MK9R
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| posted on 8/12/10 at 09:49 AM |
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High pressure fuel pump install query
Due to engine upgrade from 919 blade to 06 R1, I'm having to fit a high pressure pump for the R1, i really don't want to replace the tank
and have the original R1 pump with the engine. This type of pump requires the return pipe from the fuel rail. I was thinking of fitting a swirl pot in
the engine bay, and using the original blade pump and piping from the tank to fill this pot, with the high pressure pump fitted inside it with the
in/out pipes connected to the fuel rail. This obviously means the swirl pot has to be filled by the blade pump, which cuts out at a low pressure. My
concern is that trapped air in the swirl pot will mean that the blade pump cuts out before its anywhere near full. Am i barking up bthe wrong tree
with this idea, or is this waht others have done? Should i just buy a regulated high pressure pump and stick in inplace of the blade pump?
If going for a new pump, what pressure does the R1 require??
Cheers Austen
RGB car number 9
www.austengreenway.co.uk
www.automatedtechnologygroup.co.uk
www.trackace.co.uk
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richard thomas
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| posted on 8/12/10 at 09:56 AM |
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Use the blade pump to feed the swirl pot from the tank, then have the swirl pot feed a high presure pump - sierra efi or similar. Have the return from
the fuel rail feed back to to the swirl pot via a pressure regulator set at the R1 fuel operating pressure. Return line from the swirl pot to the
tank.
Mine works ok like this...
[Edited on 8/12/10 by richard thomas]
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MK9R
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| posted on 8/12/10 at 10:02 AM |
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quote:
Originally posted by richard thomas
Use the blade pump to feed the swirl pot from the tank, then have the swirl pot feed a high presure pump - sierra efi or similar. Have the return from
the fuel rail feed back to to the swirl pot via a pressure regulator set at the R1 fuel operating pressure. Return line from the swirl pot to the
tank.
Mine works ok like this...
[Edited on 8/12/10 by richard thomas]
I was trying to relieve the need for 2 pipes between the swirl pot to the tank. I reckon i could get away from using the swirl pot altogether if i
bought a self regulating high pressure pump. Just need to find out the pressure needed for the R1
Cheers Austen
RGB car number 9
www.austengreenway.co.uk
www.automatedtechnologygroup.co.uk
www.trackace.co.uk
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richard thomas
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| posted on 8/12/10 at 10:34 AM |
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Just for note, a swirl pot is an extra insurance against fuel starvation....dependant on how well your tank is baffled....
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MK9R
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| posted on 8/12/10 at 10:57 AM |
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quote:
Originally posted by richard thomas
Just for note, a swirl pot is an extra insurance against fuel starvation....dependant on how well your tank is baffled....
I've never had a problem with fuel starvation, the tank has small baffled scavenge pot at the bottom were the fuel outlet is
If i run an aftermarket fuel pump will i need a pressure regulator?
Cheers Austen
RGB car number 9
www.austengreenway.co.uk
www.automatedtechnologygroup.co.uk
www.trackace.co.uk
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britishtrident
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| posted on 8/12/10 at 11:08 AM |
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You will run into fuel starvation injection needs continuous flow, with carbs the float chambers act as a reservoir and escape route for air
bubbles.
Your return/vent between the swirl pot and the tank can go into the filler neck pipe.
[Edited on 8/12/10 by britishtrident]
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PAUL FISHER
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| posted on 8/12/10 at 11:36 AM |
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Just keep it simple, replace your blade pump with a high pressure pump, the injected R1 requires fuel pressure of around 45 psi pressure to be
maintained, then run a return pipe back to the tank from the fuel regulator on the fuel rail.
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MK9R
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| posted on 8/12/10 at 11:40 AM |
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quote:
Originally posted by PAUL FISHER
Just keep it simple, replace your blade pump with a high pressure pump, the injected R1 requires fuel pressure of around 45 psi pressure to be
maintained, then run a return pipe back to the tank from the fuel regulator on the fuel rail.
one of these http://search.ebay.co.uk/120657792081 (as used by fellow R1'er RGBer) inplace of the blade pump with a return line to the tank.
Thats actually the cheapest option!!!
Cheers Austen
RGB car number 9
www.austengreenway.co.uk
www.automatedtechnologygroup.co.uk
www.trackace.co.uk
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PAUL FISHER
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| posted on 8/12/10 at 11:45 AM |
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Yes, looks just the job
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adithorp
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| posted on 8/12/10 at 01:32 PM |
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Do you have baffles or a well in the tank? If not you could get starvation problems in a race when running only enough fuel for the distance.
Otherwise I'd keep it simple;Less to go wrong that way.
I'm running without swirl pot and just high presure pump from an Escort RS Turbo. I do get starvation when almost empty on track days but that
would be improved if the return went into the well instead of the top of the tank.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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mark chandler
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| posted on 8/12/10 at 10:42 PM |
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I tried running with a LP pump feeding my swirl pot, the HP pump being 'closed circuit', the swirl pot emptied itself over a few miles.
Cavitation creates air bubbles with the HP pump these gradually fill the system and it runs dry, I succumbed and fitted a return for the LP pump at
the top of the swirl pot to bleed off air, this sorted it.
[Edited on 8/12/10 by mark chandler]
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BobM
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| posted on 9/12/10 at 06:34 AM |
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Hi Austen
My setup was with a Facet low pressure pump feeing a swirl pot in the engine bay with a return back to the tank. The Busa injection pump then took a
feed from the swirl pot with the return from the fuel rail going back to the swirl pot. This setup worked fine until I changed to the in-tank
injection pump which as you know sits in a swirl pot above the fuel tank at the back of the car with a single pipe feeding the fuel rail. This has
also worked OK.
The pump Dan suggested looks good value but I'd be wary of running it without some form of swirl pot/sump.
Not very Locost but very BEC 
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