DW100
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| posted on 2/4/14 at 12:23 PM |
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If you are running a fuel rail with a return, the speed of the car makes very little difference quantity of fuel flowing. The amount of fuel used will
affect the volume in the return line though.
Noisy pumps can be a faulty pump or running dry.
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AlexXtreme
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| posted on 9/4/14 at 03:41 PM |
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Hi Guys,
thanks for your help on this and I have decided to bit the bullet and replace the system with something that works, rather than that was fitted by the
factory and did not :-(.
Anyway I have decided to go with this swirl pot as it can fit in the limited space I have
http://www.fuelpumpsonline.co.uk/fse-fuel-swirl-pump-pot-ccp001-241-p.asp
together with an inline fuel pump either the Bosch or similar
What find of priming fuel pump do I need... I number of companies have suggested one of these but do I need to go this far for a priming pump?
Std facet pump
http://www.fuelpumpsonline.co.uk/facet-cylindrical-pumps-12v-1821-c.asp
would one of these
Facet posi pump
http://www.fuelpumpsonline.co.uk/facet-posi-flow-pumps-1819-c.asp
or these work
red tops cylinder pump
http://www.fuelpumpsonline.co.uk/facet-solid-state-pumps-12v-1820-c.asp
The pump will be mounted under the tank so will not need to be primed. Most of the pumps will push 32 gallons / hour and as it is only filling the
swirl pot, why should I go for the higher spec pump...
I guess some are quieter / more reliable etc, but this is not for a day-to-day used car and will only get occasional track use :-)
Cheers
Alex
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ashg
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| posted on 9/4/14 at 04:46 PM |
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Do the simple things first. Replace the filter and give the tank a flush out with some white spirit. If it still does it check the wiring, pump
etc.
Chris (Toltec on here) had a similar issue, the filter looked fine, but when we replaced it his fuel starve issue went away
Anything With Tits or Wheels Will cost you MONEY!!
Haynes Roadster (Finished)
Exocet (Finished & Sold)
New Project (Started)
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sssline
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| posted on 9/4/14 at 07:44 PM |
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Hi,
The std xtreme fuel tank has a vent point, visible with drivers side rear wheel off, top right hand corner looking in from there, I would expect to
see a pipe from this via a breather valve.
Cheers
Tony.R
https://www.facebook.com/groups/swkitcars/
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AlexXtreme
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| posted on 9/4/14 at 09:09 PM |
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Hi ashg,
initially I thought it was the filter however it seems to get worse with time which I am assumed was the pump getting hot and starting to fail.
Talking to a manufacture of pumps, in-line pumps can only run dry for max 30 seconds before serious is damage is done to them due the very high rpm
and damage can start much earlier.
I have brought a new filter and will give it a try however long term I think I will need to change the arrangement as I can not run below 40% fuel
without hearing the pump running dry round corners :-(.
Will definitely change the filter to see if it saves me buying another in-line pump though
One other thought was would the swirl pot I propose work with just a gravity feed.
sssline, I can see a return running up from the return piping from the near side over the tank. I did not know which side the vent fitting was though
and I will have a good look over the weekend! Do you know what size the std push pipe fitting is on the xtreme tank? As far as I can tell it is 12mm.
I am having trouble in getting the rest of any set up in 12mm as the std seems 10mm, i guess a reducer would solve this problem. Are those pics of
your car I can see that you have posted?? fantastic looking dash!
Cheers
Alex
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sssline
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| posted on 10/4/14 at 03:36 PM |
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Hi Alex,
Top pipes fittings (return) are std 8mm, I think, fuel out on mine is 19mm so I adapted down...
Pictures of my build are on Flickr, there are some of the fuel tank etc in here. https://www.flickr.com/photos/sssline/sets/72157631181387380/
Cheers
Tony.R
Ps I get about 4 gallons of use out of the tank before the pump starts to get starved, did hope a large fuel filter would act as a bit of a reserve on
cornering but the flow rate is pretty quick, I am aware of a supercharged XT locally that added a extra sump to the bottom of his tank to overcome
surge, tank out for that tho...
https://www.facebook.com/groups/swkitcars/
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BaileyPerformance
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| posted on 10/4/14 at 09:23 PM |
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The fuel filter should be after the pump, not before, you do not need a filter before the pump - it can also restrict the flow to the pump.
The pump must be below the tank, most EFI pumps are poor at sucking fuel, so a good head of fuel is required.
A genuine Busch pump (from Escort RS turbo or sierra Cosworth) mounted below the tank (no pre-filter) with 12mm feed and 8mm outlet will work fine.
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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AlexXtreme
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| posted on 22/10/14 at 04:59 PM |
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Hi All,
During a quiet period I managed to get back to sorting out the fuel system (after nearly passing out due to too petrol vapour under the car!).
Anyway with a good face mask on replaced the fuel pump and filter under the tank (I did not want to do the job again so replaced both at the same
time). This time I used a decent Bosch fuel pump with a nice big filter. The old filter out it was very clean with no sign of any muck.
Anyway I went for a drive again this weekend and the same symptoms have returned   . The tank was 1/2 full...
Some other thoughts of the cause. When the car is cold, the pump sounds fine and I can hardly hear it (so this rules out the blocked tank etc) however
in this situation that injection system is taking plenty of additional fuel. When the car is warmed up and is running at low speed, even after
stopping for a short time, is when the symptoms return.
Could it be the pressure regulator that is faulty and not letting enough fuel through to keep the pump running efficiently and it is stalling which is
making the noise? The regulator looks like a Weber type. Do they go wrong and if so how can you test them?
I do not want to spend even more time and money chasing the problem without knowing it has a good chance of fixing my car!
Thanks
Alex
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AlexXtreme
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| posted on 22/10/14 at 04:59 PM |
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alexxtreme
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