"The BIG BOV thread" (Where all bov question threads get merged) - Page 15
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This is a discussion on "The BIG BOV thread" (Where all bov question threads get merged) within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; I think most ppl plan to put quite a lot of mod to the rex, so having an EGT gauge ...

  1. #211
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    I think most ppl plan to put quite a lot of mod to the rex, so having
    an EGT gauge early is like having insurance.

    I heard if you go over 1650 F it is bad. The uppie is the one that
    reduce EGT since the pre-cat is on longer there to trap the heat.
    Even old school hot rod put EGT on their V8 just to make sure
    everything is COOL
    What mods, dude this baby is stock
    2002 Platinum Silver 5spd sedan.

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  3. #212
    Moderating on the run! Big Sky WRX's Avatar
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    An uppipe will certainly reduce egt's, but there is still potential w/ a MBC to have significant egt's. Even w/ the early Tuboxs unichip there was problems w/ high egt's in certain conditions. High egt's are an indicator of something bad happening (like your motor frying), w/o an egt gauge you will not know until too late.

    Obviously a MBC set to a reasonable rate (15ish) and having a catless uppipe will reduce your chances of catastrophic events related to egt's, but probably not completely eliminate it. EGT gauge is just insurance.

    My .02

    Big Sky

  4. #213
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    thanks for the input

    heres my short term plan/setup

    all i am going to do is CAI, MBC (set 15-15.5 4th gear), and a totally catless system

    do you think thats a safe setup without EGT gauge?


    eventually ill take it to God for the $7000/320 HP package



    todd
    Silver 2002 WRX...far from stock

    An error made on your own is safer that ten truths accepted on faith, because the first allows you the means to correct it, but the second destroys ones ability to distinguish truth from error.--Ayn Rand

    That which has been is that which will be, and that which has been done is that wich will be done-so there is nothing new under the sun.-Solomon

  5. #214
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    Yea...I am sure its fine...but when I deal with car parts...i like to have something new. I mean say you need to contact someone about it malufunctioning....say you need to get a spring replaced...I doubt that it will fly with them being that its a second party item now. Funny you should ask about the GFB....i just ordered one yesterday from vivid.

  6. #215
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    I just purchased the Turboxs stage 1 unichip, and prior to the purchase I invested in some gauges. I purchased the greddy electrical EGT gauge. My question is where to install the sensor and does anyone have instructions.


    Derrek
    Last edited by Drod; 04-16-2002 at 12:13 PM.

  7. #216
    Moderator TypeC's Avatar
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    Re: Jim and other current MBC users

    Originally posted by BamBooI
    How have you solved your part throttle full boost situation causing high egt's?
    yeah, all you have to do is blip the throttle to WOT for a sec and it'll go to full rich (how is runs during WOT) for a good bit. If you have an A/F gauge, you can see this happen. You can also see the car go lean during part throttle full boost situation just as your car starts to studder.

    in addition to that, it's pretty easy to just not make full boost at part throttle. Either give it less gas (to lower the boost), or more gas (To make it add fuel).

    hth, -C
    Street Racer Emeritus
    '02 2.5L WRX - Retired

  8. #217
    Moderator Penguinking's Avatar
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    wouldn't a unichip solve the problem of the engine running rich at WOT?

  9. #218
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    Well my dwaes FBC/MBC trigger works like a charm.

    Normal setting is FBC which is normal drivable in everyday highway
    traffics.

    Switched on I get 16 PSI So it is almost like NOS. hahahah
    What mods, dude this baby is stock
    2002 Platinum Silver 5spd sedan.

  10. #219
    Registered User michaelwrx's Avatar
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    Originally posted by WRXrumble
    Well my dwaes FBC/MBC trigger works like a charm.

    WRXrumble, can you tell me a bit more about your dawes device. Is it a custom design or can we all get it easily?

    MichaelWRX
    01 WRX World Rally Blue

  11. #220
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    I use boostvalve MBC which is getting the boost off the factory BOV.
    This eliminated the problem of pressure cross feeding if you try to
    run the FBC and MBC off the same source.

    http://www.boostvalve.com wrx kit.
    http://www.dawesdevices.com/solenoid.html

    You install the boostvalve MBC as instructed and set it at 16psi on
    3rd. Now install the solenoid this way
    What mods, dude this baby is stock
    2002 Platinum Silver 5spd sedan.

  12. #221
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    This is the wiring diagram
    Attached Thumbnails Attached Thumbnails dawes.jpg  
    What mods, dude this baby is stock
    2002 Platinum Silver 5spd sedan.

  13. #222
    Registered User michaelwrx's Avatar
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    Thanks I already have the Boostvalve MBC but I have it hooked slightly differently to the instructions.

    Rather than connecting to BOV and turbo, I have it connected to the BOV and the wastegate. I simply stuck a screw in the hose that used to be connected to wastegate. All works fine but If I bought this switch I can see I would need to hook up properly
    01 WRX World Rally Blue

  14. #223
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    So far you have connected correctly. The hose you just plugged
    will go to the normallly open end, add a small hose from the
    solenoid (center outlet) and connect that to the wastegate. The MBC
    connects to the normally closed end ( the one that is air tight when no
    power is applied, test the solenoid and you will see what I mean).
    Now wire the solenoid and you are all set.

    I am now going to add a NOS trigger to the throttle body to switch
    the solenoid on after 3/4 throttle (just like a NOS setup ).

    This way the toggle will be used as a velet switch hehhe

    Btw I found running MBC with half throttle/full boost condition is
    totaly bad in NJ rush horr traffic, so I decided to add the solenoid.
    Now I can drive normal in rush hour traffic and not worry

    Have fun and email me if you need more info.
    What mods, dude this baby is stock
    2002 Platinum Silver 5spd sedan.

  15. #224
    Moderator Penguinking's Avatar
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    i know alot of tuners arent messing w/ the bov cause it (loses?) power? i know vishnu wont mess w/ the stock bov cause they say it works well. how much of a loss are u experiencing with...oh say, a turboxs bov or aps bov?

  16. #225
    Tas
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    Question Why lose power?

    I was just wondering how a BOV causes a loss in power. Does anyone know? And I heard a 100% atmosph. BOV is better than a 50/50. Am I correct?

    Thanks,
    Tas
    "Never let school get into the way of your education."

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