Fuel pump recommendation
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Teching In
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Fuel pump recommendation Car is a 97 z28, with an ls1 swapped into it. I did not do the work, bought the car this way. I am assuming they dropped in the fuel pump from the 98 donor car. My future plans include a turbo set up, ultimate goal is 700hp to the wheels, but that will be a couple years down the road. I am currently building a 9" rear for the car, completely custom fabricated housing, and I have the tank out to fix a gas smell the car always had. I am looking to replace the fuel pump with one that can handle my future HP goals, because I only want to do this once. Any recommendations? Do I need to go dual pumps? Will one be adequate? External or internal pump better for the street?
Thanks
Matt
Thanks
Matt
How's the longevity of the AEM 380lph vs said 2 Walbro 255s? Steer car that'll see miles and long trips?
Asking because the OP and I are both in the same shoes and I'd rather not make another post asking the same exact question.
Asking because the OP and I are both in the same shoes and I'd rather not make another post asking the same exact question.
Thread Starter
Teching In
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My next question is, what is better? A single in tank (the Walbro 450) or dual 255's?
Why would someone go with dual pumps, if a single larger one will do the same job?
If I go with the aem 380, and run it externally, am I better off sumping my tank, or pulling the fuel through the top?
Forgive me if these Are stupid questions. I come from the old school carburetor world. A lot of this is new to me. I know what I would do with a carb fuel system, this injected stuff has me asking more questions then I can answer at times.
Why would someone go with dual pumps, if a single larger one will do the same job?
If I go with the aem 380, and run it externally, am I better off sumping my tank, or pulling the fuel through the top?
Forgive me if these Are stupid questions. I come from the old school carburetor world. A lot of this is new to me. I know what I would do with a carb fuel system, this injected stuff has me asking more questions then I can answer at times.
The dual 255 intank has been done for many years. If a single 450 or 465 walbro will get it done than go for it. You may want to look into upgrading the stock wiring and fuel lines as well. Not sure how far you can push those
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Going with one pump has its advantages. If one of the dual pumps fail u may or may not notice. If it fails on a pass you will likely lean out and hurt something. I rather have 1 pump if its an option. Easier to trouble shoot IMO.
ideally you want a sump with external inline pumps. Many times its easier to use a surge tank.t
Last edited by Forcefed86; Dec 24, 2015 at 10:52 AM.
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Thread Starter
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okay, so a surge tank is just a small fuel reserve tank that the main pump fills up, to prevent starvation, right?
Is that typically mounted under the hood, and an additional pump mounted inside that to feed the engine?
Is that typically mounted under the hood, and an additional pump mounted inside that to feed the engine?
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From: Norn Iron
The main high pressure pump or pumps will draw fuel from the swirl tank to feed the engine
Generally only needed where you have fuel supply issues due to poor main tank design and intended usage that might see difficulty in maintaining fuel at the pickup.
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You can mount it wherever you like, and is practical.
The main high pressure pump or pumps will draw fuel from the swirl tank to feed the engine
Generally only needed where you have fuel supply issues due to poor main tank design and intended usage that might see difficulty in maintaining fuel at the pickup.
The main high pressure pump or pumps will draw fuel from the swirl tank to feed the engine
Generally only needed where you have fuel supply issues due to poor main tank design and intended usage that might see difficulty in maintaining fuel at the pickup.
I really only want to do this once, with my intended power goals in mind, 700hp, do you think I need a surge tank? Car will be a daily driver, some drag racing, but mostly a DD.
I would think a factory tank, with a sump wouldn't cause any fuel starvation issues?
9 Second Club
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From: Norn Iron
okay, so where does a factory tank with a sump fall into the equation?
I really only want to do this once, with my intended power goals in mind, 700hp, do you think I need a surge tank? Car will be a daily driver, some drag racing, but mostly a DD.
I would think a factory tank, with a sump wouldn't cause any fuel starvation issues?
I really only want to do this once, with my intended power goals in mind, 700hp, do you think I need a surge tank? Car will be a daily driver, some drag racing, but mostly a DD.
I would think a factory tank, with a sump wouldn't cause any fuel starvation issues?
Really...just apply come common sense. Look at the tank, it's easy to see how fuel will move about as the car moves, and determine what you need to do for how you intend to use it.
For straight line use chances of needing a surge tank are slim. Of course that also depends how low on fuel you intend to run the main tank.
If it's always full, the surge would never be an issue to warrant any modifications, sump, surge or otherwise. If you tend to run the tank near empty then clearly you need to think harder about how to maintain a solid supply of fuel to the engine at all times as fuel moves about with the vehicle movement.
For an external pump setup, then a well designed sump can cover most options though.
IMO if you are going to run the factory tank it's usually easier/cheaper to use a surge tank. They are about $35. That way you don't have to cut up the tank and weld a sump on. Just use a cheap internal/external pump of some sort to fill the surge tank and your main inline pump is fed by the surge tank itself.
Is this for a drag car? Do you have a trunk? Whats the lay out? Chassis? Current OEM fuel system?
I ran dual walbros on my old RX7 with no surge/sump. If i drove to the track with a half tank of gas, by the end of the night I'd have fuel starvation issues from the fuel sloshing back. Not to mention you have to carry around an additional 60+lbs of fuel weight all the time. With a surge I could the tank down to a few gallons of gas with no starvation issues. Cheap insurance and weight savings for $35 the way I look at it.
Is this for a drag car? Do you have a trunk? Whats the lay out? Chassis? Current OEM fuel system?
I ran dual walbros on my old RX7 with no surge/sump. If i drove to the track with a half tank of gas, by the end of the night I'd have fuel starvation issues from the fuel sloshing back. Not to mention you have to carry around an additional 60+lbs of fuel weight all the time. With a surge I could the tank down to a few gallons of gas with no starvation issues. Cheap insurance and weight savings for $35 the way I look at it.