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2G EVO 3 Intake manifold 2G DSM w/ 1G NA TB

Posted by EVLGSX, Jan 29, 2018

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  1. EVLGSX

    EVLGSX Proven Member

    367
    136
    Joined Dec 7, 2017
    Wallingford, Connecticut
    Decided to go with the evo3 manifold. This is nothing new but decided to share my go at it. I also installed the 1g NA throttle body which I had sent to Steve at throttlebodys.com who did a fantastic job on it, great professional service, and very quick too.

    The manifold installed very nicely in place of my OE unit and the mounting bolts are WAY easier to get to on the Evo3 unit........sssoooo much easier. I also ran the harness under the manifold for a cleaner look. To do this, I had to cut back some of the tape/loom and re wrap stratigically to gain length for the TPS pig tail, but that was about it really.

    On the manifold, I cut the front 2 mounting lugs off that are meant for the the JDM coil bracket, and the two mounting lugs on the rear side, grinded down those locations, finish sanded the areas, and polished the plenum as a whole. The manifold was filthy to begin with and Im COP now so I had no plans on using a OE coil (if I could ever source/fab a bracket).

    Im really happy with the results as far as the fit and the way the install went. I deleted all the EGR nonsense in the process. It was easiest to just leave it all attached at the stock manifold, including the solenoids, for future reference/use. I just had to detach the three color coded vacuum lines at the canister, unplug and unbolt the solenoids from the firewall, and pulled the whole mess out with the stock unit.

    Heres some photos of the action. Havent fired it up yet, gonna pop the cams in and roll out tommorow.
     

    Attached Files:

    Street Build 1K  8

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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    rEclipserGST and spoolinpos like this.
  2. joemamma

    joemamma Proven Member

    280
    44
    Joined Jan 26, 2017
    williston, North Dakota
    polished up nice
     

    Drag Race Build 1K  1

    1998 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM

    Drag Race Build 81  1

    1997 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM

    Street Build 827  2

    1994 Eagle Talon TSi AWD
    manual · 1G DSM
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  3. guseclipse

    guseclipse Proven Member

    192
    17
    Joined Sep 10, 2010
    Paso Robles, California
    Nice. Also running this set up on my 6 bolt 2g head combo.
     

    Street Build 1K  0

    1998 Mitsubishi Eclipse GSX
    13.00 @ 100.000 · 2G DSM
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  4. spoolinpos

    spoolinpos Proven Member

    66
    31
    Joined Feb 13, 2008
    St. Clair Shores, Michigan
    looks nice! Nice little write up, I like the polish look.
     

    Street Build 2K  12

    1998 Mitsubishi Eclipse GSX
    10.361 @ 134.69 · 2G DSM
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  5. shinzon

    shinzon Proven Member

    271
    48
    Joined Sep 11, 2006
    St. Petersburg, Florida
    I saw this manifold for sale. Looks great polished.

    It took months of searching, but I just finished piecing together an Evo3 IM setup--manifold, throttlebody, coils, PTU, and manifold stay--of my own, but haven't installed it yet:

    IMG_20180123_192109.jpg
    IMG_20180123_192121.jpg
    IMG_20180123_192202.jpg


    Guess you don't need it with coil on plug, and with the mounts ground down, but I have a spare coil and ignition module brackets for anyone else looking to do an Evo3 IM swap.

    Edit: I can see what I think is the original banjo bolt for the EGR in one of the photos. Does your banjo bolt only have a hole on the bottom, and none on the side? Not that I intend to run an Evo3 EGR setup, but I've been trying to figure out how the damn thing is supposed to work with a banjo bolt with only an inlet on the bottom and no outlet on the side like mine had... ASA lists early Evo3s as using the same banjo bolt as the turbo oil feed, but the later Evo3s have a different bolt that was only used in Japan on CE9A, which is what I'm assuming came on my IM.
     
    Last edited: Jan 30, 2018

    890  2

    1996 Eagle Talon TSi AWD
    awd · automatic · 2G DSM

    460  1

    1997 Eagle Talon TSi AWD
    awd · automatic · 2G DSM
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  6. EVLGSX

    EVLGSX Proven Member

    367
    136
    Joined Dec 7, 2017
    Wallingford, Connecticut
    I just plugged the egr with a drain plug bolt of the proper thread pitch....I can report back with the thread sizes if anyone needs.
     
    Last edited: Jan 30, 2018

    Street Build 1K  8

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    Loading...
  7. EVLGSX

    EVLGSX Proven Member

    367
    136
    Joined Dec 7, 2017
    Wallingford, Connecticut
    The plug I used for the EGR fitting on my EVO 3 manifold is a M16x1.5 oil drain plug.

    Fit nice and looks decent- Advance auto P/N 65219 (Needa?)
     

    Street Build 1K  8

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    Loading...
    turbotalon1g likes this.
  8. shinzon

    shinzon Proven Member

    271
    48
    Joined Sep 11, 2006
    St. Petersburg, Florida
    Yeah, I got the thread size and pitch and all that, what I was wondering is if your original EGR bolt that came in the manifold had two holes or one? Looked like it was on the table in one of the pictures you posted.
     

