Paul (Notts)
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| posted on 21/9/09 at 06:24 PM |
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fuel supply for injection conversion
In the process of converting to Megasuirt and EFI.
I currently have a low pressure pump supplying the engine bay at 6psi and a good flow rate.
instead of removing all the low pressure system and fitting a high pressure pump and return via the tunnel could I have some sort of tank / swirl pot
fitted at the front and run a high pressure pump from that.
if so what sort of container do I need.
+ the injectors run from two fuel rails as in the diagram. can I get a regulator that will work as in the diagram
Paul
 
Rescued attachment fuel.JPG
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clairetoo
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| posted on 21/9/09 at 06:27 PM |
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The high pressure pump should feed into one end of the rail , then to the other rail , with the pressure regulator on the other end (the return to the
swirl pot)
And maybe a return from the top of the swirl tank ?
[Edited on 21/9/09 by clairetoo]
Its cuz I is blond , innit
Claire xx
Will weld for food......
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Paul (Notts)
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| posted on 21/9/09 at 06:30 PM |
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The injection system is a rover v8 thor manifold and the injectors have one feed in only as in the diagram.
Paul
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flak monkey
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| posted on 21/9/09 at 06:31 PM |
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What claire said.
Feed from low pressure pump goes into one side of the sirl pot
Return from rail goes via regulator to the other side entry.
Top connection goes back to tank
Bottom conntection gravity feeds high pressure pump.
David
Sera
http://www.motosera.com
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MikeRJ
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| posted on 21/9/09 at 06:32 PM |
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quote:
Originally posted by Paul (Notts)
instead of removing all the low pressure system and fitting a high pressure pump and return via the tunnel could I have some sort of tank / swirl pot
fitted at the front and run a high pressure pump from that.
The trouble is with no return to the tank from the swirl pot, there is no way for any air to get out of the swirl pot apart from the injectors.
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clairetoo
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| posted on 21/9/09 at 06:35 PM |
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quote:
Originally posted by MikeRJ
The trouble is with no return to the tank from the swirl pot, there is no way for any air to get out of the swirl pot apart from the injectors.
Also with no through flow on the fuel rails , all the air has to go out through the injectors from the high pressure system , thats why its normal to
have the return from the opposite end of the rail .
Its cuz I is blond , innit
Claire xx
Will weld for food......
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Paul (Notts)
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| posted on 21/9/09 at 06:49 PM |
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The fuel rail does have a bleed valve to remove initial air pockets.
The main question seems to be answered, I can use a swirl pot and run a high pressure pump at the front.
May well have new fuel rails made up to form a loop system vial a reg to the return
Any ideas of the cost for two fuel rails for a RV8 flak monkey?
Paul
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flak monkey
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| posted on 21/9/09 at 06:53 PM |
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quote:
Originally posted by Paul (Notts)
The fuel rail does have a bleed valve to remove initial air pockets.
The main question seems to be answered, I can use a swirl pot and run a high pressure pump at the front.
May well have new fuel rails made up to form a loop system vial a reg to the return
Any ideas of the cost for two fuel rails for a RV8 flak monkey?
Paul
I have literally just ordered some fuel rail blank from the US - too late to add some more to the order now sadly.
I will do another order in the future if there is interest.
You will need a 4' length to do a RV8 i should think (though I made 2 off 4 pot rails from a 3' length)....
If so you would be looking at around the £100 mark for a pair, drilled to suit injectors and with 8mm hose connections supplied. You would need to fit
brackets 
David
Sera
http://www.motosera.com
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Paul (Notts)
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| posted on 21/9/09 at 06:54 PM |
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will keep this in mind.
Thanks
Paul
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clairetoo
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| posted on 21/9/09 at 06:58 PM |
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Whatever you do , dont buy it
from this shark 
Its cuz I is blond , innit
Claire xx
Will weld for food......
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flak monkey
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| posted on 21/9/09 at 07:00 PM |
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quote:
Originally posted by clairetoo
Whatever you do , dont buy it
from this shark
I must be too cheap  
That really is taking the pi55!!
Sera
http://www.motosera.com
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Werner Van Loock
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| posted on 21/9/09 at 07:04 PM |
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This is what I'd do and plan to do for the 4age (but with only 1 fuel rail off course)
 
injection
[Edited on 21/9/09 by Werner Van Loock]
http://www.clubstylus.be
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Dusty
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| posted on 21/9/09 at 08:28 PM |
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I think you can get away with a single feed to the rail although it's not ideal. Not going to be a problem when running but you will have vapour
and air problems at start-up which can only escape the rail through the injectors. Much better to have the regulator under the bonnet immediately
after the rail.
 
Rescued attachment 2injection.jpg
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