I need to uprate my fuel pump, which is currently supplying 90l/h. I found a formula on a web site that says:

I'm having a right 'Susan', If my pump delivers 90l/h would this not be 90,000cc/h and therefore this would equate to 90,000/60=1,500cc/min? and if you apply this to the formula, 1,500/5.6=267hp, this can't be right!! Or can it? Am I applying the formula wrongly? Does this mean I don't have to uprate my fuel pump?

*In order to calculate whether your pump is up to the current or planned horsepower output use the following formula:*

Fuel Flow (cc min) = HP x K

K = 5.6 for forced induction and 4.6 for Naturally Aspirated engines

You might like to work the other way round and see how much power your pump can deliver. If you had a 130hp N.A engine and you wanted 180 hp and you know the pump delivers 644cc a minute what power would the pump supply.

Fuel Flow / K = HP so for N.A engine this pump will deliver 140 hp.Fuel Flow (cc min) = HP x K

K = 5.6 for forced induction and 4.6 for Naturally Aspirated engines

You might like to work the other way round and see how much power your pump can deliver. If you had a 130hp N.A engine and you wanted 180 hp and you know the pump delivers 644cc a minute what power would the pump supply.

Fuel Flow / K = HP so for N.A engine this pump will deliver 140 hp.

I'm having a right 'Susan', If my pump delivers 90l/h would this not be 90,000cc/h and therefore this would equate to 90,000/60=1,500cc/min? and if you apply this to the formula, 1,500/5.6=267hp, this can't be right!! Or can it? Am I applying the formula wrongly? Does this mean I don't have to uprate my fuel pump?

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