SteveWallace
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| posted on 22/12/10 at 05:08 PM |
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Facet pump location
Hi,
I'm now putting the fuel system together to run a BMW 2.8 engine in my Viento I'm going for a swirl pot fed by a small facet pump for the
low pressure sided then a high pressure pump to the injectors.
However, I'm having a problem finding a suitable location for the low pressure pump. The obvious place would be along side the HP pump on the
chassis under the fuel tank (i.e. mounted horizontally), however, the destructions for the facet pump say that it has to be mounted pointing upwards
at a 45 degree angle.
Is it really necessary to set it up like this because it really restricts where it can go and adds complication to the fuel line runs? If so, where
have other people put them?
Link to the sort of pump is here:
Facet Solid State Replacement Fuel Pump 4.5 - 7 PSI on eBay (end time 21-Jan-11 14:34:10 GMT)
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mattyc
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| posted on 22/12/10 at 06:16 PM |
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Where are you planning on putting the swirl pot? at the back near the tank or up front in the engine bay?
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SteveWallace
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| posted on 22/12/10 at 07:06 PM |
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The plan is to put it at the back near the tank. There is a convenient corner close to the tank so the fuel line run to the HP pump and the return
line from the pot to the tank are quite short. The advantage of putting it at the back is that the runs to and from the LP pump should also be short
(if I can find somewhere to fit it!).
I'll take picture tomorrow to show the set up.
Steve
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rusty nuts
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| posted on 22/12/10 at 08:01 PM |
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Mounted mine on a bracket bolted to the top diff mounting plate, just a short length of hose connects it to the tank via a pre filter
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avagolen
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| posted on 22/12/10 at 08:36 PM |
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I know it is not a facet pump, but I mounted mine like this.
The pump came with a large 'P' clip and I adjusted it using the corner as a locating tab on the diff rear mounting point.
http://www.locostbuilders.co.uk/photos.php?action=showphoto&photo=Fuel_pump_mount_on_Diff.jpg
The Answer for everything, but never the last word....
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SteveWallace
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| posted on 22/12/10 at 10:57 PM |
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Thanks for the advice. Unfortunately, my fuel tank has extra volume by virtue of part of the tank extending towards the back of the diff. This does
not leave enough room to mount the pump as suggested.
Having read stuff on other forums, it seems that getting the pump below the level of the tank is more important than mounting it at 45 degrees or even
vertical. Therefore, unless someone has had a bad experience of horizontal mounting (I know what your thinking!!!), I think that I will give it a go
and see what happens.
What could possibly go wrong...
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paulf
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| posted on 22/12/10 at 10:59 PM |
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I have a red top pump , and it is mounted on the rear chassis next to the fuel pump so is just at about 10 or 15 degree angle and has been no
problem.I think that as long as the outlet is higher than the inlet to avoid an air or vapor lock then it will be fine.
Paul
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