Walbro 255 fuel pump -apparantly its rubbish
15 July 2010, 09:27 PM
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Walbro 255 fuel pump -apparantly its rubbish
I have read quite a few debates on here regarding changing from the standard fuel pump to a walbro 255 when tuning but according to this months TOTAL IMPREZA mag (page 50) in a test they carried out the Walbro one was worse than the OEM one so I would not bother changing.
This is what they said " We were very disapointed with the performance of the Walbro 255 unit as it seemed to lock out approaching 5 bar of pressure and struggled more than the factory pump. Considering its the much vaunted status as the replacement fuel pump for the vast majority of tuners it was a surprise that its delivery was exceeded by the standard unit.
This is what they said " We were very disapointed with the performance of the Walbro 255 unit as it seemed to lock out approaching 5 bar of pressure and struggled more than the factory pump. Considering its the much vaunted status as the replacement fuel pump for the vast majority of tuners it was a surprise that its delivery was exceeded by the standard unit.
Last edited by scooby1929; 15 July 2010 at 09:31 PM.
15 July 2010, 09:36 PM
#2
First thing are they sure they've tested a genuine walbro pump & not a copy.
never had any issues with any walbro pumps I've fitted, next thing which standard pump did they test ?? the newage 2.5 comes with a higher capacity pump than the earlier 2.0 ltr cars. as the oem pump gets older the pressure does seem to drop off causing the car to run lean. not heard of any issues regarding the walbro replacement. why else would prodrive used to fit them as part of there ppp upgrades ?
never had any issues with any walbro pumps I've fitted, next thing which standard pump did they test ?? the newage 2.5 comes with a higher capacity pump than the earlier 2.0 ltr cars. as the oem pump gets older the pressure does seem to drop off causing the car to run lean. not heard of any issues regarding the walbro replacement. why else would prodrive used to fit them as part of there ppp upgrades ?
15 July 2010, 09:50 PM
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First thing are they sure they've tested a genuine walbro pump & not a copy.
never had any issues with any walbro pumps I've fitted, next thing which standard pump did they test ?? the newage 2.5 comes with a higher capacity pump than the earlier 2.0 ltr cars. as the oem pump gets older the pressure does seem to drop off causing the car to run lean. not heard of any issues regarding the walbro replacement. why else would prodrive used to fit them as part of there ppp upgrades ?
never had any issues with any walbro pumps I've fitted, next thing which standard pump did they test ?? the newage 2.5 comes with a higher capacity pump than the earlier 2.0 ltr cars. as the oem pump gets older the pressure does seem to drop off causing the car to run lean. not heard of any issues regarding the walbro replacement. why else would prodrive used to fit them as part of there ppp upgrades ?
15 July 2010, 10:06 PM
#6
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I've always maintained, as an Engineer, that the standard pump is absolutely fine for 99.9% of applications.
More fuel is returned to the tank than is used - quite why you would want to pump even more (and return more) is a mystery to me.
One of the misleading mods. regarded as important by hobbyists ...
Save your hard earned and forget about 'uprating' your fuel pump! If you are in the business of racing/rallying then you know what you need and will do what is needed - but, a car used for fast road use does not need anything like these.
More fuel is returned to the tank than is used - quite why you would want to pump even more (and return more) is a mystery to me.
One of the misleading mods. regarded as important by hobbyists ...
Save your hard earned and forget about 'uprating' your fuel pump! If you are in the business of racing/rallying then you know what you need and will do what is needed - but, a car used for fast road use does not need anything like these.
15 July 2010, 10:17 PM
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I've always maintained, as an Engineer, that the standard pump is absolutely fine for 99.9% of applications.
More fuel is returned to the tank than is used - quite why you would want to pump even more (and return more) is a mystery to me.
One of the misleading mods. regarded as important by hobbyists ...
Save your hard earned and forget about 'uprating' your fuel pump! If you are in the business of racing/rallying then you know what you need and will do what is needed - but, a car used for fast road use does not need anything like these.
More fuel is returned to the tank than is used - quite why you would want to pump even more (and return more) is a mystery to me.
One of the misleading mods. regarded as important by hobbyists ...
Save your hard earned and forget about 'uprating' your fuel pump! If you are in the business of racing/rallying then you know what you need and will do what is needed - but, a car used for fast road use does not need anything like these.
Well according to Mark Wilson (engine wizard scoobyclinic) a standard fuel pump can deliver an adequate amount to the unit to cater for upwards of 490 bhp
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15 July 2010, 10:19 PM
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Pete, if the standard pump is sufficient then why as part of PPP upgrade offered by Subaru is the fuel pump upgraded with a Walbro pump rebranded by Prodrive? 
