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Is there anyone out there that can convert a Classic FAST B2B to Sequential

Discussion in 'EFI Tuning Questions and Engine Management' started by comecorrect, Oct 8, 2010.

  1. comecorrect

    Joined:
    Oct 27, 2003
    Do anyone still have parts to convert to sequential?
    Firmware: B2BUNV-E Thanks!
    MIKE
     
    comecorrect, Oct 8, 2010
    #1

  2. TurboNova

    Joined:
    Jun 18, 2004
    Craig on this forum can. If he still has the parts
     
    TurboNova, Oct 8, 2010
    #2

  3. Craig Smith

    Joined:
    Sep 17, 2003
    I sent you a PM too, let me know if interested. Thanks.
     
    Craig Smith, Oct 11, 2010
    #3

  4. mostdef

    Joined:
    Apr 24, 2009
    what are the benefits to doing this?? should i do that to my old grey fast system?? thanks
     
    mostdef, Oct 13, 2010
    #4

  5. comecorrect

    Joined:
    Oct 27, 2003
    I sent you an e-mail and PM. Thanks!
    MIKE
     
    comecorrect, Oct 16, 2010
    #5

  6. Wanderer

    Joined:
    Apr 8, 2004
    Primary benefits of going to a sequential fuel system are...
    1) Individual cylinder fuel control. If the outsides run lean, you can richen them up. If one cylinder runs too rich, you can trim it back.
    2) If done right, you can get a "stock-like" idle using 160lbs injectors
    3) It's one more shiny badge you can brag about.

    Like anything though, it requires the right tools to see which cylinder is giving you the biggest hassle.
     
    Wanderer, Oct 17, 2010
    #6

  7. TurboNova

    Joined:
    Jun 18, 2004
    You are correct Wanderer but what most people miss, you will also have more available duty cycle because you are firing the injectors 1/2 as many times in the cycle. The big one... You now fire the injector at the correct time in the firing order.
     
    TurboNova, Oct 17, 2010
    #7

  8. Craig Smith

    Joined:
    Sep 17, 2003
    I've had at least one guy I converted tell me he made more power, although this is not typical in my experience, nor do I like to tell people that there is power on the table because I don't understand why there would be. But nobody minds when there's more power, that's for sure! :D

    It's mostly about big hp per CID using huge injectors that are tough to tune for idle. Especially if it does any driving... the B2B setup is just tough in these cases because dividing an already miniscule pulse into two halves makes low-speed fuel control very poor.

    I also would not say there is more available duty cycle - I think I understand the concept behind the statement but in the end, static is static. Even if fuel delivery for a given combustion cycle is split into two halves, 100% is still 100% and the injector still never shuts off in that case. The two injector pulses are not separated by an "off time" in a static condition - they are always on.

    However, B2B fueling strategies do allow for injector control above 85-90% to be less accurate because that off time between pulses in that situation become increasingly difficult to perform as duty cycle and RPM go up.

    :cheers:

    Craig
     
    Craig Smith, Oct 22, 2010
    #8

  9. EFI fox

    Joined:
    Nov 5, 2006
    What is the cost for converting. I have a new in the box classic fast B2B.
     
    EFI fox, Oct 30, 2010
    #9

  10. turbodgumby

    Joined:
    Mar 28, 2007
    X2
     
    turbodgumby, Oct 31, 2010
    #10

  11. Craig Smith

    Joined:
    Sep 17, 2003
    I do them for $350 plus shipping.
     
    Craig Smith, Oct 31, 2010
    #11
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