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Thread: Eaton M90 vs Eaton M112

  1. #1
    Estranged Member Chief Engine Builder mullett's Avatar
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    Jan 2006

    Default Eaton M90 vs Eaton M112

    I've been considering supercharger options for a 1G, since it was so addictive in the MR2...the chargers that come to mind (cheapish, efficient, readily available) are the Eaton M90 (as fitted to the commodore?) and the M112. I'm not sure if the M90 will be big enough (I'd like 230-250RWHP), does anyone know much about the peak outputs? I wouldn't want to run it much over 14psi...

    Seems like an M90 will stop at 12,000rpm, and produce about 500cfm at 10psi at that rev range...

    The M112 supposedly goes to 14,000rpm, and will flow 800cfm at 10psi...which seems a bit excessive


  2. #2
    how much is Too Much Toyota JustenGT8's Avatar
    Join Date
    Oct 2005

    Default Re: Eaton M90 vs Eaton M112

    M90 will be plenty on 2 litres....makes 200+rwkw on a UZ around 12psi so should flow more than enough for a 1G? M112 is a fair sized beast so yeah, overkill for a 1G
    Lily Simpson 6.7.2010

  3. #3
    Village Idiot Automotive Encyclopaedia
    Join Date
    Nov 2005
    Hoppers Crossing

    Default Re: Eaton M90 vs Eaton M112

    FIT over your way would be worth a chat to mullet

    thats on 3.8 litres of buick v6. 295hp is respectable

  4. #4
    Forum Member 1st year Apprentice
    Join Date
    Dec 2009

    Default Re: Eaton M90 vs Eaton M112

    owing a vs with a l67 "supercharged V6"
    i think the M90 will be heaps for a 2L.

    only problem with them is that they do make alot of heat at high rpm.
    i'm running a 71mm pulley and a 5% over drive balancer for the blower and a water to air intercooler, by memory i worked it out to about 14,000 rpm for the blower at 12psi "or was it 18,000?"

    a guy on another forum is selling a M90 gen 5 which is a yank blower, diffrent pitch in the rotors "better" and inlet is straight not bent like the aussie type.

    hope that help's?

  5. #5
    Not in the diner Alf! Conversion King RyleyMA61's Avatar
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    Sep 2005

    Default Re: Eaton M90 vs Eaton M112

    as everyone said m90 should be the shit

    im probably going to fit one to my m116 benz V8 (3.8 litre) should be interesting!

  6. #6
    Toymods Board Member Chief Engine Builder Hiro's Avatar
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    Apr 2006

    Default Re: Eaton M90 vs Eaton M112

    What's the supercharger like off a 2.0L/2.3L Kompressor Merc?
    AE102 - Charlene the Old Faithful, Reborn
    JZZ30 - Lexi the Spacecruiser, 1JZGTE>>3SGE. 200rwkw, hunting Skylines and n00bs in SS Commodores
    ST162 - Charlie the non-ghey Celica, 3SGE>>4AGE. GOOOOOOOONE
    AE82 - Rosie the Bitsa from Hell, 70.8kw atw. Has been converted into garage space and money at last
    KE55 - Billie the Beast, sadly missed

  7. #7
    Original Trendsetter Chief Engine Builder Harreh's Avatar
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    Jul 2008

    Default Re: Eaton M90 vs Eaton M112

    That'll be the MP62 or MP45 depending on the model.

    Both of which are probably on the smaller side, I'll be running an MP62 on a 4AGZE in the near future with any luck.

    The MP62 would go alright on the 1G but I'd go for the M90

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