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Walbro 255

boosted_32

By boosted_32,
in Engines & Forced Induction

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The Mafia Grand Master

The Mafia

Posted
Posted (edited)

nope, I had one, leaned out at 280rwkw and above.

at 300rwkw, the afrs wouldn't go below 12.8:1, even with the injectors completely maxed in the power FC.

Have you seen the flow chart? Watch the blue line below 60psi.... Terrible!

post-7271-1202125347_thumb.jpg

Edited by The Mafia
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R31Nismoid Grand Master

R31Nismoid

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mine saw the end of its performance @ 240-250rwkw

Walbro's are a mixed bag.

Sometimes they work, sometimes they dont... i wasnt even running upped rail pressures over normal conditions

There are FAR too many threads now with people and Walbros who have fuel issues.

I simply dont trust them. Have used Bosch for the lasf 4 years since.

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The Mafia Grand Master

The Mafia

Posted
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mine was ok, just ran out of flow.

Remember the ratings -

Walboro 255 is 255lph at 40psi

Nismo 275lph is at 275lph at 70psi (What I have now)

Nismo is a perfect pump, drops straight in like factory, has a factory bracket, hoses and plug etc. I'll never touch a bosche.

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R34GTFOUR Mentor

R34GTFOUR

Posted
Posted
mine was ok, just ran out of flow.

Remember the ratings -

Walboro 255 is 255lph at 40psi

Nismo 275lph is at 275lph at 70psi (What I have now)

Nismo is a perfect pump, drops straight in like factory, has a factory bracket, hoses and plug etc. I'll never touch a bosche.

and walbro rate there pumps at a voltage which isnt achieved in a "normal" car, sneaky haha

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VB- Veteran

VB-

Posted
Posted
Have you seen the flow chart? Watch the blue line below 60psi.... Terrible!

whats terrible about it? i dont look at fuel flow graphs often but it seems to flow a fair bit below 60psi? its above 60 that it really drops off. and why does more pressure result in less flow? i thought mroe pressure would mean more flow?

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The Mafia Grand Master

The Mafia

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yeah well think about it - rail pressure is 42psi + your boost (maybe 12psi?)

Thats a total of 54psi fuel pressure needed to drive the injectors. I don't know about you but thats putting the pump on edge and I wouldn't risk it.

Its a POS.

Actually, it was meant for NA applications..... Its pretty obvious..

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GreeceS13 Rising Star

GreeceS13

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I am in the same dilema but I want something for 400-440wkw

My opinion is.... two walbros!!! Two walbros are cheaper than one 044! Here in Greece my mechanic said me that he saw many 044 to broke.. and aeromotive to broke...!! So he said me that with all pumps we have the danger to broke!

They broke either if you stay without fuel or if you leave the fuel for very long time (one aeromotive broke with the last way)!

If one of your two walbro damaged the other will work :D

So more safe!! :P

As I understand here in australian you don't use walbros... Here in Greece all people untill 500 fly hp use one walbro!

All are happy untill 500 with one walbro... too much scooby, evo etc!

After 500 you need a decent fuel setup as many people here told me what to do (surge tank solution with total 3 pumps)

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