How hard is it to change to 3/8" fuel lines? May 19, 2007, 09:51:36 PM Just planning ahead. I read somewhere that 5/16 lines will only support up to 300 horsepower. I plan on shooting for 400 so how difficult is it to plumb the fuel system with bigger lines? For that matter is it really necessary to use bigger lines? I mean you'd think if the pump moves fuel through the lines fast enough it wouldn't matter. I'm using a 110 GPH mechanical pump right now. Quote Selected
How hard is it to change to 3/8" fuel lines? Reply #1 – May 19, 2007, 10:11:29 PM Just looking at the Lincoln MK7 fuel tank. I'd imagine it's a direct fit for a Thunderbird and given that the MK7 came with a HO stock I'm guessing it's got 3/8" fittings already like the Mustang. Am I right? Quote Selected
How hard is it to change to 3/8" fuel lines? Reply #2 – May 19, 2007, 10:32:17 PM mustangs dont have 3/8" line either. if you're good with a flaring tool, it can be done easily. or buy braided hose(more expensive) with the corresponding fittings. Quote Selected
How hard is it to change to 3/8" fuel lines? Reply #3 – May 19, 2007, 10:33:34 PM In theory: 3/8" lines would push more volume in the same amount of time as a 5/16" line. Speeding up the fuel draw thru 5/16" lines is no match to running bigger lines.....in theory.example:5/16"=.31" At approx. 16' length of line, you'll hold 58" of fuel by volume, compared to 3/8"=.38 at 16' length which is 87" by volume. So the smaller line holds 2/3 the amount. So you'll need to have a pump capable of moving fuel 1/3 faster than stock. Of course moving air the same amount, too, with all things equal.In theory. Quote Selected
How hard is it to change to 3/8" fuel lines? Reply #4 – May 19, 2007, 10:35:38 PM Hmm. Was sure the mustang had 3/8" lines. Oh well. I've done my own brake lines before, I'm not so much concerned about that. It's the connection to the tank I'm really wondering about. Quote Selected
How hard is it to change to 3/8" fuel lines? Reply #5 – May 19, 2007, 10:38:29 PM with rubber hose and clamps on the pickup tube. Quote Selected
How hard is it to change to 3/8" fuel lines? Reply #6 – May 20, 2007, 12:41:35 AM Quote from: sum_weirdo;148413Hmm. Was sure the mustang had 3/8" lines. Oh well. I've done my own brake lines before, I'm not so much concerned about that. It's the connection to the tank I'm really wondering about.remove the factory pick up tube, and have a 3/8th line brazed inive got one with dual 1/2 pickups somewere :D Quote Selected
Topic: How hard is it to change to 3/8" fuel lines? (Read 1011 times)
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