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Extrude Honed turbine housing..

Discussion in 'Turbo Tech Questions' started by Bellman Jeff, Oct 29, 2005.

  1. Bellman Jeff

    Joined:
    Jan 29, 2003
    Anyone ever do this ?? Do you think it would benefit a marginal setup ?? Or would it throw it all out of wack ??

    If I can get some positve feed back from any of the gurus on the board, I'll do it.. And get the housing Jet Hot coated too...
     
    Bellman Jeff, Oct 29, 2005
    #1

  2. ta2slow

    Joined:
    Feb 1, 2004
    I would think that extrude honing would open the housing up too much cuzing too much clearance between the turbine housing and the turbine itself. I think that would make the turbo spool slower. Maybe someone on here has done it and can tell us if it helped?
     
    ta2slow, Oct 29, 2005
    #2

  3. gtluke

    Joined:
    Sep 30, 2003
    yeah i don't suggest messing with the turbine housing. just get a bigger one if you need a bigger one.
     
    gtluke, Oct 29, 2005
    #3

  4. turbo66

    Joined:
    Feb 12, 2005
    Could be a good way of increasing the effective a/r of the turbine housing, need someone to do it and let us know the results :D
     
    turbo66, Oct 29, 2005
    #4

  5. SWT Racing

    Joined:
    Jan 29, 2003
    :withu:

    If you Extrude Hone, you're going to increase the clearance between the turbine and the housing, which will kill turbine efficiency. Either hand port the housing (which is not all that difficult) or go to a larger housing as Luke stated above.
     
    SWT Racing, Oct 30, 2005
    #5

  6. Bellman Jeff

    Joined:
    Jan 29, 2003
    Oh well... It seemed like a good idea at first.. Glad I asked first ...
     
    Bellman Jeff, Oct 31, 2005
    #6

  7. 92coupe

    Joined:
    Aug 10, 2004
    or you could just get a bigger a/r
     
    92coupe, Oct 31, 2005
    #7

  8. Agent86

    Joined:
    Jun 3, 2003
    if the extrude hone is done correctly, it wont increase the turbine wheel/ housing clearance. i've had mine done and the guy set up the process so it didnt affect this part. very effective way to increase turbine AR esecially if you want to give the apearance of stock.. i also had hte comp cover done, to much thermal benifits :)
     
    Agent86, Oct 31, 2005
    #8

  9. Bellman Jeff

    Joined:
    Jan 29, 2003
    You don't say !!! In my situation they don't make a larger A/R turbine housing (.96) for a Precision PT 88.. So that maybe an only option, besides hand porting.. The car pulls like a bear to the rev limiter (7000 rpms).. But with the 88's T4 housing on a 383 ci motor.. It has got to be seeing a lot of back pressure..

    One thing it has going for it.. The 88's T-4 housing is way way bigger than the T76's T-4 housing.. Bigger in every way, except the bolt pattern..
     
    Bellman Jeff, Nov 1, 2005
    #9

  10. SC302Beast

    Joined:
    Nov 27, 2004
    Anyone have an idea on how much it costs to get a housing extrude honed? I've also tried to find pics or instructions on how to properly hand-port a housing to no avail...any ideas? Like Bellman Jeff, I'm sort of limited to the housing I have, so porting might be my easiest alternative.
     
    SC302Beast, Nov 1, 2005
    #10
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