1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Trouble Logging In or Staying Logged In?

    CLEAR YOUR BROWSER COOKIES! More info about this can be found here. If you still have trouble after clearing your browser's cookies and cache, reply to that thread and tell us what browser you're using and what device you're using.

Porting exhaust housing for an EvoIII 16g

Posted by EVLGSX, Dec 25, 2017

Please Support Fuel Injector Clinic
  1. EVLGSX

    EVLGSX Proven Member

    190
    47
    Joined Dec 7, 2017
    Wallingford, Connecticut
    I know there are other threads on this but I wanted to show the results of my port job on the wastegate and report back with how it turns out after I put it back together and take the car out.

    I started off with a carbide rotary file on a pneumatic rotary tool, then a small drum sander, 80, 180, 320 in that order, then did 180 followed by 320 by hand.

    Hopefully the boost creep is under control now.

    For anyone who doesnt know, the idea is to remove material to give the air a more direct unobstructed path to flow through. As it comes, the air has to flow around a sharp corner which is part of the problem. By removing the material that is in the way, and smoothing things out, it speeds things up and helps move the air through the passage we want it to go through.

    ( I have more photos to add of the work from the other side to open the flapper as well and will add them tommorrow)

    hope this helps someone

    Heres a look at the exit side of the housing. I dont have any photos of before I removed all the material I did, but the idea is illustrated in the photo where I am holding the flapper partially open, rather than a full 90 degrees open. Normally the flapper arm would hit against the actual housing before opening a full 90 degrees.
     

    Log in/Register to remove ads

    Attached Files:

    Last edited by a moderator: Dec 30, 2017
    1997 Mitsubishi Eclipse GSX

    Street Build

    16g   manual
    Loading...

    Featured Products from our Supporting Vendors

  2. EVLGSX

    EVLGSX Proven Member

    190
    47
    Joined Dec 7, 2017
    Wallingford, Connecticut
    Heres a look at a 16g that has had nothing done to it. Ive got my car back together now and the difference is tremendous. This is 100% without question worth doing and should solve most peoples creep issues on this fun daily driver turbo. I havent gone over 18psi with it yet, but will be in the coming weeks as i dial in link. As of now, there is zero creep as if its on an external gate to the manifold.

    In the past, I had dealt with this sort of issue by welding a 38mm tial flange to my manifold and dumping atmosphere, I was always too lazy to route it back into the downpipe even though I was tired of the noise so this is great.
     

    Attached Files:

    1997 Mitsubishi Eclipse GSX

    Street Build

    16g   manual
    Loading...

Share This Page

Loading...


Log in/Register to remove this ad

Support Vendors who Support the DSM Community
Ace Race Parts Archer Fabrication Best Used Tires Boostin Performance ECM Tuning ExtremePSI Feal Suspension Fuel Injector Clinic Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications OHM Racing RockAuto SouthBay Fuel Injectors STM Tuned Tire Rack VR Speed Factory White Shed Speed