Long shot... Walbro
)
13 August 2012, 11:06 AM
#67
Good to hear that you are being sorted, still not clear why you were unable to fasten the pipe to seal, but thats not really the point here. I wasn't challenging the "problem" but seeking clarification on the way it was being presented, the video was, as you say, misleading so its best out of the way.
cheers
bob
cheers
bob
13 August 2012, 11:21 AM
#69
Good to hear that you are being sorted, still not clear why you were unable to fasten the pipe to seal, but thats not really the point here. I wasn't challenging the "problem" but seeking clarification on the way it was being presented, the video was, as you say, misleading so its best out of the way.
cheers
bob
cheers
bob
I feel there must be a problem with this design, If it was flawless then I wouldn't be having an issue and there would be no need for HRC to sell a pump with a lipped outlet pipe.
We tried the same clips/clamps on an OE pump (which has a lip) and had no issues. The hose held the pressure until the pressure relief valve finally opened.
14 August 2012, 01:44 PM
#73
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I've got a 255 hrc fp and whilst mapping I was told it's leaning out so I got a replacement then went back for a check up once fitted and there was an improvement but not brilliant I was told.
14 August 2012, 06:34 PM
#74
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Thought id add a little more today as i managed to get to my garage this afternoon. As ive stated earlier in the thread, I like the op had a low fuel pressure problem. I simply fitted a new pump although the old one was/is only 9 or 10 months old. New pump fitted and fuel pressure all back to normal. I didnt test the old pump so cant say for sure what the problem is with it. so removed the new pump today to see if it had the nipple on the end of the out let pipe and sure enough it does. the one i took out doesnt.
old pump
new pump
old pump
new pump
14 August 2012, 08:23 PM
#80
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we have supplied (genuine" Walbro's for 10yrs+ and have had very few give any problems at all..............
there have been (and probably still are) a number of fake pumps around and i would be more concerned about where you are sourcing stuff than blaming Walbro per se
alyn
there have been (and probably still are) a number of fake pumps around and i would be more concerned about where you are sourcing stuff than blaming Walbro per se
alyn
14 August 2012, 08:43 PM
#81
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we have supplied (genuine" Walbro's for 10yrs+ and have had very few give any problems at all..............
there have been (and probably still are) a number of fake pumps around and i would be more concerned about where you are sourcing stuff than blaming Walbro per se
alyn
there have been (and probably still are) a number of fake pumps around and i would be more concerned about where you are sourcing stuff than blaming Walbro per se
alyn
The other i picked up in person from glencoe
again i doubt there stuff is fake
15 August 2012, 10:35 PM
#82
we have supplied (genuine" Walbro's for 10yrs+ and have had very few give any problems at all..............
there have been (and probably still are) a number of fake pumps around and i would be more concerned about where you are sourcing stuff than blaming Walbro per se
alyn
there have been (and probably still are) a number of fake pumps around and i would be more concerned about where you are sourcing stuff than blaming Walbro per se
alyn
We have come across three recent pump issues that I can think about but none of them were genuine Walbros but presumably cheap copies. I still have a couple here in the workshop.
The STi 3 Wagon had a GS341 255 lph Walbro fitted at least five years ago, perhaps more, and it was only replaced a few weeks ago because while mapping with the SC50 T/S at 509 bhp, Pat Herborn commented that the fuel pump might be getting tired. We would not normally run a Walbro on a high boost application or above 450 bhp and I was very surprised when the pump was taken out and I found it to be a Walbro. I thought I had changed it earlier. I don't think the Walbro was intended to operate beyond 5 bar so 2 bar of boost and 3 bar of fuel pressure, static and you are at the limit of the pump intended application so the very fact that this pump was operating at 509 bhp and 2 bar of boost is a testament to how good it is and I am about to fit it now to a semi standard cheap WRX run around where I am sure it will perform quite adequately for a few more years.
22 September 2012, 08:10 PM
#83
UPDATE....
Been putting the car back together after its re-spray so haven't used it. But finally finished it today and installed the new fuel pump HRC sent me. The new pump has the lip on the outlet pipe that is required and sure enough, the test drive went well. Car held fuel pressure as it should so the old un-lipped pump was clearly at fault.
Been putting the car back together after its re-spray so haven't used it. But finally finished it today and installed the new fuel pump HRC sent me. The new pump has the lip on the outlet pipe that is required and sure enough, the test drive went well. Car held fuel pressure as it should so the old un-lipped pump was clearly at fault.
23 September 2012, 10:07 AM
#84
This has just been sent to me by email for comment and below is exactly correct.
Chocolate O Brian has a particular problem. There is a glich or hesitation, intermittant at light load which he is unable to repeat on command as it were and he wants to get to the bottom of it. To assist his investigation I have supplied him with a secondhand Autometer narrowband AFR guage for £10. The glich is possiblly caused by a momentary weak spot at low RPM eg. around 2K and light throttle and the narrowband guage will assist in identifying the problem. If Andy had £150 or thereabouts to spend on a wideband guage as opposed to £10 for the narrowband that would have been what he was supplied with. The narrowband gauge is quite adequate to serve the purpose of determining whether the glich coincides with an immediate weak spot.
