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Thread: Installing An Aftermarket Blow Off Valve - 1JZ

  1. #1
    Toymods Club Member Domestic Engineer Danners's Avatar
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    Default Installing An Aftermarket Blow Off Valve - 1JZ

    Hi Guys,

    My stock blow off valve on the 1J sounds as though its possibly leaking, and I have an aftermarket Blitz BOV ready to go on. I'm not really sure where to go from here. The blitz one is on a metal pipe, bolted onto a flange at the moment. How do i go about hooking it up?

    Probably the easiest thing is for people to post pictures of their aftermarket BOV setups? I would much appreciate it!

    Cheers
    Dan

  2. #2
    jzx100 fan boy Domestic Engineer slide86's Avatar
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    Default Re: Installing An Aftermarket Blow Off Valve - 1JZ

    you need to put it in the cooler lines. either between the turbo and the cooler, or the cooler and the throttlebody.

    there will be a hose on the other end, or a nipple for a hose to go onto. this hose needs to go onto the plenum chamber, so that it has vacum when the throttle is closed. this is what actuates the valve and makes the fully sic dorifto ptttttsssssscccchhhhh noise
    Quote Originally Posted by The Witzl
    Please visit here, they will have all the answers you need for this "conversion" - www.hot4s.com.au

  3. #3
    Toymods Club Member Domestic Engineer Danners's Avatar
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    Default Re: Installing An Aftermarket Blow Off Valve - 1JZ

    So its fairly impossible to do without getting custom IC piping? (i'm just running the standard plastic at the moment)

    Do I leave the standard BOV in its place and remove the vacuum hose from it so that it stays shut when the Blitz one is installed?
    Dan

  4. #4
    Junior Member Conversion King TheStitt's Avatar
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    Default Re: Installing An Aftermarket Blow Off Valve - 1JZ

    you would have to take the old valve out or leave it hooked up as without a reference pressure it will stay open me thinks
    ST177 UZS131 Crown Royal 'G' the pimping limo like daily 1UZFE 144rwkw

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  5. #5
    JZ Powered Too Much Toyota EldarO's Avatar
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    Default Re: Installing An Aftermarket Blow Off Valve - 1JZ

    it has to have the same pressure/vaccuum on both sides of the valve (in both the big port, and the little vac line) in order to stay shut.

    your best bet is removing the stock BOV and putting yours in its place.

    that said, i know this is possible on 7MGTE, but i dont know about 1J.

    Eldar.O.

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