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p28 vs. p72

Discussion in 'HYBRID -> ED-EF / DA' started by russianswty, Dec 7, 2006.

  1. russianswty

    russianswty Junior Member

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    Whats the differance between the two ecu's.

    Are the pinouts the same?
     
  2. CRX-YEM

    CRX-YEM Super Moderator Moderator VIP

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  3. russianswty

    russianswty Junior Member

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    refrase that

    Ok let me refrase that, whats is the difference between the p28(obd1) and the
    p72(obd1) ecu's. Besides the fact that one came from a d16z6 motor and one
    came from a b18 vtec motor.

    Does anybody know any hard facts?
     
  4. K2e2vin

    K2e2vin Senior Member

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    P72 is pretty much the same but has IAB and knock sensor board.
     
  5. russianswty

    russianswty Junior Member

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    knock sensor

    To my knowledge all a knock sensor is for is that I can run 87 oct gas safely in a better engine (being the gsr).

    But if im always running 92, I should be fine right?

    But is there anyway to get that knock sensor to work with the p28 in my ef
    with a ls/vtec?

    :)
     
  6. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    you dont need the knock sensor. you can disable it in both Crome and Hondata, so if you plan on running a p28, just disable it.
     
  7. russianswty

    russianswty Junior Member

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    sensor

    well what exactly is the knock sensor for?
    and yeah I will be running hondata, just not now I want to save up and get
    the s300 for a wapping $595.
     
  8. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    knock sensor detects abnormal vibrations in the combustion chamber (usually caused by early combustion).
     
  9. K2e2vin

    K2e2vin Senior Member

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    knock sensor detects knock/detonation. When it does, it runs your car rich, reduces timing,... runs it in limp mode(VERY weak). As long as your car is tuned correctly, you don't need the knock sensor.

    If you're going to spend that much on an ECU, might as well get Megasquirt/VEMS. Neptune is also a good option.
     
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