Or are Prodrive 'hobbyists' who don't have a clue?
While we are on the subject why do Subaru fit upgraded fuel pumps to the Spec C's and other variants?
Or are Prodrive 'hobbyists' who don't have a clue?
While we are on the subject why do Subaru fit upgraded fuel pumps to the Spec C's and other variants?
15 July 2010, 10:22 PM
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the other point is if you have a car like mine that is now pushing 15 years old, the pump is not going to be up to scratch. so do i pay a stupid amount for a standard pump from subaru or buy the walbro which can future proof my system incase i go for it big style and plus it costs pocket money.
15 July 2010, 10:25 PM
#11
the other point is if you have a car like mine that is now pushing 15 years old, the pump is not going to be up to scratch. so do i pay a stupid amount for a standard pump from subaru or buy the walbro which can future proof my system incase i go for it big style and plus it costs pocket money.
15 July 2010, 10:33 PM
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the standard pump is great for short bursts but leans out if your giving it the boot for extended times, lean equals lots of smoke and an expensive bill as i discovered on my old car. makes sense to pump a bit more fuel through even if its not all being used.
15 July 2010, 10:33 PM
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So then Pete and his new friend would you care to explain why Prodrive used Walbro pumps and Subaru also use upgraded pumps as well?
I am curious as to why they would upgrade the fuel pumps when the standard pump is claimed to be sufficient?
I am curious as to why they would upgrade the fuel pumps when the standard pump is claimed to be sufficient?
15 July 2010, 10:36 PM
#21
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Considering the fact that most of the pumped fuel is returned to the tank, I suspect that the fuel pump (even a standard one of 15 years old) will still be supplying more than the engine needs.
15 July 2010, 10:40 PM
#23
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Indeed mate ..... sometimes things are 'expected' and are supplied to those who are stupid enough to buy ...
They are marketing to those who are willing to pay through the nose and through ignorance ...
They are marketing to those who are willing to pay through the nose and through ignorance ...
15 July 2010, 10:42 PM
#24
I'm aware of the minimal wear and tear a submersible fuel pump would be subjected to after 15 years ............. but the question I asked was, "Why would it supply less fuel than the engine needs?"
Considering the fact that most of the pumped fuel is returned to the tank, I suspect that the fuel pump (even a standard one of 15 years old) will still be supplying more than the engine needs.
Considering the fact that most of the pumped fuel is returned to the tank, I suspect that the fuel pump (even a standard one of 15 years old) will still be supplying more than the engine needs.
15 July 2010, 10:44 PM
#25
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You mean the pressure regulated by the pressure regulator?
In that case, uprate the Regulator!
But, yes, if you are replacing the pump in any case ... use what you think you need - but, please, don't confuse yourself that you 'need' one.
In that case, uprate the Regulator!
But, yes, if you are replacing the pump in any case ... use what you think you need - but, please, don't confuse yourself that you 'need' one.
Last edited by pslewis; 15 July 2010 at 10:46 PM.
15 July 2010, 10:47 PM
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Thats totally different. If I was spending 3k on an engine build then yes I would buy a new fuel pump, oil pump, water pump etc if the old ones were 15 years old
Last edited by scooby1929; 15 July 2010 at 10:48 PM.
15 July 2010, 10:50 PM
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Ignorance really must be bliss, if I get Total Impreza to state that a TD04 is capable of 400bhp then you can then decry all the turbocharger variants as well.
As a matter of interest Pete do you read Total Impreza as it is full of errors/inaccuracies, not to mention poorly written and was probably written by an infinite amount of chimpanzees with an infinite amount of time.
When do you both start writing for them?
15 July 2010, 10:57 PM
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At least now Pete you have a new ally.
Ignorance really must be bliss, if I get Total Impreza to state that a TD04 is capable of 400bhp then you can then decry all the turbocharger variants as well.
As a matter of interest Pete do you read Total Impreza as it is full of errors/inaccuracies, not to mention poorly written and was probably written by an infinite amount of chimpanzees with an infinite amount of time.
When do you both start writing for them?
Ignorance really must be bliss, if I get Total Impreza to state that a TD04 is capable of 400bhp then you can then decry all the turbocharger variants as well.
As a matter of interest Pete do you read Total Impreza as it is full of errors/inaccuracies, not to mention poorly written and was probably written by an infinite amount of chimpanzees with an infinite amount of time.
When do you both start writing for them?
15 July 2010, 10:58 PM
#30
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It's the justifications given which drive me nuts
