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5/16 or 3/8 Fuel Line? #67401
06/04/08 12:29 PM
06/04/08 12:29 PM
Joined: May 2007
Posts: 545
Massachusetts
LYNCHROAD69.5 Offline OP
mopar
LYNCHROAD69.5  Offline OP
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Joined: May 2007
Posts: 545
Massachusetts
Replacing all my fuel lines and wanted some feedback on fuel line diameter. I believe original lines on my A12 car are 5/16". Should I replace with same or go to 3/8"? Any feedback would be appreciated.

Re: 5/16 or 3/8 Fuel Line? [Re: LYNCHROAD69.5] #67402
06/04/08 01:02 PM
06/04/08 01:02 PM
Joined: Nov 2003
Posts: 5,048
Atlanta Indiana
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Dave Watt Offline
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Dave Watt  Offline
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Atlanta Indiana
Yes, the original A12 lines are 5/16". If you look at any of the guys running the Muscle Car Drag Races, they all have 3/8" for the performance.

Re: 5/16 or 3/8 Fuel Line? [Re: Dave Watt] #67403
06/04/08 01:19 PM
06/04/08 01:19 PM
Joined: May 2007
Posts: 545
Massachusetts
LYNCHROAD69.5 Offline OP
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LYNCHROAD69.5  Offline OP
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Joined: May 2007
Posts: 545
Massachusetts
Dave, any opinion on if I should go to 3/8 or not?

Re: 5/16 or 3/8 Fuel Line? [Re: LYNCHROAD69.5] #67404
06/04/08 01:32 PM
06/04/08 01:32 PM
Joined: Feb 2005
Posts: 2,158
God's Country - Etowah, TN.
A34 Offline
top fuel
A34  Offline
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God's Country - Etowah, TN.
3/8" for performance, unless you're doing a super OE level resto.


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Re: 5/16 or 3/8 Fuel Line? [Re: A34] #67405
06/04/08 02:20 PM
06/04/08 02:20 PM
Joined: Nov 2003
Posts: 5,048
Atlanta Indiana
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Dave Watt Offline
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Dave Watt  Offline
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Atlanta Indiana
Quote:

3/8" for performance, unless you're doing a super OE level resto.



Re: 5/16 or 3/8 Fuel Line? [Re: Dave Watt] #67406
06/04/08 07:55 PM
06/04/08 07:55 PM
Joined: Jan 2003
Posts: 6,182
Bridgeport, WV
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Michael Offline
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Michael  Offline
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Bridgeport, WV
The 5/16" line will be fine.

Re: 5/16 or 3/8 Fuel Line? [Re: Michael] #67407
06/04/08 08:20 PM
06/04/08 08:20 PM

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Anonymous
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for a stock car keep it 5/16", you'll have to change your sending unit also if you go with 3/8" line. you wont need 3/8" for stock application.

Re: 5/16 or 3/8 Fuel Line? #67408
06/04/08 09:37 PM
06/04/08 09:37 PM
Joined: May 2004
Posts: 5,123
Warrenton, VA
RoadRunnerJD Offline
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RoadRunnerJD  Offline
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Warrenton, VA
The stock sending unit has a 3/8" outlet. If you go with the Hemi 3/8" fuel line to the fuel pump and then 5/16" from the fuel pump up to the vapor separator, nobody will notice or it wouldn't matter if they did. In fact, I thought I heard the 70 sixpack's were upgraded to the 3/8" fuel line and have a 3/8" inlet in the fuel pump? On the other hand, the 5/16" always worked fine for me on my A12.







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