Nitrogeno25
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| posted on 12/8/12 at 07:18 PM |
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Fuel pump restriction and fuel line size
I'm using a Bosch external fuel pump from an Peugeot. It flows (according to Bosch) 130l/h.
The pump output ID is about 1/4" (6mm), so I was thinking what's the point in using 3/8 fuel lines (bigger) or even trying to source a
fuel filter with 3/8 inlet and outlet when the pump has the main restriction at the output.
I read somewhere that this pump is capable of supporting 350bhp.
What do you think?
Many thanks!
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tomgregory2000
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| posted on 12/8/12 at 08:16 PM |
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I don't think that will be upto the job
I would fit a Bosch 044 Motorsport pump
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Nitrogeno25
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| posted on 12/8/12 at 08:50 PM |
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quote:
Originally posted by tomgregory2000
I don't think that will be upto the job
I would fit a Bosch 044 Motorsport pump
Sorry, I'm looking for 180bhp, I think the pump should work. The 350bhp rating is for reference only.
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Brook_lands
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| posted on 12/8/12 at 08:56 PM |
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In theory it should be just about up to it if it is delivering 130 l/hr. Depends on engine efficiency but in theory you need about 227g of petrol per
hour to create 1hp in a normally aspirated engine. For 350bhp you need 79.5kg per hour. With petrol at 0.711kg/l this is 112 litres per hour of fuel
required.
Remember that there will be pressure losses in the system so even if the pump is capable of delivering 130 l/h by the time the fuel has been sucked
out of the tank and pushed to the engine, the quantity delivered will be less. Even though the pump outlet is 1/4" dia using larger diameter
pipe work for the rest of the system would result in lower losses than using 1/4" throughout.
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richmars
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| posted on 12/8/12 at 09:32 PM |
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Don't forget that the pressure drop isn't just to do with the diameter of the tube, the length plays a role as well, so for a long length
of tube, use as big a diameter as possible.
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