can you have too big of a fuel pump??

killer5.0 · Nov 14, 2010

i bought a 255 walbro fuel pump b/c i got a good price on it and i planned on doing a 408 stroker...but money is tight so im just going to do h/c/i on my 302 and a new exhaust setup...is it allright to use the 255 or no? i assume it cant hurt but just want to make sure since im a complete motor newbie...thanks

1991notchbackLX · Nov 14, 2010

Invest in a good adjustable fuel pressure regulator and you'll be fine. I ran a walbro 255 in-tank on my H/C/I notch and made 306/311 with no issues. Plenty of guys run the 255 at mild power levels.

Onefine88 · Nov 14, 2010

Run it! You can run that 255 with any combo, that is until you exceed 500rwhp.

killer5.0 · Nov 14, 2010

sweet...i have a bbk fp regulator that works well so....good im glad i can use it. how easy is the install?

BYRDPE · Nov 14, 2010

killer5.0 said:
sweet...i have a bbk fp regulator that works well so....good im glad i can use it. how easy is the install?

the pump or the reg?

fordmuscle395 · Nov 14, 2010

killer5.0 said:
sweet...i have a bbk fp regulator that works well so....good im glad i can use it. how easy is the install?

I assume you talking about the install of the fuel pump? You will need a helping hand when raising and lowering the fuel tank. Make sure you have a new O-ring gasket where the filler neck mates with the fuel tank, it will more than likely tear when the neck is removed.

Just so you know that 255 is loud as crap

BYRDPE · Nov 14, 2010

fordmuscle395 said:
I assume you talking about the install of the fuel pump? You will need a helping hand when raising and lowering the fuel tank. Make sure you have a new O-ring gasket where the filler neck mates with the fuel tank, it will more than likely tear when the neck is removed.

Just so you know that 255 is loud as crap

hmm...mine isn't.

fordmuscle395 · Nov 14, 2010

Mine whines like a beast

tannerc91gt · Nov 14, 2010

Mines loud, sound deadening mat helps and having a coupe. I have neither.

Like someone else said, the 255 is fine with an adj. Reg. I'm making little power Over stock off the bottle but it isn't a problem

dtlionsfan · Nov 14, 2010

I have a highflow 255 with a stock regulator. Its quieter then the stocker.

Maryland Stang · Nov 15, 2010

I use the stock regulator with a Walbro 255 too.

killer5.0 · Nov 15, 2010

there was some bolt ons on the car when i bought it and the fuel pump now whines pretty loud...i wonder if the PO put a different one in? did your stock pump whine? also i will be dynamating the hatch area and installing my custom subbox etc...so hopefully that will help cover the noise...

RatStang · Nov 15, 2010

Some 255s are pretty loud. It's a Luck-of-the-draw kind of thing. Other's are quiet but are isntalled less than perfect.

If the pump or bracket comes in contact with any portion of the tank then it'll resonate off the tank. I tell you this because I've installed one or two that were loud as hell. Bad enough that the whole assembly was pulled apart again to see what was the matter. Often, just reinstalling it and getting the little rubber or-ring around the cap perfectly positioned, cured the problem.

Later, I got into the habit of slaving in a piece of fuel line between the pressure and return ports and feeding power to the pump prior to reinstalling the tank. Just to check the noise before I wrestled the whole damned thing back up into the car.

Just ensure that everything is connected correctly electrically if you choose to do this. You'll never have a better chance of blowing yourself up than you do with an almost empty tank, lots of fuel vapors, lots of air, and a spinning pump than you will when you do this.

--and--

DO NOT DO THIS BY APPLYING POWER DIRECTLY TO THE PUMP TERMINALS.

Install long wire leads to the terminals and connect/disconnect power to teh pump with 15 foot (or more) wires AWAY from the tank.

killer5.0 · Nov 15, 2010

thank you for the install help...sounds like its a fun job...lol

vristang · Nov 15, 2010

Maryland Stang said:
I use the stock regulator with a Walbro 255 too.

Same here... on my n/a 2.3

can you have too big of a fuel pump??

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