from Summit, Jegs, or Amazon. Here's one source for 3/8" tube: https://www.amazon.com/Roll-Copper-Nickel-Fuel-Transmission/dp/B015YGREXU
I will chime in to second stuart in mn's comment about NiCop hard line. NAPA stocks it from 3/16 to 3/8 diameter. Does not get eaten away like some alloys of aluminum, easy to bend, and even re-bend. I use it every time I need to put a line in a customer car.
on the locost I used sticks of 5/16 brake line from the local auto parts store and flare to barb adapters to get to the fuel injection hoses at each end.
https://www.amazon.com/LTWFITTING-Brass-Fitting-Female-Swivel/dp/B01LX77XD2
I used aluminum on SanFord because of no pressure, only suction from the mechanical pump.
On the B210 I used Nylon EFI tubing and quick connect fittings. I was very happy with how it worked.
This kit.
Nicop ftw. For all the reasons listed above
Thank you! I count you all among my many blessings.
I personally do not like the nicop stuff because it is TOO flexible, it sags under its own weight a lot of times. Makes making nicely routed lines difficult. This is admittedly more of a problem with 3/16 than anything. I'm okay with the 3/8 but for smaller stuff I prefer the greenish plastic coated line, it is a nice middle ground between holding its shape and ease of working with.
It's great for slapdash "connect this end to that end and shrug in the middle" quickie line replacement, but i have high standards sometimes
1988RedT2 said:
In reply to bgkast :
I didn't want to run braided flexible line the whole way, but maybe that's the way to go?
Some people do, but I advise against it. Not only is it expensive, but it's not the right application. Too much risk of a clamp coming undone and having a sagging line ready to be crushed, ripped, etc.
The secret for hard-t0-soft and vice versa is AN fittings. Problem is, they are picky about what hose they fit on. 60 psi can do a barb or bubble, but it does have the risk of blowing off.
There are zillions of AN fittings out there. Some will require a 37 degree flaring tool, others are complete units that use a compression-type fitting on the hard line. Soft line you might have to get the proprietary hose to fit the AN, but you only need about 6' of it; 3 ft for tank to hard line and 3 ft to go from the hard line to the engine.