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  1. #1
    Non-member raj's Avatar
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    what is this turbo? t2/ t25??

    Stamped on the compressor housing: Garrett A/R .48 M24 L

    On the turbine housing is: Garrett .64

    The compressor inlet ID is 54mm

    The compressor outlet ID is 40mm

    The turbine fan DIA is approx 45mm.


    Would this unit be a t25.? if so, is it a large or small variant?

    how would this act with a std cam? spool up time etc

    and also how would this act with a piper 285 cam.?

  2. #2
    Committee, South East Regional Rep James5's Avatar
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    Re: what is this turbo? t2/ t25??

    Sounds like a T28 of a 200sx S14 turbo, on a 5 gtt will be quiet laggy, .64 rear is large for a 5 even with a cam.

    Get a small shot of NOS in there to make up for the lag and turbo will be fine
    Last edited by James5; 16-08-2011 at 12:46.

  3. #3
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    Re: what is this turbo? t2/ t25??

    id second what james says there, if you find it too laggy then i could either supply you with a .49 t25 housing for you to fit or could supply and get it fitted for you

  4. #4
    Non-member raj's Avatar
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    Re: what is this turbo? t2/ t25??

    what size housings does a std T2 turbo unit have.?

    im trying to understand the sizes as it confuses the hell outa me.....
    when does a turbo become a full t25? ie what are the minimum housing sizes for it to be classed as a full t25 unit?

    what size was the 220/tomcat turbo unit.?

  5. #5
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    Re: what is this turbo? t2/ t25??

    Tomcat is. 48 comp housing and. 49 ex housing. Full t25 will obviously have the t25 size housings,core wheels etc

  6. #6
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    Re: what is this turbo? t2/ t25??

    T2 is. 42 comp and .35 ex housing

  7. #7
    Non-member SCHWARTZ's Avatar
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    Re: what is this turbo? t2/ t25??

    The 200sx turbo has a bolt on inlet and outlet. Il have a look at mine when I get in and see if its m24. Whatever it is like james said the rear housing is very big and will be laggy.

  8. #8
    Committee, South East Regional Rep James5's Avatar
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    Re: what is this turbo? t2/ t25??

    Quote Originally Posted by SCHWARTZ View Post
    The 200sx turbo has a bolt on inlet and outlet. Il have a look at mine when I get in and see if its m24. Whatever it is like james said the rear housing is very big and will be laggy.


    Edited upload the pic's as attachements now

    200sx T28 is M24 matey

    Pic 1 is T28 200sx S14 cold side Ar.60 M24
    Pic 2 is knackered T28 200sx S14 .64 rear
    Pic 3 Tomcat T25 front ar .48 M27
    Pic 4 Standatd GTT T2 front and Tomcat front
    Pic 5 Standard GTT rear .35 and tomcat .49 rear
    Attached Images Attached Images      
    Last edited by James5; 24-08-2011 at 13:09.

  9. #9
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    Re: what is this turbo? t2/ t25??

    Raj thats a T25. As the guys say 0.64ar will make it very laggy, 5000+rpm so it won't be much use with a standard cam. Switch that housing for an 0.49, if you can find one and it'll be much better.

  10. #10
    Non-member raj's Avatar
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    Re: what is this turbo? t2/ t25??

    thanks for the info fellas

  11. #11
    Non-member raj's Avatar
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    Re: what is this turbo? t2/ t25??

    has anyone every had a roller bearing conversion done on there turbo? as i see certain companys offer this service!

  12. #12
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    Re: what is this turbo? t2/ t25??

    roller bearings cost big money but do reduce spool up times especially on t28 powered r5gtts

  13. #13
    Non-member raj's Avatar
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    Re: what is this turbo? t2/ t25??

    Quote Originally Posted by BluntyR5GTT View Post
    roller bearings cost big money but do reduce spool up times especially on t28 powered r5gtts
    any idea on the price of a roller conversion fella.?

  14. #14
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    Re: what is this turbo? t2/ t25??

    Ball bearings are about durability. They try and sell you them with the less-lag line, but really it makes sod all difference. They'll maybe respond a bit quicker after a gearchange. It won't come on any earlier than a journal. You can, if the oil is good, get away with murder if you have a ball bearing core.

  15. #15
    Non-member Markey Mark (BD)'s Avatar
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    Re: what is this turbo? t2/ t25??

    Quote Originally Posted by Scoff View Post
    Raj thats a T25. As the guys say 0.64ar will make it very laggy, 5000+rpm so it won't be much use with a standard cam. Switch that housing for an 0.49, if you can find one and it'll be much better.
    I learnt my lesson on the weekend, don't fit a .64 rear housing Raj. Its far too laggy and spool is very slow.

  16. #16
    Non-member 5teve L's Avatar
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    Re: what is this turbo? t2/ t25??

    Yeah bit big for a little 1.4, I think it's off an S13 200sx as I think thye had the smaller front T25.

  17. #17
    Non-member raj's Avatar
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    Re: what is this turbo? t2/ t25??

    Quote Originally Posted by 5teve L View Post
    Yeah bit big for a little 1.4, I think it's off an S13 200sx as I think thye had the smaller front T25.
    yes, the unit i have is from an s13 200sx

  18. #18
    Non-member raj's Avatar
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    Re: what is this turbo? t2/ t25??

    regarding my turbo (t25 from a s13 200sx)

    does anyone have any ideas on where i can buy a compressor OUTLET adapter from?
    it has 3 bolt holes.

  19. #19
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    Re: what is this turbo? t2/ t25??

    Quote Originally Posted by raj View Post
    regarding my turbo (t25 from a s13 200sx)

    does anyone have any ideas on where i can buy a compressor OUTLET adapter from?
    it has 3 bolt holes.
    Raj...get yourself on www.sxoc.com sign up and check out the classifieds. That's what I did when I needed one.

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