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984 is around 300rwkw

044 is around 400rwkw

040 would be close to 984 in output, so it could be droping at 260rwkw if thats a low reading dyno.

best bet is to use a standard pump or the 040 to feed a surge tank and use either single external 044, or twin external 984's.

have you had a pressure and flow guage on it to confirm the flow is dropping at max power?, you could have a restrictive ot blocked filter etc...

The 040 flows 220-240L per hour which should support somewhere in the vacinity of 400-500hp.

I'm getting 450hp on one that is 3 years old at the moment. Are you sure it's the pump that has failed? I have seen regulators fail in the same way....rare....but can happen.

  • 3 weeks later...
The 040 flows 220-240L per hour which should support somewhere in the vacinity of 400-500hp.

I'm getting 450hp on one that is 3 years old at the moment. Are you sure it's the pump that has failed? I have seen regulators fail in the same way....rare....but can happen.

well i put a 280l/h sard intank pump in today and run 302rwkw before it ran out of fuel also. that works out at about 550 flywheel horsepower, which is about right. 260 rwkw works out at about 470fwhp which is also about right for the 040. so i guess i have learn't alot about fuel pump limits during this build. what pumps are other people running?

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