Nitrogeno25
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| posted on 16/2/12 at 04:07 PM |
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Injector and fuel pump sizing
For my Duratec installation:
I got 250cc/min injectors and aiming for 160-170bhp.
Am I OK in thinking that at 100% duty cycle (it shoudn't be), 4 injectors equals to 1 liter/min. So a fuel pump capable of 60l/hour in theory
should be enough.
I'm after a 105 l/h fuel pump (Bosch in-tank). That 60% is a good safety factor? Maybe for reaching 200bhp with some later upgrades?
Many thank!
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matt_gsxr
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| posted on 16/2/12 at 09:46 PM |
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Those numbers add up correctly to me.
Sounds like a good plan.
Just as an aside.
If you increase the fuel pressure above the standard 3atm, then you can get more flow out of the injectors (if you need it), but this reduces the fuel
pump flow-rate (at least for the walbro ones).
Matt
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Nitrogeno25
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| posted on 17/2/12 at 11:22 AM |
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quote:
Originally posted by matt_gsxr
Those numbers add up correctly to me.
Sounds like a good plan.
Just as an aside.
If you increase the fuel pressure above the standard 3atm, then you can get more flow out of the injectors (if you need it), but this reduces the fuel
pump flow-rate (at least for the walbro ones).
Matt
Thank you very much!
So it seems OEMs use way oversized pumps. This model is used in VW 1.0 and 1.6L engines (70hp and 90hp)!
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coyoteboy
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| posted on 17/2/12 at 11:54 AM |
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Probably just bulk-buy a mid-range pump and use it for all - saves hugely on manufacturing costs.
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Nitrogeno25
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| posted on 1/3/12 at 04:26 PM |
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I've just receive a response from Webcon about their in tank fuel pump rated at 75l/h and they told me they recommend the pump up to 250bhp
It seems every car manufacturer use way oversized fuel pumps, we will see....
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coyoteboy
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| posted on 1/3/12 at 05:08 PM |
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Fairly well spec'd for 200+ KW, with some FOS, at 75 l/h.
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