Im about to install a Holley "Blue" electric fuel pump on my car. Right now it has the original 5/16 metal line from the tank. Since the pump is going back by the tank, I was going to run new 6AN braided line all the way up. Is this the best way to go, or is 3/8 tubing better?

The plan is;

Tank 5/16 line -> 6AN-> 3/8NPT-> pump-> 3/8NPT-> 6AN-> 3/8NPT-> regulator-> 3/8NPT-> 6AN-> filter-> 6AN-> 3/8NPT-> carb

My friend just told me he saw a sending unit that has threaded outputs. Anyone know who makes it? This is the way I want to go, but I cant seem to get any leads on it.

Bump. Need to order parts by the weekend!

Braided line is more expensive than tube.
Why pay more for what you can't see?

The 3/8's aluminum tube is what I suggest to get it to the engine firewall.

It comes in a roll. I did the same thing with a 68 Charger last year with a 383.

But, I removed the sending unit, sold it (race car don't need it), used a bulk head fitting thru a modified sending unit and ran the 1/2" tube down into the tank.

We spent over $150 on fittings, and another $100 on hose and al. tube. But we also had a filter before the elec. fuel pump to deal with.


Even though I drew it out I still had to go back twice for female/male AN fittings.

You are on the right track, but draw it out on paper and don't forget the male/female connections.

I suggest this:

Tank hard line from sending unit is 5/16" to whatever you need to go from this hardline to->

fuel rubber hose 1" long (for the vibration)->

24" of 3/8's aluminum tube using a female 6AN compression fitting->

to pump (assuming it has 6 AN male fittings)->

female 6AN compression fitting for 3/8th's AL. tube->

6-8 feet of Aluminum tube toward front of car (they sell rubber coated loops to support the tube-I feel a street car should have some more protection on the line, like a split heater hose facing down running along the line)->

female 6AN compression fitting->

<optional-was needed for MOPAR frame>
6AN (may need male/female AN adapter) bulkhead fitting thru frame, run it through a section of 5/8th's heater hose to protect for vibration->

female (assuming you used a male/male bulkhead fitting) 6AN braid hose fitting->

10-20" (depending on where you put it) of 3/8th's braid hose->

female 6AN fitting->

regulator (may need 2 6AN-3/8th's NPT adapters)->

female 6AN hose fitting->

15-20" of 3/8th's braid hose->

female 6AN hose fitting->

filter (assuming it has 6AN male fittings->

female 6AN hose fitting->

10" of 3/8th's braid hose->

female 6AN braid hose fitting->

6AN male/male 3/8th's NPT adapter->

carb

I would use as much hard line as possible to avoid vapor leakage from the braided hose. Myself and several others here had a lot of problems with gas fumes in our garages after switching to nearly all braided line. See here:

http://www.chevelles.com/cgi-bin/forum/ultimatebb.cgi/topic/4/21326/2.html?

In November I removed all of the braided stuff from my car and.... no more fumes!

I don't have an alterantive for you as I still need to do some research to figure out if some other brands will be better.

If you find out please let me know!

Jeff
65 SS
460 ci, TH350 BTE 3000 stall
Best ET 12.57 (street tires)
Best MPH 114.08

I used 1/2 aluminum line in the frame and braided at the ends. Used the insulated clamps to hold it in the frame. Compression to AN fittings on the ends.

you need to get rid of that 5/16 pickup tube in the tank first. otherwise you might as well leave the rest of it 5/16 too. the system will never flow more that the most restrictive section and that's it. 3/8 pickups are not hard to come by, all 4-bbl V-8's had them along with all big blocks.

Tom

I actually just ordered a 3/8 sending unit, forgot to mention smile.gif

well, i have all braded line from my cell to the carb... to tell ya the truth, it's expensive VERY EXPENSIVE.... i'd just use the braded line where people will see it... i have an8 from the cell to the filter, then an8 to the fuel pumpe, and to the divider block, then from there 2 lines to the carb... and an an6 as my vent for the cell... also keep ANY WIRING AWAY FROM IT!!!!.. it will rub the coating off the wire, the spark against the steel brade and blow a hole in it!!!! that ain't good when you got fuel running thru it graemlins/clonk.gif can you tell it happened to me graemlins/thumbsup.gif lucky my car didn't go up in flames..

Do the factories use steel fuel and brake lines? If so; wonder why? Just curious.

Anybody ever use braided teflon hose? It's about 1/3 the price and looks the same on the outside. Also I doubt it would have the vapor problem like the rubber stainless hose. It's used alot for brake line, so I doubt it would have any problems with gas.

Steve