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Fuel line to big

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  • 1 Post By Boatally Insane
  • 1 Post By SS496
  • 1 Post By Baja Rooster

Fuel line to big


Old 08-12-2018, 05:34 AM
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Join Date: Aug 2016
Location: Melbourne,Australia
My Boat: 29 Scarab
Posts: 68
Default Fuel line to big

Is it possible to have a fuel line that is to big?
I am currently building a 496 that will be somewhere around the 800 hp range.
I will be using an aermotive A1000 fuel pump.
I am having new tanks built and thought I would use a 3/4 inch pickup with -12 fitting running -12 hose to the filter then the pump then using -10 hose to the rail.
I know this is overkill but just wanted to be sure i had no fuel problems
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Old 08-12-2018, 08:39 AM
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Join Date: Nov 2004
Location: Lago Vista TX
My Boat: '05 Velocity 290sc
Posts: 799

That will be fine..
Just watch what filters you're running.. I tried running a cheaper outlet filter and had flow issues..
switched it out for an Aeromotive filter and it's been running flawlessly ever since..

I'm running a Marine Eliminator pump on mine (1000 hp Procharged)
-12 suction line to a 100 micron pre-fiter -10 outlet from pump to a -10 40 micron filter.
This then splits to two -8 hoses to the fuel rails..

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Old 08-13-2018, 07:45 AM
Join Date: Apr 2013
Location: Lake Winnebago
My Boat: 31 Awesome Thundercat, 18 Nordic Jet boat twin turbo 460 Microsquirt
Posts: 130

Only downsides to a "too big" fuel line is

1. cost; not a real concern in a one off application
2. routing; larger line requires a larger radius to bend without kinking
3. Adapters to go "down" to your fuel rail or regulator (see #1)

Ive had really good luck with goldenrod filters.....cheap, flow a ton, filter to 10 micron, available at your local farm supply....certainly overkill...but cheaper over kill.

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Old 08-13-2018, 09:56 AM
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Join Date: Oct 2013
Location: SF Bay Area
My Boat: 1997 Baja Islander 272
Posts: 2,279

I asked Eddie Young the same question and he has run into that issue but it was an extreme mismatch of something like 7/8 line on 500hp. Your set up seems well within reason.
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Old 08-13-2018, 06:35 PM
Join Date: Feb 2012
Location: westville, NJ
My Boat: 1967 34 Hatteras summer house. 2000 Crownline 248ccr her boat. 79 Pantera 24 Sport.
Posts: 3,988

Are her boobs too big? Do you have too much money?
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