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  #1  
Old 01-31-2004, 10:38 PM
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Default fuel lines....

its come to my attention that my stock fuel lines(5/16) arent going to be suffecient to supply the new 360 im dropping into it,so ima need another upgrade.

ive located the replacement lines ill use..theyll be the 3/8 variety.
however i need a lil technical information.

how do i connect these? do i just run the new lines to the stock connection on the fuel tank and connect em with the rubber hoses already there,or do i need to modify/change the fitting on the sending unit to the 3/8 size as well?

and if that be the case does some one make replacement sending units to put in the tank with the bigger 3/8 connection?

any information one would care to share on this will be greatly appreciated.as you can likely tell ive not done this proceedure before and am a lil unfamiliar with the terminology invloved so laymans speak would be nice.

thanks.
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  #2  
Old 01-31-2004, 10:48 PM
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A good person to call or e-mail is Don at
http://www.4secondsflat.com/

I'd use AN fittings to the pump and fuel filter and to the carb. I have SS woven line from the tank to the pump, to the filter and to the carb. You may want to use stainless hard line. That's up to you. If you can get the proper sending unit fixture then use AN fittings there also. I think one of the suppliers has 3/8 replacement sending units. Like Summit.
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Old 01-31-2004, 11:12 PM
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lol...yea Dons the one who told me my 5/16 line was crap....i just havent gotten a reply back from him on my lastest email i sent him.

so was looking for info in general about it.
his site doesnt have the fuel line section up and running yet.ad ya know how busy he gets ,so was looking for answers on my own first so i know what to expect.

i really shoulda just done a "search" here first,found mostly what i was wondering in the old post already made here.

thanks.
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  #4  
Old 01-31-2004, 11:17 PM
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I think Don's out of town this weekend. But I'm no expert.
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Old 02-02-2004, 05:12 PM
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i thought only 440ix packs and hemis came with 3/8 line.
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  #6  
Old 02-02-2004, 06:36 PM
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Wink Fuelin arond...

The max flow in the line[s] will be dictated by the smallest diameter line. Thus, if you have a 5/16" line on the sender unit, and hook a 3/8" to it, the flow is still based on the capacity of the 5/16".

If the goal is 3/8", then the sender should be drilled out, and a 3/8" line soldered in. I would also suggest a silver soldered -6AN [3/8"] male end be put on the outlet tube. This way you can use AN fittings and have a secure system..[Hose clamps ARE NOT the way to secure a good system.]
Use care when bending the hard lines, keeping the bends to a minimum. This helps w/ reducing flow restrictions due to changes in flow direction....
HTH,
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Old 02-02-2004, 09:59 PM
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thanks geezer,thats the clearification i was looking for.
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Old 02-02-2004, 10:06 PM
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moraycen moraycen is offline
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Thumbs up 3/8 lines

Make sure you put a filter BEFORE the pump because you will no longer have factory sock in tank.
Ray
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  #9  
Old 02-02-2004, 11:25 PM
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They make 5/16, 3/8, and 1/2 " sending units. No need to mod one.
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  #10  
Old 02-03-2004, 12:12 AM
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Cheap and simple 3/8" pick-up:

Drop your tank and pop out the sender. Heat the area where the float assembly is soldered and carefully pry off so you can reuse it. Cut the stock tube under the tank cap. Heat the tube near the sender unit/tank metal cap. The line will pop out.

Use the old line as a reference for bending your new 3/8 hard line. Do not drill the tank / sending unit metal cap out to 3/8 - drill it under size and punch it out (use a 3/8 socket in a vise for a guide) to 3/8 size. This gives you a filler area for the new solder.

Re-solder the float assembly on, replace stock sock filter with 3/8 unit (available from your local Chrylser dealer) and put it back in (replace gasket - also available from dealer).

Beside removing the tank, you are looking at 1 to 2 hours for this.

If you use the in tank sock - I wouldn't use a filter before the pump.
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  #11  
Old 02-03-2004, 01:12 AM
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You always use a filter. The sock is not small enough to fiter out debris that will easily clog the needles and seats or jets. Why not just buy a 3/8 unit and be done with it. Take you 10 mintes tops to replace it and you wont have to worry about leaks and damaging the sender and such. Dont make it harder than it has to be.
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  #12  
Old 02-03-2004, 11:13 AM
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ok Dwc sounds great...but do you know if they make 3/8 senders that fit the 83 gran fury (m body) cars?

and if so what the application so i know what to ask the parts jockey for when i enter advance auto?


and to everyone ...thanks for the info its much appreciated.
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  #13  
Old 02-03-2004, 01:22 PM
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Dont think you'll find one at Advance. I have seen many at Year One, Paddock, and some of theracing type stores like Jegs, I think Summit might have them too, but not sure on that one. You;ll have to do a little searching, I know I always have to do it if I need to change one. Course, you could always put a cell in it ...
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  #14  
Old 02-03-2004, 01:27 PM
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I doubt he will find a 3/8 sender unit for a '83 Fury. I bet he will have to fab one. It is not hard, and does not take very long.

I did it - like I said - about 1 to 2 hrs.

I also did not say anything about no filter - I said no filter between tank and pump - keep your filter between pump and carb.

If he plans to use an electric pump, a filter can cause a larger pressure drop. If the electric unit is not mounted low enough, the filter may cause pump cavitation....big time if the filter becomes clogged.
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  #15  
Old 02-03-2004, 01:35 PM
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[QUOTE]Originally posted by Mills

I also did not say anything about no filter - I said no filter between tank and pump - keep your filter between pump and carb

Sorry about that, I misunderstood what you were getting at. On electric fuel pump cars the fitler must go between the tank and pump to protect the pump form damge and the fact that it oushes fuel instead of pulling fuel like a stock pump does. A bowl type filter should be used with an electric pump. The Carter mechanical pump should ne good for most any street car too.
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  #16  
Old 02-04-2004, 12:17 AM
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Hmmm.... $150+ for a replacement sender or $3 and about 20 minutes extra work and you can modify the existing unit. For me, it's a no brainer. I'll modify the existing unit. Then again, I was unemployed for a long time so every penny counts right now.
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  #17  
Old 02-05-2004, 08:36 PM
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Default 3/8 fuel line replacement

I just changed my fuel lines to 3/8" ( Fine Lines) and bought the matching sending unit from Jacobs ( www.jacobsrestoration.com)
which has the 3/8" pickup and the 1/4" return line. Good luck.
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  #18  
Old 02-05-2004, 09:57 PM
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They make a nice piece. Thanks for the link. I book marked it.
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  #19  
Old 02-06-2004, 12:42 PM
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Who are "they".
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