    890  2

    1996 Eagle Talon TSi AWD
    awd · automatic · 2G DSM

    460  1

    1997 Eagle Talon TSi AWD
    awd · automatic · 2G DSM
    Loading...
  9. EVLGSX

    EVLGSX Proven Member

    367
    136
    Joined Dec 7, 2017
    Wallingford, Connecticut
    1 hole
     

    Street Build 1K  8

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    Loading...
  10. DogWhistle

    DogWhistle Proven Member

    358
    154
    Joined Sep 13, 2012
    St. Paul, Minnesota
    How did you handle the MAP placement?
     

    Drag Race Build 284  3

    1999 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    2K  6

    1999 Mitsubishi Eclipse Spyder N/T
    fwd · automatic · 2G DSM

    2K  0

    1991 Mitsubishi Mighty Max
    manual · 4G63t Swapped

    3K  6

    1996 Eagle Talon TSi AWD
    385 whp · 378 lb/ft · 2G DSM
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  11. shinzon

    shinzon Proven Member

    271
    48
    Joined Sep 11, 2006
    St. Petersburg, Florida
    Very strange. Makes me wonder how it ever functioned...

    Screen Shot 2018-01-30 at 10.08.14 PM.png
    I mean, how do gasses pass through the bolt (xx97) when traveling between the tube (12311) and intake manifold?

    Maybe I'm just completely misunderstanding how the system functioned, but it's almost like it was useless from the factory...

    Edit: After digging into it more, it WAS useless from the factory. It was meant for an antilag system, and was inactive system on the production evos, and was only there to meet homologation rules. Going to do some more research, but that's really interesting...
     
    Last edited: Jan 30, 2018

    890  2

    1996 Eagle Talon TSi AWD
    awd · automatic · 2G DSM

    460  1

    1997 Eagle Talon TSi AWD
    awd · automatic · 2G DSM
    Loading...
  12. shinzon

    shinzon Proven Member

    271
    48
    Joined Sep 11, 2006
    St. Petersburg, Florida
    Sorry for hijacking your thread, but I find this fascinating. So from everything I can gather, though we've (the DSM community) have always referenced that bolt on Evo3 intake manifolds as for an EGR system, it is actually meant for an antilag system. Some of the earlier Evo3s, the first run of 2500 presumably, had the system nearly functional (not turned on in the ECU though the code is there), while the final 5000 or so had the system bypassed with the one hole banjo bolt referenced in the posts above.

    I could be wrong because I haven't come across more than hearsay in my searching, but the system functions like this: when you lift off, the ECU opens the secondary air valve solenoid allowing vacuum to pass to the valve. The valve opens, letting air to pass from the intake pipe between the MAF and turbo to the port on the EVO3 intake manifold, causing a large amount of air to bypass the throttle plate. Simultaneously, the ECU adjusts ignition and fuel timing to optimally keep the turbo spooled up between shifts.

    Since air is passing the throttle plate off-throttle, it's not surprising they disabled this on the vast majority cars sold to the general public. It'd be very disconcerting: the car would continue to accelerate off-throttle, and you'd have no vacuum assist on the brakes when the system was active.

    Lastly many JDM Evos 3-5 should have an inactive system similar to this, and 6-9 used a different anti-lag system, but it was similarly bypassed from the factory.
     
    Last edited: Jan 31, 2018

    890  2

    1996 Eagle Talon TSi AWD
    awd · automatic · 2G DSM

    460  1

    1997 Eagle Talon TSi AWD
    awd · automatic · 2G DSM
    Loading...
  13. EVLGSX

    EVLGSX Proven Member

    367
    136
    Joined Dec 7, 2017
    Wallingford, Connecticut
    I deleted the MDP as I use ECMLink and do not require it for any reason, however, there are ways to keep it in the system if you so choose. I would think one of the easiest ways would be to use one of the adapters for the OEM unit that are available, and to use one of the nipples on the manifold to install it remotely with an as short as reasonably possible vacuum line.

    https://www.extremepsi.com/store/product.php?productid=27732
     
    Last edited: Jan 31, 2018

    Street Build 1K  8

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    Loading...
    DogWhistle likes this.
  14. cbyamd

    cbyamd Proven Member

    70
    1
    Joined Jan 6, 2012
    Nitro, West Virginia
    By deleting do you mean just unplugging the sensor? I too am going this route, would like some incite.
     

    147  5

    1995 Eagle Talon TSi AWD
    awd · manual · 2G DSM

    Street Build 562  10

    1991 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  15. marcman804

    marcman804 Proven Member

    413
    3
    Joined Mar 5, 2005
    Cumberland, Virginia
    Thats sick. You have me thinking about polishing mine up now. What did you use to polish it?
     

    691  16

    1997 Mitsubishi Eclipse GST
    14.434 @ 103.560 · 2G DSM
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