do i need bigger fuel line?
05-04-2009, 10:31 AM
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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?
05-04-2009, 12:17 PM
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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.
05-05-2009, 07:30 AM
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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; 05-05-2009 at 07:34 AM.
05-07-2009, 12:28 AM
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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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