runningnew fuel lines for a carb -> EFI converions-- what/where should I run?

[jmg222]

I'm dropping in a holly terminator TBI unit on -- currently running a 350 conversion 88 Cherokee, which I stupidly put on a carb rather than EFI.

I currently have a (stainless) fuel line running up the passenger side, in the frame rail, from the tank to the engine compartment It's fairly small diameter, so I plan on using that for the return. I need to run a high pressure line for the EFI, but threading it into the holes where the current line is is damn near impossible.

I really don't want to cut larger holes in the frame to run the fuel line if I don't have to ... thoughts on how to run it? I completely forgot, how are the fuel lines run stock? I'm thinking of maybe running them on top of the rails on the driver side (battery cables are run from the rear to the front outside the frame, so I don't want to run a high pressure fuel line right next to them), and then up into the engine bay near the wheel wells, before the exhaust manifolds or the steering box.

Also debating between solid stainless line vs. stainless steel braided line. Based on what I can tell, the stainless steel braided is just as good for my needs as stainless tube.

anyway, thoughts appreciated

 

[trippled]

Think tbi only runs 12-15 psi unless holleys is different. Stock runs up the inside of drivers frame rail. I would think running solid for the long straight sections and braided everywhere else will be more than adequate. I would just secure with cushion clamps and self tappers.

 

[jmg222]

Think tbi only runs 12-15 psi unless holleys is different. Stock runs up the inside of drivers frame rail. I would think running solid for the long straight sections and braided everywhere else will be more than adequate. I would just secure with cushion clamps and self tappers.

Thanks. That's helpful. Unfortunately, unless someone has any ideas, I just can't get the @#$@#$ line snaked through the frame rail. Is there some trick to doing this?

If I run hard line (stainless) on the *outside* of the rail, I'm thinking as close as possible to where it meets the floor pans, is this going to be an issue?

And BTW, the holly unit runs at 40PSI.

 

[PhotoJared]

The stock lines run on the inside of the drivers frame rail.

With my LS swap I'll be running a braided stainless line because its easier.

 

[Hypoid]

Thanks. That's helpful. Unfortunately, unless someone has any ideas, I just can't get the @#$@#$ line snaked through the frame rail. Is there some trick to doing this?

If I run hard line (stainless) on the *outside* of the rail, I'm thinking as close as possible to where it meets the floor pans, is this going to be an issue?

:doh:

Lets try a new word: The fuel and vapor lines run on the inboard side of the driver's frame rail. The stock exhaust runs on the inboard side of the passenger frame rail. If you were to run dual exhaust, on the inboard side of both frame rails, you might have to invent a new location for the fuel/vapor lines.

 

[jmg222]

:doh:

Lets try a new word: The fuel and vapor lines run on the inboard side of the driver's frame rail. The stock exhaust runs on the inboard side of the passenger frame rail. If you were to run dual exhaust, on the inboard side of both frame rails, you might have to invent a new location for the fuel/vapor lines.

:huh:
Ok-- I'm not following if you're trying to be a wize azz or actually being helpful.
Just so we can get on the same page here --- the frame rails are hollow. The fuel lines are run, in stock configuration, inside the frame rail.

So, I'm just not getting your hangup on "inboard":

The fuel and vapor lines run on the inboard side of the driver's frame rail.

If by "inboard" you mean "inside" the frame rail, then I get this. but I can't reconcile with this statement:

If you were to run dual exhaust, on the inboard side of both frame rails, you might have to invent a new location for the fuel/vapor lines.

I am running dual exhaust. on both sides. On the inboard side of the frame rail. But since my fuel line is inside the frame rail, I don't have to invent a new location for the fuel lines.
The reason I'm having trouble with your post is what exactly do you mean by "inboard"? do you really mean "inside"? if so, why on earth would anyone, ever, run dual exhaust "inboard" (assuming you mean "inside") the frame rails?

so...take a deep breath, and try again, please.

 

[jmg222]

The stock lines run on the inside of the drivers frame rail.

With my LS swap I'll be running a braided stainless line because its easier.

are you going to run the stainless lines inside the frame rails? is there some secret pocket door in the rail that I'm missing that makes running the line trivial? I'd love to run the lines inside the rail, but for the life of me can't figure out how to do it... I've tried running a snake, running an aluminum tube as a runner to pull through the steel line, I've tried just shoving the steel line through...

anyway, I've looked at it, and tucked on the outside of the frame rail, high up where the l rail meets the floor board, seems pretty safe to me.

 

[PhotoJared]

are you going to run the stainless lines inside the frame rails? is there some secret pocket door in the rail that I'm missing that makes running the line trivial? I'd love to run the lines inside the rail, but for the life of me can't figure out how to do it... I've tried running a snake, running an aluminum tube as a runner to pull through the steel line, I've tried just shoving the steel line through...

anyway, I've looked at it, and tucked on the outside of the frame rail, high up where the l rail meets the floor board, seems pretty safe to me.

No dude not literally inside the frame. They're set on the inboard portion of the frame rail.

 

[Hypoid]

No dude not literally inside the frame. They're set on the inboard portion of the frame rail.

Thank you.

 

[jmg222]

No dude not literally inside the frame. They're set on the inboard portion of the frame rail.

ok, then maybe I'm the one that's confusing things. When I say "inside," I'm not confusing "inboard" with "inside" --- I literally mean "inside"-- i.e., through the center, hollow portion of the frame.

With that clarification, you're running your lines inboard, but not inside, the frame rail?

 

[PhotoJared]

The stock lines run on the inboard side of the driver frame rail.

 

[BENZOMATIC]

Do not run any lines "inside" your frame rail. It's a recipe for disaster.

Any length of hardline needs to be properly supported along the length of the line with a clamp of some type. You just can't do it if you put the lines literally inside of the frame. They will move & rub until you have a leak or a hole somewhere.

Inboard of the frame rail is best...hell even secure them to the bottom of the floor. It's a bitch with the dual exhaust I'm sure. Proper heat shielding and creative exhaust routing will be your friend.

 

[jmg222]

Do not run any lines "inside" your frame rail. It's a recipe for disaster.

Any length of hardline needs to be properly supported along the length of the line with a clamp of some type. You just can't do it if you put the lines literally inside of the frame. They will move & rub until you have a leak or a hole somewhere.

Inboard of the frame rail is best...hell even secure them to the bottom of the floor. It's a bitch with the dual exhaust I'm sure. Proper heat shielding and creative exhaust routing will be your friend.

Thanks. this is helpful.
Believe it or not, the dual exhaust is not really an issue -- we ran it pretty close down the center, and it exits in front of the rear wheels.