do i need bigger fuel line?
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Joined: Nov 2007
Posts: 291
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From: Fort Worth, TX
Car: 82 Sport coupe
Engine: 355 semi roller
Transmission: TH-350 B&M ratchet shifter
Axle/Gears: 3.73 Eaton Posi
do i need bigger fuel line?
I am installing a 100hp nitrous plate kit. The system uses twin fuel pumps, do i need to upgrade to a 1/2 inch fuel line to supply both pumps or will 3/8 suffice?
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Joined: May 2001
Posts: 2,009
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From: Pitman, NJ
Car: '89 IROC-Z
Engine: Canfield 195 headed 358ci
Transmission: TH350, Art Carr 9.5"
Axle/Gears: 3.92 Dana 44
Re: do i need bigger fuel line?
Really depends on the rest of your setup. How much power are you making without the nitrous? Also running 2 fuel pumps off the same line seems kind of inefficient.... Why not just run a small fuel cell for the nitrous? or upgrade to 1/2" line and a good pump with 2 regulators.
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Joined: Oct 2004
Posts: 805
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From: Charleston, SC
Car: '85 TA
Engine: 350 turbo
Transmission: T56
Axle/Gears: 3.70 posi 9bolt
Re: do i need bigger fuel line?
According to Holley:
Fuel line size is important with EFI, but there is a tendency to oversize feed lines. A high pressure EFI system does not need the same size lines as a low-pressure carbureted engine. A 3/8" diameter line (-6 AN) line is adequate for engines to at least 750 HP. This is a conservative number. A ½" diameter line (-8) line should be used on engines over 750 HP.
Last edited by calebzman; May 5, 2009 at 07:34 AM.
Joined: Jul 2003
Posts: 10,532
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: do i need bigger fuel line?
Originally Posted by 82Five-O
do i need to upgrade to a 1/2 inch fuel line to supply both pumps or will 3/8 suffice?
Thread Starter
Member
Joined: Nov 2007
Posts: 291
Likes: 0
From: Fort Worth, TX
Car: 82 Sport coupe
Engine: 355 semi roller
Transmission: TH-350 B&M ratchet shifter
Axle/Gears: 3.73 Eaton Posi
Re: do i need bigger fuel line?
Really depends on the rest of your setup. How much power are you making without the nitrous? Also running 2 fuel pumps off the same line seems kind of inefficient.... Why not just run a small fuel cell for the nitrous? or upgrade to 1/2" line and a good pump with 2 regulators.
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