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01-20-2008, 03:20 PM
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#1 |
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Registered User
 
Join Date: Jan 2006
Location: Warrington, PA
Posts: 403
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Fuel Line Size?
Hey guys,
I am in the process of a motor upgrade from a 2bbl 305 to a 4bbl 250hp 350. The original fuel line from the in cab gas tank is a 5/16 line. I want to replace this line with a new one. Is a 5/16 line acceptable for my new 250hp motor, or should i use a 3/8 line?....thanks.....rick |
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01-20-2008, 07:59 PM
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#2 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Fuel Line Size?
if you had a 305 V-6, then you should have the 3/8 line.
5/16ths will be plenty. |
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01-21-2008, 12:15 AM
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#3 |
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Firefighter
Join Date: Feb 2001
Location: Yellville, Ar, USA
Posts: 1,943
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Re: Fuel Line Size?
For the 350 go to 3/8" line.
__________________
'72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA  
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01-21-2008, 11:35 AM
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#4 |
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Registered User
Join Date: Jan 2006
Location: Warrington, PA
Posts: 403
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Re: Fuel Line Size?
yea, 3/8 seems the way to go, but will I have to change the sending unit?
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01-21-2008, 11:39 AM
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#5 |
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Registered User
Join Date: Jan 2006
Location: Warrington, PA
Posts: 403
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Re: Fuel Line Size?
Andy, the 305 was installed by PO donated from a 76 camaro. I pulled a 5/16 fuel line out of the frame rail, so i assume that the truck originally had a inline 6 in it. I thought all V8's came with a 3/8" line?...Rick
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01-21-2008, 12:06 PM
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#6 |
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Registered User
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 1,534
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Re: Fuel Line Size?
Nope, the small v-8 and I-6 had 5/16 lines. Stay with what you have. The 350's did have 3/8. I don't think you need 3/8 unless you're feeding 350 plus hp. MHO
__________________
'72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction. 
Last edited by Sweet72; 01-21-2008 at 12:07 PM. |
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01-21-2008, 12:11 PM
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#7 |
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Registered User
Join Date: Jan 2006
Location: Warrington, PA
Posts: 403
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Re: Fuel Line Size?
thanks
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01-21-2008, 01:02 PM
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#8 |
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Registered User
Join Date: Dec 2006
Location: Trinidad, Colorado
Posts: 642
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Re: Fuel Line Size?
I feed a dyno'd 500HP BBC with the stock fuel line from a 69 frame with a 292.....No need for upgrade...
A......
__________________
69' 3/4 4X4 470ci BBC 700 HP.... D60/14bolt 205/465 http://profile.myspace.com/index.cfm...ndid=127691959 |
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