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Thread: injector cooling

  1. #1
    Supporting Member II Turbo Mopar Contributor
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    injector cooling

    As part of my ECU research I want to test real injectors, low and high impedance on the bench in my electronic lab.
    My concern is how to cool them as I don't want to aspirate gasoline vapours into the house.
    Would compressed air running through the injector dissipate enough heat? Or would I need to switch to water?
    Ideas are welcome
    Last edited by chromguy; 03-31-2020 at 07:40 PM.
    Regards,
    Miles

    DD '87 Sundance T1, 12PSI, SLH with rear disks
    '87 CSX #432

  2. #2
    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: injector cooling

    You mean run compressed air through the injectors?

  3. #3
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    Re: injector cooling

    Quote Originally Posted by cordes View Post
    You mean run compressed air through the injectors?
    Yes thank you for pointing that out...post corrected
    Regards,
    Miles

    DD '87 Sundance T1, 12PSI, SLH with rear disks
    '87 CSX #432

  4. #4
    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: injector cooling

    If you don't have a decent water separator, I would think that using water would be just as good as the compressed air. I guess it depends on how long you run them for though. I don't think the cooling would be as good, but that would depend on the pressure differential I guess.

  5. #5
    Boost, it's what's for dinner... Turbo Mopar Staff Aries_Turbo's Avatar
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    Re: injector cooling

    run wd40 through them? no where near as stinky or dangerous as gas.

    Brian

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  6. #6
    Supporting Member Turbo Mopar Contributor Ondonti's Avatar
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    Re: injector cooling

    Do injectors really flow enough fuel for the fuel to act as a cooling agent? I would feel that vaporlock really starts at the high mass injector rather than the rail.
    Brent
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  7. #7
    Supporting Member II Turbo Mopar Contributor 85lebaront2's Avatar
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    Re: injector cooling

    Miles, back when my shop was a Holley carburetor service center and warehouse, the Holley rep told me they used Stoddard Solvent as it's flow characteristics were very similar to gasoline but not as flammable. Kerosine might work too. Whatever you do, come up with a safe collection system and a way to get the fumes from the spray safely collected and contained or vented to the outside. I would not use water as the injectors are not real happy with it.

    I would also suggest that rather then using a pump, use a suitable reservoir with a regulated compressed air supply so you can vary the pressure if needed. (too damn many years working in a laboratory doing strange tests for engineers)
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  8. #8
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    Re: injector cooling

    Quote Originally Posted by 85lebaront2 View Post
    Miles, back when my shop was a Holley carburetor service center and warehouse, the Holley rep told me they used Stoddard Solvent as it's flow characteristics were very similar to gasoline but not as flammable. Kerosine might work too. Whatever you do, come up with a safe collection system and a way to get the fumes from the spray safely collected and contained or vented to the outside. I would not use water as the injectors are not real happy with it.

    I would also suggest that rather then using a pump, use a suitable reservoir with a regulated compressed air supply so you can vary the pressure if needed. (too damn many years working in a laboratory doing strange tests for engineers)
    Thank Bill, yes I agree that mineral spirits should be good enough, I believe the injector rebuilder use this as well.
    Regards,
    Miles

    DD '87 Sundance T1, 12PSI, SLH with rear disks
    '87 CSX #432

  9. #9
    Supporting Member II Turbo Mopar Contributor 85lebaront2's Avatar
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    Re: injector cooling

    Let me know how it works and if you need some assorted injectors to play with.
    "growing old is inevitable, growing up is optional"
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  10. #10
    Supporting Member II Turbo Mopar Contributor
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    Re: injector cooling

    Quote Originally Posted by 85lebaront2 View Post
    Let me know how it works and if you need some assorted injectors to play with.
    Thanks!
    Regards,
    Miles

    DD '87 Sundance T1, 12PSI, SLH with rear disks
    '87 CSX #432

  11. #11
    Supporting Member Turbo Mopar Contributor "Top Fuel" Bender's Avatar
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    Re: injector cooling

    +1 on hearing that mineral spirits is good easy safe alternative on injector testing
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