Author Topic: 1/2 inch fuel line  (Read 4325 times)

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Offline 1454blackburn

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1/2 inch fuel line
« on: August 07, 2007, 10:03:37 PM »
   I need to replace the stock 3/8 fuel line with a 1/2 inch . my problem is the line that enters into the tank is only 3/8 and isn't easily made to 1/2 inch . Does anybody make a new unit to drop in that has a larger suction line with the gauge unit on it ? Or can I just block it off , and drill a hole in the  sending unit  for a 1/2 line and run a new line out of it ? If so what type/brand of fittings can I use to assure it wont leak there ? I dont want to run a fuel cell ,and would like to keep the factory tank for a stock looking appearance ? Any input would be most appreciated.

Offline eroc022

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Re: 1/2 inch fuel line
« Reply #1 on: August 11, 2007, 06:53:00 PM »
why do you have to go to 1/2 inch ? if you have a motor that powerful then you should probablly run an electric pump which then you will just need to add a sump to your gas tank.....that is if you absolutely need 1/2 inch line
Fixing the car that Restore A Muscle Car jacked up....

Offline Shimpoe

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Re: 1/2 inch fuel line
« Reply #2 on: August 21, 2007, 08:02:56 PM »
anyone know of a place that sells a cap for the fuel pump port for when you take it out ?

Offline TAKID455

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Re: 1/2 inch fuel line
« Reply #3 on: October 15, 2007, 09:12:44 AM »
eroc is correct w/ needing an electric pump if you engine can utilize a 1/2" line. One thing I found out is that a 7/16" line would probably work , but a -7 AN fitting does not exist so that makes people go to the 1/2" line. just be sure to have a 3/8" return line. one thing to keep in mind s that as the fuel flows back to te tank, it is heating up due to friction. hot fuel is not the best for performance. A sump would be beneficial, however it is not nessecary unless do plan on cornering hard on low fuel. as for the in tank inlet, i would think you could replace it with a 1/2" pipe, just weld it up nicely. block off plates are available from many places, pioneer, kre, summit ect. or just take a piece of aluminum and cut and drill it to the shape you need.
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Offline xtrmeta

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Re: 1/2 inch fuel line
« Reply #4 on: October 18, 2007, 08:49:40 AM »
Why do you need 1/2" line. My car has an 8-71 Blower in it pushing 800HP and I am only running a 3/8 line.
76 Pro Street T/A, 8-71 Supercharged 454 Big Block Chevy, TH400 full manual. S&W Race Cars Super car rear, 4 link setup with coil overs and 4:56 gears.

Offline Joker (§ir£Ğragon)

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Re: 1/2 inch fuel line
« Reply #5 on: October 18, 2007, 01:29:24 PM »
I've never run anything larger than 3/8" either. I've got plumbing in my house smaller than 1/2". lol

Offline rad400

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Re: 1/2 inch fuel line
« Reply #6 on: November 05, 2007, 02:50:22 PM »
If u are raceing 1/2" line aluminum is what you need. Espesicaly if its a work 455. If its a mild 400 keep the 3/8". Work 455 meaning e-heads or kre heads flowing and big cam 540 or bigger. A friend had a worked 455 ran slower with 3/8" lines than the junk yard 455 with same lines. Replaced with 1/2 lines and picked up a full sec. will be better wants dialed in.
79 Trans am 400 t400 3500 stall #12 heads holley 750 vac carb. Torker II intake 3:73:1 gears 12 bolt rear.