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Mishimoto expansion tank compatibility

Discussion in '5.2L V8 Voodoo Engine Mods & Bolt-Ons' started by madweazl, Jun 22, 2020.

  1. madweazl

    madweazl Well-Known Member

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    Can the passenger side FP oil/air separator be used with the Mishimoto expansion tank?
     
  2. raiderjatt02

    raiderjatt02 Well-Known Member

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    Yes it can. It's a tight fit and I have to loosen the expansion tank to move it out of the way every time I empty the catch can but it fits without any issues. I've had it on for 4 years and it's held up to lots of abuse. No issues at all.

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  3. OP
    OP
    madweazl

    madweazl Well-Known Member

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    Bummer. I had it on my '15 GT and liked it a lot so it was the first thing I did to the '19. I'll look into a different oil separator though.
     
  4. CobraCommander

    CobraCommander Active Member

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    Seems like that setup would potentially create false knock with those items being so close together?
     
  5. gameovergt

    gameovergt Kevin

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    I put Velcro on my catch can to keep the metals apart.
     
  6. raiderjatt02

    raiderjatt02 Well-Known Member

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    False knock? Do you mean it might make a knocking type sound from the vibrations? If that's what you're thinking, I can assure you that they don't move at all and don't make any sounds. It's a tight fit but it's sturdy and I haven't had any issues. The only issue is how annoying it is to empty.

    If I misunderstood you, what do you mean by "false knock"?
     
  7. Slopoke

    Slopoke Well-Known Member

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    I do believe your first sentence is the "false knock" he was referring to.
     
  8. CobraCommander

    CobraCommander Active Member

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    Yes, what you indicated first is what I was referring to in relation to potentially causing false knock to occur if those banged together while driving. The factory knock sensors can be pretty sensitive so anything hitting together can potentially cause that and have the computer pull timing thinking that the car is knocking when it's really not.
     
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  9. raiderjatt02

    raiderjatt02 Well-Known Member

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    Ahh okay got it. I didn't think that could affect the knock sensors. I'm pretty sure it's not doing anything like that though because it's been installed for so long and I've done quite a few track days without any issues or feelings of pulled timing. The car still pulls hard af all day long on track. The catch can is up against the overflow tank so tightly that it doesn't rattle or shake at all.
     
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