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Do I need a bigger fuel pump to spray 150 shot?

Discussion in 'The Blower Bistro' started by True Blue 02, Jul 12, 2013.

  1. True Blue 02

    True Blue 02 Member Established Member

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    I need some info on spraying a 150 shot.. Do I need a bigger fuel pump? I will be adding luniti stage 2 high lift cams and upgrading the springs as well in a few weeks.. Any info would be great.. Thanks in advance
     
  2. CJ04GT

    CJ04GT 04 Oxford White Mach 1 Established Member

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    stock motor? stock fuel pump?
     
  3. True Blue 02

    True Blue 02 Member Established Member

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    Stock bottom end and fuel pump..
     
  4. khaos

    khaos Member Established Member

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    I spray a 150 shot with a BAP and a good tune. It's a NX wet kit.
     
  5. True Blue 02

    True Blue 02 Member Established Member

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    A BAP? Can you give me some info on that
     
  6. khaos

    khaos Member Established Member

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    I have an 03 cobra. Kenne Bell makes a " boost a pump" which allows you to boost fuel pump output.
     
  7. True Blue 02

    True Blue 02 Member Established Member

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    Oh ok.. Cool is there a certain one I need or do the only make one? Do they make it for different year models?
     
  8. flowgoode

    flowgoode F it! Established Member

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    They make 2 versions depending on how many fuel pumps you have.

    Boost-A-Pump
     
  9. TBCobra

    TBCobra Premium Member Premium Member Established Member Beer Money Bros.

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    I run a 150 shot on the stock fuel pump. Anything bigger and you probably would need an upgraded fuel pump(s).

    I havent given a bap any thought because I really dont know much about them.
     
  10. flowgoode

    flowgoode F it! Established Member

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    It basically gives your fuel pump a constant 17.5 or 21 volts compared to the stock 12-14 volts. So it makes your fuel pumps flow a lot more than the stock rating.

    So say you have a single Walbro 255 LPH pump:

    12.0 volts - 206 lph (Normal Car on battery no BAP)
    13.5 volts - 257 lph (Normal Car running no BAP)
    17.5 volts - 351 lph (Normal 40 amp BAP)
    21.0 volts - 440 lph (Race application BAP)

    Above numbers found here (pg 13): http://www.kennebell.net/KBWebsite/Common/pdfs/fuelpumptech.pdf
     
    Last edited: Jul 18, 2013
  11. TBCobra

    TBCobra Premium Member Premium Member Established Member Beer Money Bros.

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    Thanks for the info.

    So it can be used with a stock fuel pump? Will it change the duty cycle at all?
     
  12. spike_africa

    spike_africa New Member Established Member

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    A SVT Focus pump is a direct easy bolt in and provides plenty of fuel. Its what I use to feed my 125/150shot car.
     
  13. gnatsumarboc03

    gnatsumarboc03 Active Member Established Member

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    From what I understand, if your spraying a wet shot you should be good, but dry shot maybe extra measures should be taken, but i'm not 100%.

    I got a 100 wet shot pulling of the fuel rail. Stock fuel pumps, 60lbs injectors with a boost a pump. I'm new to this whole nitrous thing myself.

    Edit: I just realize you got a mustang gt so I'm not sure in your case.
     
    Last edited: Jul 19, 2013

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