EGR ------ Delete

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    Moderator/Troll Slayer SupraTrey's Avatar
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    EGR ------ Delete

    Who here as disabled their EGR system? Not only just the block off plate but tapping the rear of the head as well. I am not worried about emissions and this will clean up my engine bay tremendously. No more BS vacuum lines. Does anyone have any pics? Anyone have any issues tapping the aluminum head? I know you need to drill it out slow as its aluminum but curious on results. Anyone try to pass emissions after doing a EGR removal?

    Thanks!

    Trey

  2. #2
    ZOOM ZOOM CALLE BlackDawg's Avatar
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    i have done it...but idk what your talkin about, the block off plate goes on the same place that you would tap the block...sooo..ya..if you dont wanna tap it you could just do that...or both..i think i did both..i can't remember.

    But alas, i haven't started my motor so ya..sorry haha

    from what i have read you also need a vented gas cap. Can't remember if ppl had problems passing or not. #6 cylinder tends to run hotter too.
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    Impeller Head jt2ma71's Avatar
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    My 7m head is under a pile of parts in the backyard, I'll dig it out and take pictures later for you Trey. I only tapped about 3/4" deep or so but the bolt end goes all the way flush with the exhaust port wall.
    On the 2j, I used an aluminum rod then welded the end of it.
    Last edited by jt2ma71; 05-21-2011 at 05:51 AM.

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    Supra Tech Bmettie's Avatar
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    Quote Originally Posted by SupraTrey View Post
    Who here as disabled their EGR system? Not only just the block off plate but tapping the rear of the head as well. I am not worried about emissions and this will clean up my engine bay tremendously. No more BS vacuum lines. Does anyone have any pics? Anyone have any issues tapping the aluminum head? I know you need to drill it out slow as its aluminum but curious on results. Anyone try to pass emissions after doing a EGR removal?

    Thanks!

    Trey
    It's on the list as soon as I get my MAFTPRO dialed in I'm going to start removing all the unnecessary stuff under the hood.

    Quote Originally Posted by BlackDawg View Post
    i have done it...but idk what your talkin about, the block off plate goes on the same place that you would tap the block...sooo..ya..if you dont wanna tap it you could just do that...or both..i think i did both..i can't remember.

    But alas, i haven't started my motor so ya..sorry haha

    from what i have read you also need a vented gas cap. Can't remember if ppl had problems passing or not. #6 cylinder tends to run hotter too.
    You need a vented cap when removing your CC not EGR as exhaust gases don't travel through the gas tank.



    Does #6 really run hotter?
    Does anyone have data proving this theory or not?
    Why would it run hotter?
    Last edited by Bmettie; 05-21-2011 at 05:56 AM.

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    Member *****Supra's mk3 Boostin''s Avatar
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    No #6 doesn't get hot with the EGR off, its hot with it on. Hence the exhaust fumes get shot back into the back of the intake and guess whose the number one culprit to suck in the fumes...#6 cylinder making it run hotter than all the other

    Mine is deleted but I myself don't know what your talking about when you mean drill a hole?

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  6. #6
    Impeller Head jt2ma71's Avatar
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    You just make the hole the right size for the tap. You could also just use a tapered threaded plug which also requires tapping the threads. If you have the right size tap and bolt/plug for the existing hole size, then you wouldn't need to drill/resize the hole.
    Trey, when I get access to my old head, I'll pull that bolt out and you can have it. It goes all the way to the exhaust port wall. Part of it is machined down to the size of the hole so you don't need to tap threads all the way.
    Last edited by jt2ma71; 05-21-2011 at 10:44 AM.

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    Moderator/Troll Slayer SupraTrey's Avatar
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    Thanks guys. Blackdawg... Sorry I wasn't very clear. I was interested in people that have done a block off plate as well as tapped and plugged the head. I am tapping mine as since the head is aluminum I don't want to take the chance of the plate leaking. Plugs are a permanent "fix" if you will. Also for those that have done this I am curious on your egts after the mod. Theory states they should go down since the exhaust isn't recirculated but am curious on some real world results

  8. #8
    Impeller Head jt2ma71's Avatar
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    Having the egr system in theory reduces combustion chamber temps. Taking it out therefore will raise temperature. I took mine out before actually measuring egts, so I don't have actual comparisons. I mainly did it to clean and simplify things. The system also is only active during cruising conditions when intake vacuum is at its highest. It is not active during idle and/or WOT. I'm assuming alot of us are more worried about egts under boost conditions, so no, the egr has no effect there. I passed emissions without it with no issues but I was able to tweak stuff with the MoTeC. So this does not mean that you will also pass. There's also no visual inspection in my case. If your state requires that, well you won't pass obviously if it's missing.
    Last edited by jt2ma71; 05-21-2011 at 05:12 PM.

