SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: Horizonjet on October 12, 2014, 12:19:46 AM
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I bought a new electric fuel pump in july and just now got around to installing it. It was supposed to be carb. friendly and only be rated to about 9 psi. I installed it today and it pegged my fuel pressure guage. Question is if I get a fuel pressure regulator do I need the one with the return line or will the regulator without a return line be sufficient?
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My fuel pressure guage only goes to 15psi and needle went all the way around to the pin. Or should I just get a different electric
fuel pump?
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You should be fine without the return line.
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I run a electric fuel pump with regulator and no return line
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I didn't know if it would build up too much pressure and blow the fuel lines off. I did not want to find this out in the middle of the lake. I will get a regulator then and try it this weekend.Thank You!
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I run a electric pump and return regulator setup, makes a much easier job for the pump . Performance is much noticeable with a constant pressure against the needle and seat lowering the chance of flooding . There are some great articles written on the subject especially if you are running juice.
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Nope. Just a mild BBC roller cam and lifters and bored 30 over. Just didn't know it if that was too much pressure to not have a return. I have a fiberglass bow tank and don't know how I would make the return line into the tank.
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IHave a composite fuel tank also, drill and add a a fitting and cementing it in , secure it to something solid .
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What pump did you get?
A bypass regulator will help prevent pressure creep. If you don't have way too much pump, a standard regulator will probably be fine.
You can make your own bypass by adding a -3 fitting, with a nitrous jet installed, off of the low pressure side between the regulator and carb. Return back to the tank and not to the suction side of the pump.
It is best to have a pump that puts out around 25PSI and regulate down at the carb/s. This is so the pump can overcome the G-forces of acceleration working against the inertial forces of the liquid fuel trying to remain at rest. Theoretically, if the pump is regulated to 9PSI, you will see flooding at idle and a pressure drop under acceleration.
Good luck,
Joe
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Thank you Joe. Its like the holley red or blue. I just bought a regular regulator with no return and see how it goes. Now I can run fuel line from bow to stern then to the engine instead of taking the shortest route now. I'll let y'all know how it works out. The regulator I bought says its adj. from 3 to 12 psi.
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Thank you Joe. Its like the holley red or blue. I just bought a regular regulator with no return and see how it goes. Now I can run fuel line from bow to stern then to the engine instead of taking the shortest route now. I'll let y'all know how it works out. The regulator I bought says its adj. from 3 to 12 psi.
The regulator you got should be fine. The red pump shouldn't need a regulator at all. The blue pump, yes. If a Holley carb, 7PSI. This is for a bow tank? Either way try to mount the pump as low as possible, although it doesn't sound like you have any supply issues.
Why are you running your "fuel line from bow to stern then to the engine?" The shortest clean routing is best.
Cheers,
Joe
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I just thought it would look cleaner without the fuel line coming out behind the seats. I do have the holley carb and a bow tank. I guess I will just leave my fuel line routing alone then and go run it. Thanks for the info.
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I just got my fuel pressure regulator today is guess what?.... No instructions. Not even marked what port is in and out. Does anyone know where the in is and what ports are out.
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Bottom should be in and sides are out. It's best if you run one to each float bowl, depending on your carb model. Tee off of one side for your pressure gauge.
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Ok. That settles that. Sounds simple enough. Thanks again
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Who makes it
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Its a pro comp and the holley carb is a 3310. Do they make a metal fuel line for the regulator in the middle and lines out both sides for fuel bowls?
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I would not trust a pro comp fuel reg
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It Chinese
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Its all I got for now. Its worth a shot I guess and if that solved it then get something better and more reliable over the winter
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I use to buy there parts but always had problems
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Maybe u will have better luck
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Hopefully the boat gods will smile upon me too at least get a few good runs out of it
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How much fuel Pursure are u running
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How many carbs
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One carb and my old fuel pump was running at 5psi
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When you first get it plumbed in, bump switch a few times to gradually bring the fuel pressure up. Once you here the pump load up, you can run it continuously. Just watch the bowl vents to make sure that fuel doesn't geiser. If a lot of fuel dumps down the carb into the engine, pull the plugs and crank the engine (ignition & fuel pump off) to make sure you don't hydrostaticly lock a cylinder. Also so that said fuel doesn't seep past the rings and contaminate the oil.
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Good info. Yea. Got to keep a close eye running something new and when using china crap
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Can't be too careful with fuel systems
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Holly reg are 32 bucks
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I am running a holly red and holly fuel reg
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Oh. I'll have to get that set up. That's a little better quality I'm sure
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I am running a holly red and holly fuel reg
That just works trouble free.
The Holley regulator is $29
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See if you can return/exchange that Pro Comp before you put fuel to it.
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Ok. Will do. Thanks
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Ok. Got a holley fuel pressure regulator. In is at the bottom and and the sides are out to the carb. bowls. Do they make a fuel rail for this to go in the center or how should it be mounted? Suggestions??
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I bought a holly fuel rail
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