Gas line size
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
What size engine are you running??? The stock size line is plenty for just about anything, except for those 500hp "built" engines if you want to know the truth. In a similar way a 4 barrel carburetor is basically ineffective unless a proper camshaft is utilized, etc. In other words you probably don't need it.
Posting Guru
Joined: Jul 2003
Posts: 2,232
Likes: 1
From: Colville, Washington
What modifications have you done to the engine? The 5/16" line will work up to mild 390 engines, once you go to a larger cam, intake, carb, exhaust, higher cr, and in particular sustained higher rpm's you will need to upgrade the size of the fuel lines.
Thread Starter
|
New User
Joined: Nov 2003
Posts: 11
Likes: 0
The engine that I am in the process of installing is a 351C 2V built by Wilke Performance Specialties. It has forged flat top pistons, ported heads, CompCams extreme energy roller cam with 236/240 duration @ .050, roller rockers, Weiand X-CELerator intake, Holley 770 street avenger carb, MSD distributor, MSD 6AL control box, holley fuel pump, and headers. I have no idea how much HP/TQ this engine will produce but the 5/16's line seemed a little small.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Wow, sounds purty. I can see if you have the buckage you might want to spiffy up the fuel line for cosmetic reasons. The holley site talks about fuel line size and all that, from a technical standpoint I'm not sure there would be any problem. Mechanical fuel pumps can really kick out the pressure if necessary, most engines don't require it though.
Posting Guru
Joined: Jul 2003
Posts: 2,232
Likes: 1
From: Colville, Washington
I would suggest upgrading your fuel line size for that engine. My previous 390 ran out of fuel on sustained pulls-long grades, high speed runs(who?me?!!),towing especially. I went to -8 Russell tubing, hose and fittings, but 3/8" is prolly enough. Most 4 barrel equiped pickups used 3/8" lines from the factory.
BTW sounds like a great engine!
BTW sounds like a great engine!
Thread Starter
|
New User
Joined: Nov 2003
Posts: 11
Likes: 0
Trending Topics
Posting Guru
Joined: Jul 2003
Posts: 2,232
Likes: 1
From: Colville, Washington
I used a Holley base gasket as a pattern to cut a hole in the top front part of the fuel tank where it is flat. A piece of flat aluminum cut to fit and screwed down with stainless screws was used to seal the access hole. I drilled a hole near that access plate for a -8 bulkhead fitting. The access hole is just big enough to get a hand in and work carefully inside the tank. I used aluminum -8 tubing and cut it to fit on the bulkhead fitting and reach near(within 3/8") of the bottom of the tank. That became the fuel pickup. I then ran tubing following the stock line route out of the cab. A piece of braided hose went from the bottom of the cab to more tubing on the inside of the frame and connected to more tubing. The rest was just routing the tubing and connecting to pump, filter, and carb!
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Laughing Gas
Joined: Jun 2003
Posts: 1,218
Likes: 2
From: Parkville, MO (KC)
Ya know -- if you are going to that much trouble and changes to the old in cab tank, as well as new fuel lines anyhow, you really ought to get it over with and put the tank between the rails (quite common, do search). You are going to the trouble of new lines already.
The only problem is the fuel tank filler. I personally think the coolest solution is making or finding one of the licence plate flappers (GM products, 70's), and putting the filler behind it. Getting the tank between the rails (above the spare tire) is pretty easy.
The only problem is the fuel tank filler. I personally think the coolest solution is making or finding one of the licence plate flappers (GM products, 70's), and putting the filler behind it. Getting the tank between the rails (above the spare tire) is pretty easy.
Posting Guru
Joined: Jul 2003
Posts: 2,232
Likes: 1
From: Colville, Washington
A good point cd, I no longer have the in cab tank. I was just telling how I installed it when I did. I agree that a frame mounted tank is better. If you are upgrading fuel line size the technique applies no matter what tank!
Postmaster
Joined: Nov 2002
Posts: 3,447
Likes: 1
From: Littleton, CO
I have tossed around the license plate deal quite a bit myself. The Cougar has the filler like that. Still working on that problem with the tank sitting too tall for the filler hole...
--Mike
--Mike