Regards fuel pumps please see my comments above. My Walbro pumps are supplied from the USA and for a number of years we have fitted these to cars producing up to around 450 bhp without ever experiencing a fuel pump issue. This includes cars running methanol. I will continue to supply and fit Walbro fuel pumps until something demonstrably better and more cost effective comes along. A Walbro pump is £75 posted or £100 fitted.
Recently I have come across several fuel pump issues, at least three, where the pumps in use were sold as Walbro but they did not have GS341 or GS342 markings on them. Two of the pumps were sold by the same supplier here in the North East of England. It is my belief these are copies but they are easily identifiable. The genuine Walbro has the Walbro marking/logo etched on the surface along with either GS341 or GS342.
Now as explained above I was unsure what pump was in my STi 3 Wagon. On the rollers at 509 bhp Pat commented that the fuel pump was "getting tired". When I went to replace the fuel pump I was surprised that it was still on a Walbro GS341 that had probably been fitted more than five years ago. I had thought I had already uprated the fuel pump and would have done so before the rolling road session had I been aware it was still the original Walbro. Anyway, another fuel pump was fitted, the next rolling road session with a different strategy and turbo went to 521 bhp and there was no indication of the tired fuel pump.
So from all that I am quite impressed that a five year old Walbro was running 509 bhp successfully but showing signs of running out of capacity and as far as I am concerned this vindicates our cost effective policy of fitting genuine Walbros on cars running up to 450 bhp, which we have done for years and has been very cost effective for the owners.
Incidentally the Walbro removed is now fitted to one of my other vehicles running at less power.
Quote:
Originally Posted by chocolate_o_brian
Hmm, I've got an Autometer narrowband one to fit under advice from Harvey. Why are they crap?
Andy
Narrow band sensors are only accurate right at 14.7:1 air/fuel ratio by weight. They are very inaccurate above and below that
Wideband is way forward if you are looking to know what AFR(Air Fuel ratio) is under WOT,idle,cruising/steady driving etc.
That's why mappers for mapping using rather Wideband than Narrowband
This should help too
http://www.infinite-garage.com/?p=287
Jura
Originally Posted by chocolate_o_brian
Hmm, I've got an Autometer narrowband one to fit under advice from Harvey. Why are they crap?
Andy
Narrow band sensors are only accurate right at 14.7:1 air/fuel ratio by weight. They are very inaccurate above and below that
Wideband is way forward if you are looking to know what AFR(Air Fuel ratio) is under WOT,idle,cruising/steady driving etc.
That's why mappers for mapping using rather Wideband than Narrowband
This should help too
http://www.infinite-garage.com/?p=287
Jura
Regards fuel pumps please see my comments above. My Walbro pumps are supplied from the USA and for a number of years we have fitted these to cars producing up to around 450 bhp without ever experiencing a fuel pump issue. This includes cars running methanol. I will continue to supply and fit Walbro fuel pumps until something demonstrably better and more cost effective comes along. A Walbro pump is £75 posted or £100 fitted.
Recently I have come across several fuel pump issues, at least three, where the pumps in use were sold as Walbro but they did not have GS341 or GS342 markings on them. Two of the pumps were sold by the same supplier here in the North East of England. It is my belief these are copies but they are easily identifiable. The genuine Walbro has the Walbro marking/logo etched on the surface along with either GS341 or GS342.
Now as explained above I was unsure what pump was in my STi 3 Wagon. On the rollers at 509 bhp Pat commented that the fuel pump was "getting tired". When I went to replace the fuel pump I was surprised that it was still on a Walbro GS341 that had probably been fitted more than five years ago. I had thought I had already uprated the fuel pump and would have done so before the rolling road session had I been aware it was still the original Walbro. Anyway, another fuel pump was fitted, the next rolling road session with a different strategy and turbo went to 521 bhp and there was no indication of the tired fuel pump.
So from all that I am quite impressed that a five year old Walbro was running 509 bhp successfully but showing signs of running out of capacity and as far as I am concerned this vindicates our cost effective policy of fitting genuine Walbros on cars running up to 450 bhp, which we have done for years and has been very cost effective for the owners.
Incidentally the Walbro removed is now fitted to one of my other vehicles running at less power.
It is not you (or me for that matter) but for the benefit of the wider audience I thought I should state that neither of us are guilty. I actually have one of these pumps on my bench here.
25 September 2012, 08:09 AM
#89
The lure of a bargain will not change human nature for some people. One of the cars had thousands of pounds spent on it and it was found lacking during mapping. Had that not been found it could have been goodbye engine all for saving £25. If the car had not been mapped the owner would not have had the least suspiscion the pump was U/S and we were bemused when we saw the pump in use. It looks exactly like a Walbro but without the Walbro logo on GS341 or GS342 or other Walbro markings.
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