3/8 fuel line to factory carb lines

[Bill Monk]

I do not have and A12 car but I run a 440 6bbl. The car still has the original 5/16 fuel line and it needs replaced so I figure now is the time to swap it to 3/8. The question comes at tying the 3/8 line into the factory style carb lines which were all 5/16 as far as I know. How did ma mopar handle the transition? The brass blocks on the carb lines are threaded for the 5/16 line.

 

[Sixpactogo]

You need the fuel vapor separator. Mounts below the Alternator like this:

Mopar Fuel Gas Vapor Seperator Hemi 440 68-71 Cuda Charger Daytona GTX SuperBee | eBay

 

[Bill Monk]

You need the fuel vapor separator. Mounts below the Alternator like this:

Mopar Fuel Gas Vapor Seperator Hemi 440 68-71 Cuda Charger Daytona GTX SuperBee | eBay

Thanks, I found a work around in an adapter that will allow me to run a 3/8 line all the way to the first block on the carbs lines.

 

[Sixpactogo]

That is what the separator does too. 3/8" in, 3/8" out with a 5/16" return.

 

[BadBee]

Can we get a picture of that SIX PACK?
Thanks,!!

 

[Sixpactogo]

Can we get a picture of that SIX PACK?
Thanks,!!

I don't have a real good picture and some mount different as well. But, here is a pic of my 70 sixpack engine showing the separator. It mounts to the front fuel pump bolt and behind the alternator bracket. The white arrow is pointed at the 5/16" return that goes back to the tank.



Here is a pic from the front

 

[BadBee]

Thanks, where can I get one? Also is that transition at the pump to 3/8? I was going to go with
Stainless A+N fittings with an inline fuel pressure guage. Is that a '65 SATTY in the background?
I have one I'm selling (a roller with everything if you know anyone)
Thanks Again
Mitch

 

[Sixpactogo]

Thanks, where can I get one? Also is that transition at the pump to 3/8? I was going to go with
Stainless A+N fittings with an inline fuel pressure guage. Is that a '65 SATTY in the background?
I have one I'm selling (a roller with everything if you know anyone)
Thanks Again
Mitch

Mitch, I just looked on Ebay. Vansautollc has one for $38.00. I know I paid twice that for mine back in 99. Punch in "B body 440 fuel separator" and a few of them come up.
They are 3/8" in and 3/8" out with a 5/16" return. There is no filter in them so you still need a filter. I put my inline 3/8" filter between the fuel line and the pump but I suppose you could put it above the separator if you want.
The black car is a 65 Sport Fury conv.

 

[BadBee]

Ok sounds great thanks, BTW did you put fuel filter in before pump or after pump? As I have one in already but that will be relocated!
Thanks for the HELP
Mitch

 

[Sixpactogo]

Ok sounds great thanks, BTW did you put fuel filter in before pump or after pump? As I have one in already but that will be relocated!
Thanks for the HELP
Mitch

3" before the pump. That way you don't have to cut into the metal lines.

 

[68 HEMI GTS]

If it's not a factory correct deal I really like the promax set up. 3/8's braided. Very easy for carb tunning

 

[lewtot184]

That is what the separator does too. 3/8" in, 3/8" out with a 5/16" return.

the separator is 5/16" in and out with a 1/4'" return hose.

 

[lewtot184]

make your own.

 

[BadBee]

Nice LEW! I have the original Direct Connection as in the above photo as that is my six pack,
I like the A+N with the braided stainless I was also going to install an in line pressure guage?
LEW is it advantageous to go to 3/8?
Thanks LEW + Six Pack BTW my fuel lines are on the same side as the linkage.
Mitch

 

[Sixpactogo]

my fuel lines are on the same side as the linkage.

Got any pictures? I don't recall ever seeing a six pack setup like that.

 

[Bill Monk]

Got any pictures? I don't recall ever seeing a six pack setup like that.

He would have a Direct connection setup, no vacuum secondaries. It looks like this:

 

[lewtot184]

I found nothing jumping thru the 3/8" line hoop; but i always wanted to make a set. power is in the pump. you can't increase volume without upping pressure (unless there's some sort of restriction in the 5/16" line and its usually at the double flare). i found it to be a juggling act if you drive the car a bunch. the pump is where i'd put my time and money first.

 

[Sixpactogo]

He would have a Direct connection setup, no vacuum secondaries. It looks like this:
View attachment 438582

Thanks Bill. I'm guessing that set-up would qualify for the gas guzzler tax huh?

 

[Bill Monk]

Thanks Bill. I'm guessing that set-up would qualify for the gas guzzler tax huh?

Umm, Yeah

 

[68 HEMI GTS]

Im building a mechanical set for the rr.
A fellow board member made the linkage.