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Kenne Bell boost a pump

Discussion in 'Engine/Tuning' started by Palacios289, May 16, 2019.

  1. Palacios289

    Palacios289 Member Established Member

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    I have a boost a pump that I am ready to install pre-FPDM. My Cobra has 2.76 pulley, CAI, X Pipe and catback. My boost a pump is the later one that I believe is fixed at 17 volts. Do I need to retune for this BAP or does the PCM adjust on its own?
     
  2. slo984now

    slo984now AKA 01yellerCobra Established Member

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    The tune will need to be tweaked. Are your pumps maxed?
     
  3. Palacios289

    Palacios289 Member Established Member

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    Slo984, I’ve seen as high as .98 fuel injector duty cycle on my SCT. I’m adding ported blower soon so I figure I’d be maxing out. I do have 60lb injectors if that matters.
     
  4. slo984now

    slo984now AKA 01yellerCobra Established Member

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    Injector duty cycle is different than fuel pump duty cycle. And you shouldn't be any where near the max on injectors. I tuned a buddies car with a stage 4 port and the 60's were good. But the pumps were done. I think it was the mileage though. Close to 200k on them I think.

    I'd datalog the FPDC and see where you're at. Another issue might be the injectors are staying open longer to make up for lower fuel pressure. Which could be cause by a dying pump. If that's the case you're better off upgrading instead of overdriving a dying pump.
     

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