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    Supra Moderator Zumtizzle's Avatar
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    Ron is right.

    J-Dub did real world testing, his EGT's were significantly lower with the EGR on. But yea Tap the head and plug, and install the block off on the upper intake plenum, is the proper delete.
    Welcome to my nightmare!

  10. #10
    ZOOM ZOOM CALLE BlackDawg's Avatar
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    well i can post a pic of my block plate if ya want. I think we still tapped it too...just had the plate and wanted to make sure lol

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    SupraForums Member USPtwins's Avatar
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    don't mean to thread jack trey, but, what the heck do you tap? where? thanks
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  12. #12
    Impeller Head jt2ma71's Avatar
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    The hole in the back of the head. You either tap for a tapered threaded plug or for a
    Regular bolt. This way you don't use a plate.

  13. #13
    Moderator/Troll Slayer SupraTrey's Avatar
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    ^ Ditto.

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    SupraForums Member USPtwins's Avatar
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    The cooler plate right? I have the two egr block off plates... one for the head, and one for the mani.

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    Oldie but a Goodie
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    Hey Ron/ Trey/ anyone else that's done this... do you remember what size tap and plug you used for the back of the head?
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    SupraForums Member ChargedMK3's Avatar
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    Can someone please show pictures or further explain why its necessary to drill into the back of your head. I was under the impression that the block off plates were all you needed?
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    Quote Originally Posted by ChargedMK3 View Post
    Can someone please show pictures or further explain why its necessary to drill into the back of your head. I was under the impression that the block off plates were all you needed?
    They are all you 'need,' because that seals the exhaust and keeps it from going to the intake, but without removing the EGR plate from the back of the head and plugging the exhaust port, you'll always have a little pocket of hot exhaust sitting at the back of the head.

  18. #18
    TheFastCoonAss Rajunz's Avatar
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    The back of the head already has a port from the exhaust. All that you need to do is tap it and install a plug. Then only one plate is needed on the intake manifold. You can make one easily enough with aluminum plate.

    This is a JDM head which comes blocked off with a plate from the factory. I would use a pipe plug to ensure a better seal.


    The proper way to remove the EGR is if you remove the EGR system AND the Cooler Plate (2) behind the head and plug the exhaust port with a pipe plug. This Cooler Plate routes the exhaust from the hot side around the back of the no. 6 cylinder to the EGR system. By removing the Cooler Plate it removes this extra exhaust heat from the back side of that cylinder. By just using those block off plates (1&3) you are probably hurting that cylinder more than anything because then the exhaust gases are just trapped around the back of no. 6 without flowing. Also when you do this the second block off plate (3) is not even needed.

    Hope this helps,
    -Lance

    Last edited by Rajunz; 01-17-2012 at 03:45 PM.

  19. #19
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    I removed all the egr system including the 6 bolt plate on the back of head. Then I just put a small plate on the back of the head where the exhaust port is and the back of the manifold. Worked great. No problems!

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    Moderator/Troll Slayer SupraTrey's Avatar
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    Lance, my #6 is already starved for oil so what's wrong with a little exhaust keeping the cylinder company? :P damn 7m's..........

    On a serious note.... I don't remember what size tap I used..... If you have a tap and dye set, its easy to figure out and just match that tap with your bolt at the local hardware store. keep it real though..... Stay metric

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    Impeller Head jt2ma71's Avatar
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    I think I tapped it for a 14mm bolt, may be bigger. I used a bolt long enough so the end is flushed with the exhaust port wall.

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    what about all the vacuum hoses?
    i have jdm 2jzge but it didnt come with complete intake, so im going to re-use the us spec.
    just need to remove the egr then block off but then there is a nother saucer that connects to the egr as well as more vacuum lines. what do i do

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    Quote Originally Posted by jt2ma71 View Post
    I think I tapped it for a 14mm bolt, may be bigger. I used a bolt long enough so the end is flushed with the exhaust port wall.
    ^^^ this

    After that you port the screw to be flush with the exhaust port, minimizing turbulance there.
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    i have a question about the egr delete

    i have removed the egr sysytem off of my car but there is a vacuum line that runs to a electronic part what do i do with it ? And there is the charcoal can can i get rid of it to

  25. #25
    SupraForums Member ChargedMK3's Avatar
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    Can someone please tell me why you cant ust use block off plates for all 3? Why is it necessary to tap one of em, wont block of plates with a little RTV work fine?

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