Way to build the fuel lines. • The Dodge Challenger Message Board

by **plum-crazy** » 28 Jun 2007 14:58

I'm thinking about the best way to build the fuel lines.
The engine builder recommend to me the 1/2" aluminium line from electrical pump to engine bay.
Once here, keeping in mind, the engine will run with two inline carbs what's your opinion about it?

Steel braided rubber hose with hose end fittings to carbs?

Steel braided rubber hose until aluminium adjustable line on the carbs?

He used holleys single feed.

by **dave-r** » 28 Jun 2007 16:26

It don't really matter. The hard line is thiner and easier to secure to the frame I think. But you have the hassle of bending it to shape.

With an electric pump at the rear it is usually easier to bring it up the corner of the bulkhead from the chassis rail. That way you can mount your regulator (if needed) on the bulkhead and feed the carbs from the rear.

But funny enough I am just this afternoon starting to figure out a route for my fuel line.

I am using 1/2 inch i.d. braided hose i got cheap from someone.

Mine has to go to the mechanical pump on the block of course. Then it is going up the front of the radiator to the filter and regulator and back down again to come up the block behind the alternator.

I thought I would run it down the chassis leg to avoid heat from the header as much as possible.

by **dave-r** » 28 Jun 2007 18:21

You saw the fuel lines I bought for the six pack yes?

by **Jon** » 28 Jun 2007 22:49

Man... you guys are running 1/2" fuel lines and I'm wondering whether to upgrad to 3/8" on my 340.

Dave I realize your reasoning behind the routing but it looks kinda vulnerable outside of the frame like that. Lately I have been thinking of using that tin foil tape to cover the line near the headers. Maybe even a standoff shield as used on some motorcycles and ATV's.

by **plum-crazy** » 29 Jun 2007 5:09

Good work Dave.
It looks good on the carbs.
Anyway I will use aluminium line from the fuel pump but mine will be an electrical unit near the tank.
Any special tool for the hose to the fittings?

by **dave-r** » 29 Jun 2007 9:46

Jon wrote:Dave I realize your reasoning behind the routing but it looks kinda vulnerable outside of the frame like that. Lately I have been thinking of using that tin foil tape to cover the line near the headers.

It is not all tied up yet. It will be well out of the way I promise. The only bit exposed below the frail rail will be short and even then that is where the frame kicks high up and is directly over the steering linkage.

A hole in the side of the frame would have been better though.

Plus the steel braiding is really tough. It is like armour plating. :lol:

I was running a 3/8 hard line along the standard route. Which is just under the sill. It got damaged when I had a crash 15 years ago. This braided stuff will take a LOT of abuse without crushing completely or spliting.

I was also wrapping the old 3/8 line with sticky backed 1/4-inch foam pipe lagging, wrapped in kitchen foil, and held together with cable ties.

That worked well to keep the heat out. But looked pig ugly. :lol:

I am running 1/2 inch line all the way to those neat carb lines and pressure guage. Those lines into the carbs are 3/8 internal diameter which is bigger than stock too.

With flow like that (and plenty of pressure into the regulator) I will be able to use a lower pressure from the regulator and into the carbs than I have been using in the past and still keep the fuel bowls full by the top of the strip.

by **fbernard** » 29 Jun 2007 11:38

dave-r wrote:I am running 1/2 inch line all the way to those neat carb lines and pressure guage. Those lines into the carbs are 3/8 internal diameter which is bigger than stock too.

Hey Dave, where did you buy this six-pack fuel line setup?

As far as making the fuel line com up along the bulkhead, that's what I have on my car and I don't like it that much. Going all the way to the front (possible fuel cooler in front of the radiator, fuel filter, all this away from the headers) seems better.

by **plum-crazy** » 29 Jun 2007 12:07

I will order the holly red street pump, with an aluminium 1/2" line. This combo allows running without pressure regulator due maximum pressure at 7 psi, but 95 gph flow.

From aluminium line to carbs steel braided hose.

Anyway, the holleys used have the inlet on the driver side, then the lines must go to the carbs for the firewall.

by **72 Challenger (Hans)** » 29 Jun 2007 12:11

I'm running a 10AN braided hose from the fuel cell to the filter --> pump, then along the frame connector to the front of the car till the firewall where it bents to the upper bit of the bellhousing (all far away from the header). From there on it enters the pressure regulator which is placed just aside the carb from where it enters both carb feeds with 8AN braided hose.

Hope you catch how I've meant it as I couldn't find a photo so far.

by **dave-r** » 29 Jun 2007 12:54

fbernard wrote:Hey Dave, where did you buy this six-pack fuel line setup?

http://promaxcarbs.bizland.com/Sixhome.chtml

by **plum-crazy** » 29 Jun 2007 14:42

Pictures, pictures :s007:

This is a Dodge Charger Daytona.
Car has an Arruzza 517" Hemi inside.

by **dave-r** » 29 Jun 2007 15:41

Don't like the fuel lines like that. :disbelief:

by **Eddie** » 29 Jun 2007 19:07

That Hemi is sweet man! I can dig the magneto dizzy! I am not gonna "dis" the dudes car but I would duplicate the factory way of plumbing the engine compartment for fuel lines to the carb,(front of lower block or rear). This way you are clear of the exhaust system as much as possible. I had a gas fire when I was sixteen, in my SuperBird, it wasnt pretty, and as a result I had to sell the WingedWarrior for 1800.00 bucks, burnt hood and all. It was 1973/1974. If that fire hadn't of happened I am sure my parents would have let me keep that car. Sorry for the long rant, but just passin my experience along with "fabbed" fuel lines. :s024:

by **Misaeus** » 04 Jul 2007 16:20

i agree

factory style lines looks better!