so the evo started making a new noise today, and i've been reading conflicting things.
I put my 255 in the car mid-February, and it whined from the get-go but not all that noticeable.
today, we're seeing the warmest day since I've put it in (80°F) and after my usual commute to school (25-30mi) the pump is s c r e a m i n g [video attached]
some posts say when it's warmer out, this happens and it's completely normal. other peoples wally's whined this loud from the get-go; some not at all, and live in warmer places than I do.
AFR's are fine, no lean spots when cruising or on boost when I was on my way home.
ANY input or help is appreciated, will baby car and stay out of boost until I can properly sort it (class tomorrow but off for a few days afterwards)

mods:
tuned on SD
drop in filter
evo 9 BOV
MBC @ 22psi
high flow cat/invidia catback
wally 255

 

i personally couldn't stand the walboro whine

 

Installed Deatschwerks fuel pump after the Walbro ... much quieter ... never looked back.

 

same, been running the dw300, including on e85 with no issues.

 

Sounds normal to me just be thankful you don't have dual 525s in the car. How much fuel in the car that will make a difference.

 

The thing I've learned is that if you want you fuel pump to live forever don't ever go less than a quarter tank of gas

 

UPDATE:
car can't hit boost without leaning out and it cranks hella long before it decides to start. new pump coming from a more reputable source.

 

I've had two genuine Walbro 460 fail within a week of each other, one where the pressure valve (spring-loaded ball bearing) jammed open, letting most of the fuel out the valve, and a brand new one where the magnets on the motor came off and were pulverise by the impeller. Luckily enough I always test new fuel pumps before installing them because the second one would've destroyed my engine if it had been installed in the car, and I recommend to anyone who will listen that they do the same, test them before you install them. Made a quick video about it which is on my YouTube channel.

 

I have had mine for over 10 years and it whines. It's fine!!