Thread: Figuring out fuel line size?

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If I stayed with electric pump idea, which ones are good then?

I'm not making the power you are but I have a cell in the trunk and a smaller holley up front. I bought the 3/8 kit from summit, pump filter,regulator, braided line and most fittings. It has worked out great for me and was an easy install. I'd call em, I bet they have a kit for your needs.

I quite like the Mallory pumps and the Aeromotive are excellent too

They have a kit, but it is with the braided line which isn't a problem other than it being more money. but I wonder if they could mix and match a kit together for me. I have to go out there and look, make sure my flare kit goes 1/2"

Red I ran aluminum fuel line along the driverside frame rail, and used rubber clamps about every foot to keep it from moving around, then a flexible rubber fuel line to the mechanical fuel pump, on one end, and a flexible line to the fuel cell under the bed. For the pressure issues for my Edelbrock 750cfm, I went with what the carb was rated for, which was also what the stock mechanical fuel pumps are for my engine. It just eliminated a lot of issues and seemed the cheapest solution at the time. Down the line I will convert to braided stainless lines instead of rubber, but for now rubber will do.
If you start using AN fittings prepare to learn a new language and get frustrating figuring out all the fittings you need. It will work great and look great when your done, but is a bit of an expense and learning curve if you haven't used them before.
I also like what Don said about using a flex hose when going through frame members or places abrasion could occur. It reminded me to do the same where my line goes through the under cab brake mount on the frame of my 48 F1.

I like Carter pumps the fuel cools the motor I've never had any problems. I did have a Holley red on a true street car did around 30 000 miles a year for about 4 years. I have seen blue pumps die doing the same thing. Because they were to big and had to much load for too long. You have to ask your self what the real purpose of the car is. If you are going to run Nitrous you could use a Holley mechanical pump for the carb with 3/8 line and then get a holley blue for the nitrous also with 3/8 line.
Cheers Manky well that's my 2 cents.

I have used all of them, braided is my first choice, but not necessary. I agree with Jerry. The problem if there would be one is where it is closest to the fuel pump because of the vibration. I would use a block mounted pump. The good ones can change there orientation for inlets and outlets. My 2 cents.
Ken

You know what, looking athte wiring diagrams and such for electrical pump, you guys have me leaning hard for the mechanical.

Can somebody tell me how to figure the size and pressure of the pump I need? I see that many are fixed pressure, so I could just figure out what the carb needs. It's an edelbrock 750 but I don't know the model yet. I used a pressure regulator on the 429 just to be sure.

do I need more than the 40 micron filter? you guys use just one or two necessary? I appreciate all the help gentleman. I'm putting all this stuff on my wish list at summit and will move to shopping cart when car is here and I'm sure I don't need anything else.

last question (for now) return line? didn't use a return on the 429, it's between 400 and 500 hp. don't know if I need it on this one.

Red

Originally Posted by stovens

If you start using AN fittings prepare to learn a new language and get frustrating figuring out all the fittings you need. It will work great and look great when your done, but is a bit of an expense and learning curve if you haven't used them before.
.

I definatly agree there. and where I live I have order all of my fittings. also get the 40$ cutters if you go braided, I tried all the " methods" of cutting that crap then I just bought the clippers and was amazed how well they work. even though it costs more, I definatly would do all braided if I had to do it over

The hi pressure, hi volume capabilities of the new mechanical pumps are super!!! I've been real pleased with the Edelbrock mechanical pumps with the regulators and a return circuit! Not sure what might be best for a BBC, but I do know the Edelbrock has a bottom plate with the fittings going straight down if line positioning is a concern... Wish I had one setup on a car currently here so I could put up a picture or two, but nothing here quite to that stage just yet.... Back to the filter discussion, I'd suggest a canister type back by the tank, with an open enough micron count that the pump can pull the full through it, then the final filter in the line between the pump and the carb with some finer filtration... Oh yeah, best to include a shut off vavlve between the tank and the canister filter to make servicing it a bit less of a hassle!

very good idea dave! I hadn't thought of a valve. reminds me I need to come up with something on the other project too.

so you do run a return? does it need to be 1/2 as well or can be smaller line?

Originally Posted by Dago Red

very good idea dave! I hadn't thought of a valve. reminds me I need to come up with something on the other project too.

so you do run a return? does it need to be 1/2 as well or can be smaller line?

Normally a return is smaller, 3/8" will work fine on the return line.

Originally Posted by Dago Red

You know what, looking athte wiring diagrams and such for electrical pump, you guys have me leaning hard for the mechanical.

Can somebody tell me how to figure the size and pressure of the pump I need? I see that many are fixed pressure, so I could just figure out what the carb needs. It's an edelbrock 750 but I don't know the model yet. I used a pressure regulator on the 429 just to be sure.

do I need more than the 40 micron filter? you guys use just one or two necessary? I appreciate all the help gentleman. I'm putting all this stuff on my wish list at summit and will move to shopping cart when car is here and I'm sure I don't need anything else.

last question (for now) return line? didn't use a return on the 429, it's between 400 and 500 hp. don't know if I need it on this one.

Red

Red
For my Edelbrock 750, 1407 model,
it states the following:
6. Do not use more than 6.5 PSI fuel pressure. Excessive fuel
pressure may cause flooding. If your fuel pressure is too high, install
an adjustable pressure regulator, such as Edelbrock #8190.
If you can find a number for the carb, go to summit and type in Edelbrock #### in the search window. For Edelbrock carbs, they provide the instruction manuals as .pdf files that you can click on, with all the correct info you'll need. the number 6. instruction I posted was pasted from the pdf for my carb.
My carb also by the way has 3/8 " ports for fuel lines, so I just stuck with that size, but like the guys here with more experience said, it depends how much juice your running (ie HP you want!)
The carb number for my edelbrock was stamped on the base in front of the carb, right next to the passenger side bolt hole to the intake. Their are two numbers there, use the first 4 digit number in your search. Hope this helps.
If you like I can take a picture which sometimes makes more sense to me!

Thannks very much, I appreciate it. I'mholding off any ordering until we get the car tuesday, then going to order like crazy and try to get stuff here before the end of the month. I want to work on it Jan 2,3 before I go back to work.

Red

Originally Posted by jerry clayton

please post the SAE stuff on the aluminum tubing!!!!

I'll do some looking. SAE charges $ for their papers and standards etc and I am not a member .................

Kitz