Who Knows Kb Boost A Pumps?

Discussion in 'SN95 4.6L Mustang Tech' started by Mattstang04, Jul 29, 2013.


  1. Mattstang04

    Mattstang04 Active Member

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    I did some search through the archives and didn't find a good install thread about Boost a Pumps. I want to do one for my next mod.

    Can I run it constant instead of having it come on under boost? My tuner says that is how he wires them. Does anybody have any input on the install all together or wiring it on constantly? Also, what do I set the variable switch to right after the install or does the car need a retune once it is installed?

    Let me know what I need to do before jumping into the project. Thanks
     
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  2. 99Blownstang

    99Blownstang Member

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    Mine doesn't have the variable switch. I still have my install book. I can take photos of the pages showing the install and send them to you if you like
     
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  3. trinity_gt

    trinity_gt Advanced Member

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    Mine's wired to run constantly. The PCM is able to compensate for the added pump capacity by reducing the duty cycle off-boost. The BAP, as far as I know, has no issues being configured this way.

    I also don't have any adjustment knob. Probably just as well...
     
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  4. Mattstang04

    Mattstang04 Active Member

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    So is the way to wire it constant where you take the one certain lead off the BAP unit and loop the connections together at the end?
     
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  5. 99Blownstang

    99Blownstang Member

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    I'm not for sure. I'm at work now, I'll look in the morning when I get home
     
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  6. Mattstang04

    Mattstang04 Active Member

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    Awesome. I appreciate it. Im not a fan of cutting into wiring, so I want to know as much about it as possible before going in.
     
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  7. 99Blownstang

    99Blownstang Member

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    No problem. Hopefully I can help
     
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  8. Nightfire

    Nightfire Mustang Master

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    I recommend wiring the BAP in pre-FPDM (not running constantly). That way, the ECU completely controls the BAP and increases/decreases voltage based on what the motor needs fuel-wise. In some applications, wiring the BAP in post-FPDM (having the BAP running constantly) have resulted in burned-out FPDM's. The ECU knows what's best for the engine and therefor that is what I want controlling my BAP. I also recommend a wiring upgrade. Its cheap and adds a security buffer.
     
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  9. cobrabuck

    cobrabuck New Member

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    Is there a reason why you would want it in the constant format? The trunk install is pretty simple unless they changed it from the last time I did it.
     
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  10. Mattstang04

    Mattstang04 Active Member

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    My reasoning on running constant is that when the BAP is controlled by the ECU, the sudden surges of extra voltage would be harmful to the fuel pump. With a more consistent flow of power, even if its a larger amount, theres no spike in voltage and hopefully less impact on the life of the pump. That is how my tuner explained it to me.
     
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  11. cobrabuck

    cobrabuck New Member

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  12. Mattstang04

    Mattstang04 Active Member

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    Just found out about the upgraded wiring for BAPs in another thread. Its purpose is to ensure no drops or spikes in voltage. Thats a winner.
     
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