WALBRO 255 LPH - INTANK FUEL PUMP

[AccordEpicenter]

Ok i installed a Walbro 255lph before i get boosted in a few mos and the install is fairly easy. I hear everybody whine about how theyre really loud and stuff but if you let it supported on the bottom rubber grommet near the pickup sock and the high pressure hose youll be just fine, it wedges in pretty tight, where everybody gets the loud ass noise is when they zip tie it to the stock hanger. Soo far im using crimped stock wiring, i hope it doesnt get too warm... We will see. So if youre thinking about installing one its not much work, maybe 20 min working slow as fuck... its better to have too much fuel pump than not enough, esp if youre running boost or thinking about it.

[86LXItooFAST4me]

i got my walbro a few days ago. havent installed it yet. did you notice any gain at all without a turbo?

[bobafett]

yeah im planning on getting one of those and an adjustable FPR soon.
after u get it going let us know if there is any gain on a NA car (im not thinking there will be much gain)

[Mike's89AccordLX]

I might get a Holley Fuel pump and FPR for my Weber 32/36. I think it will help the spots where it leans out a bit. And I think then my car won't stall if I have the clutch in and going around a corner at 35 to 40 mph. I tried that to see if it would do it and it did it. But I don't ever have the clutch in like that so I'm not worried.


-Mike

[AccordEpicenter]

well i dont really think there is a gain because the car now runs a bit richer, i think its overwhelming the stock FPR... looks like ill have to upgrade. How good are the cosmo ones on ebay?

[86LXItooFAST4me]

i have a cosmo also, i havent heard a negative thing about them yet.

[bobafett]

starter had to have his rebuilt after almost a year. but they were very helpful and cooperitave if i remember...

[AccordEpicenter]

i ordered an OBX... it was a few bux cheaper than the cosmo but they look like the same thing, ill let you know how it works. Heh its kinda funny because you can hear the walbro prime (its really not THAT loud) and if somebodys sitting in the passenger seat theyre like WTF WAS THAT lol

[bobafett]

hah with my gutted car u can hear the stock one too! and on idle sometimes u get the right frequency inside the car and u can hear is... lol i cant wait until i have a loud ass fuel pump to annoy passengers. ;)

so u noticed no adverse effects to hooking up a walbro on a stock fuel system? i will prolly have to kick down and buy one since its less than $100 shipped on ebay! where did u find a obx AFPR? i would like to take a look at it, the only one i have seen is the cosmo on ebay.

[AccordEpicenter]

its honestly not that loud but it is noticeable... A little louder than stock but who cares. The car does run noticeably richer due to the big ass fuel pump. BTW my back seat is out...

[AccordEpicenter]

Ok i got my obx fpr cuz the car has been running way rich ever since i swapped in the 255lph pump and it wont go below 65 psi... if you give it some gas itll jump to 75 psi... this explains my gas milage problem. As far as i can see the fuel return line is way way smaller than i need so its completely overwhelming it and making my fuel pressure sky high. Should i run new 3/8" steel line for the return line under the car? Im thinking this is what im gonna have to do before i start blowing injectors. Fortunatley no fuel leaks, it just runs pig rich.

[86LXItooFAST4me]

is that OBX FPR adjustable?

[dXsquared]

of course... what else would you put it on for!??!?!?!

Travis

[AccordEpicenter]

ok this is gay... i thought it was that so i installed 1/4 steel return line from the fpr to the tank... no difference... i think this fpr is bad.

[86LXItooFAST4me]

are all FPR adjustable?

[AccordEpicenter]

idk but this one is. I switched from 1/4" to 3/8" no diff... i think the regulator is bad.

[86LXItooFAST4me]

either that or the pump is too much, id try changing the FPR like you said.

[AccordEpicenter]

i tried running the fpr dumping straight into a gas can and there was no diff with that either... this fpr is gay, im gonna have words for the guy that sold it to me.

[bobafett]

try aem or cosmo racing FPR

if you decide not to keep the walbro, i might buy it off you! please let me know

[AccordEpicenter]

Actually im gonna get rid of this crap and try what Larry Widmer at Endyn suggests: drill the stock fpr with a bleed hole (~7/32") that brings the fuel pressure down a whole lot.

[AccordEpicenter]

oops i mean .035"

[86LXItooFAST4me]

im installing mine this weekend but i have a cosmo Adj FPR. ill let you know if i have anyproblems too.

[shepherd79]

if you are running stock motor than that fuel pump is way too big.
they don't recomend that pump untill you are boosting or have some major engine upgrades.
change the fuel pump back to stock. stock fuel pump will do just fine for NA motor.

[86LXItooFAST4me]

but if you had a Adjustable FPR would it hold the pump shepherd? i have alot of stuff dont to my head and intake and injectors so would it be able to handle more fuel or is it just a waist of time? im planning on a FMCU in the future but would it hurt to have the FP on now? especially with all the head and intake work i have?

[wprocomp]

255 is a bit too much for a bolt ons motor...unless you have a high compression ratio,or some sort of power adder the stock pump should do just fine,even with bigger injectors the stock pump should be pefectly fine...the guy that ran DCOE in austin had a stock pump and it ran pefectly fine

[86LXItooFAST4me]

what is DCOE?

[AccordEpicenter]

im gonna be boosted in a few mos...

[86LXItooFAST4me]

me 2, thats why i wanna know if my FPR will hold it for now

[AccordEpicenter]

me too... im sending the obx one back

[shepherd79]

if you set your FPR to about 40psi it should smoth out the richness you are having, but if the pump pumps 60psi at all times, FPR won't do any good to you. i would say put your stock pump back and wait till you get turbo setup.

[AccordEpicenter]

if you set your FPR to about 40psi it should smoth out the richness you are having, but if the pump pumps 60psi at all times, FPR won't do any good to you. i would say put your stock pump back and wait till you get turbo setup.

Well yea i know that, the problem im having is that the FPR wont adjust the psi nomatter i tighten the hell out of it or loosen it... it stays 65-70 psi all the time. I have the stock one back on and im gonna try drilling out the stock FPR. Swapping pumps again is not somthing i want to do esp if im gonna put the 255 back in... Even so itll run rich as fuck when i do so i wanna deal with the pressure problem now while im not boosted so i dont have to worry about it when i am.

[86LXItooFAST4me]

that is a good point. if and when we do get boosted, how do you control the fuel pressure when you have the bigger FP? esp if you have a boost controler? like if you drive around with 2lbs of boost or 20lbs?

[AccordEpicenter]

as long as you can get it to hold steady at around 40 psi everything else can be managed... FMUs (boost referenced FPR) suck ass

[shepherd79]

you can get FPR that will increase the pressure as the boost level will go up. so at idle it may be 40psi, but when you start racing, your pressure will adjust to amount of boost your engine will have.

[86LXItooFAST4me]

what are those called and where do you get them?

[AccordEpicenter]

theyre called FMU's... they really arent a good idea... its much better to control fuel with injector pulses than to force more fuel thru the injector. Plus its hard on pumps.

Anywho, i drilled a .090" hole thru the regulator to bleed off some of the pressure and it seems to be working quite well. Its much much leaner than it used to be and its just slightly rich right now so im guessing the fuel pressure is 45 psi roughly... so its under control for the moment.

[86LXItooFAST4me]

so how is the walbro now? do you still have it on?

[AccordEpicenter]

works fine, been running it for what.. 2 mos now... no probs

[86LXItooFAST4me]

and youre using the stock FPR with a bleeder hole?

[AccordEpicenter]

you got it chief