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Thread: Cressida MX73 Conversions Guide Book

  1. #1
    umop apisdn Chief Engine Builder twentyEight's Avatar
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    Default Cressida MX73 Conversions Guide Book

    I found this write up whilst searching for other info and thought that it has a place on these forums as alot of the info contained is applicable to other conversions. (eg. Which bellhousing to use for which engine/gearbox combination)

    Enjoy.


    ENGINES

    6MGE
    bolts up, wires up, no effort required
    worthy if you can get one cheap.
    Difficulty 1/10
    Worth it? extra 20hp, 20 Nm torque, once again, price dependent (This is over the 5MGE, not the 5ME)

    7MGE
    bolts up, needs 7MGE loom, ecu and be 'spliced' into MX73
    may be able to use 5MGE harness and sensors, but wouldnít get full effect.
    may need small exhaust change to suit MX73 system
    Difficulty 3/10
    Worth it? extra 30hp, 30 Nm torque, price dependent (over the 5MGE)

    7MGTE
    bolts up, NEEDS 7MGTE loom, ecu, and be spliced into MX73
    needs bigger exhaust and intercooler to get best benefit.
    Difficulty 4/10
    Worth it? yes, if you can get one for a good price

    1GGTE
    Bolts up with GX71/GA61 1G-EU or 1G-GEU mounts.
    needs 1G gbox (or at least the bellhousing)
    needs 1GGTE loom and ecu, and be spliced.
    needs bigger exhaust and intercooler to get best benefit.
    Difficulty 5/10
    Worth it? yes, if you can get one for a good price, and you have the mounting sorted.

    1JZGTE
    Can use custom mounts with the stock crossmember (available in Australia, was $250AUD plus postage, not sure now) or you can use an MX83 crossmember, and factory JZX81 mounts,(late 90-92 for Australia, any MX83 for US), or you can use the factory JZX81 crossmember and mounts (ie, if you get a JZX81 front cut)
    needs 1JZ gbox (or at least the bellhousing)
    needs 1JZGTE loom and ecu, and be spliced.
    needs bigger exhaust and intercooler to get best benefit.
    Difficulty 7/10
    Worth it? yes.
    The Nonturbo 1JZ-GE isn't really a worthy swap for the dollars it costs, unless you can get one uber cheap.

    2JZGTE
    as above for 1JZGTE (same mounting), but will have clearance issues with turbo's (may not apply to LHD)
    Difficulty 9/10
    Worth it? yes.
    The nonturbo 2JZ-GE is also definately worth a look. It will match a stock 7M-GTE any day of the week, and is capable of nice figures with some dollars thrown at it.

    1UZFE
    needs custom mounts (available from Peewee on the Cressida forums, $120AUD plus postage)
    needs custom exhaust, and most likely manifold modifications around steering
    needs 1UZFE loom and ecu, and be spliced
    Difficulty 8/10
    Worth it? yes.

    ALL motors will need a front sump version.
    ALL sumps can be interchanged within the same family (ie, if you buy a 1jz with a mid sump, you can put a 2jz front sump on it, but you need the sump (both halves), baffle plate, pickup, and dipstick/tube)
    All loom problems can be sorted with going aftermarket ECU
    Any motor with coilpacks (ie, not a standard coil) will need a tacho converter
    Cost of installation of all motors is the same.
    What varies is exhaust costs, intercooler costs, wiring costs.
    Turbo motors may require a radiator upgrade.


    WHAT CARS HAVE WHAT ENGINES

    6MGE
    Found in the MS126? Crown 3000 as a mid sump
    Found in the MZ12 Soarer as a front sump.

    7MGE
    Found in MX83 Cressida as a front sump
    Found in MS130 series Crowns as a mid sump
    Found in MA70 Supras as a midrear sump
    Found in MZ20 Soarers as a midrear sump

    7MGTE
    Found in MA70/71 Supras as a midrear sump
    Found in MZ21 Soarers as a midrear sump

    1GGTE
    Found in GZ20 Soarers as a midrear sump
    Found in GA70 Supras as a midrear sump
    Found in GX81 Chasers as a front sump

    1JZGTE
    Found in JZA70 Supras as a midrear sump
    Found in JZX81/90/100 Chasers as a front sump
    Found in JZZ30 Soarers as a midrear sump

    2JZGE
    Found in JZA80 Supras as a midrear sump
    Found in JZZ31 Soarers/SC300 as a midrear sump
    Found in JZS14x Aristos/GS300s as a front sump
    Found in the IS300

    2JZGTE
    Found in JZA80 Supras as a midrear sump
    Found in JZS14x Aristos/GS300s as a front sump

    1UZFE
    Found in UZS131 Crowns as a mid sump
    Found in UZS14x/151 Crowns/GS400 as a front sump
    Found in UCF10/11/20 LS400s/Celsiors as a front sump
    Found in UZZ30/31/32 Soarers/SC400 as a midrear sump


    MOUNTS

    Last known address

    Bonneville Automotive Pty Ltd.
    17 Phillips Road
    Kogarah.
    New South Wales 2217
    Australia

    Phone: +61 2 9553 4708


    GEARBOXS

    W55, W57, W58, R154, A340E, A341E, A350E Will bolt up to all of these engines.

    W5x series gearbox to M series motor, will require a 5MGE or 7MGE manual bellhousing
    R15x series gearbox to M series motor, will require a 7MGTE manual bellhousing
    W5x series gearbox to G series motor, will require a 1GGE or 1GGTE manual bellhousing
    R15x series gearbox will not bolt to G series motor (but you can get the J160 6 speed from the IS200 that bolts up)
    W5x series gearbox to JZ series motor, will require a 1JZGE or 2JZGE manual bellhousing
    R15x series gearbox to JZ series motor, will require a 1JZGTE manual bellhousing
    W5x or R15x series gearbox to UZ series motor will require a custom bellhousing from CASTLEMAINE RODSHOP, or DELLOW AUTOS

    Converting to manual will require lengthening the driveshaft, or finding a manual one from a wreck.
    Using R154 or any of the auto's will require a larger spline on the driveshaft than the factory one.

    W5x series gearbox will require 2nd most rear shifter position (as per MA70)
    R15x series gearbox will require MA70 or JZA70 shifter position.

    MX73 runs the same output shaft as the W series boxes.
    The A340E (MX83 on), A341E, A350E, and R154 run a slightly larger output shaft, and will need a custom tailshaft (custom as in needs to be professionally modded).
    Some of the late model autos have a weird yoke on the output of the box, but these can be changed for a normal one.
    All bellhousings in the A340E, A341E, A350E range should be interchangeable with each other (you may have to swap over torque convertor too, which may require swapping over oil pump).
    A340E from MX73 runs the same output shaft as the W5x and the A43DE, so you will need to swap the yoke to use it with the later A34xE range.

    When mounting a gearbox in an MX73, there should be very little hassles.
    Under the car, the MX73 has a row of holes where you can choose where to put crossmember.
    And since the crossmember isnít straight, you can turn it around.


    DIFFERENTIALS

    You can get any ratio from about 3.5 to 4.7
    Look around local wreckers, look at RA65 Celica's, Crowns, Hiace's, Hilux's, and Supra's
    We can use the MA61 Supra LSD centre.
    Infact, the whole diff can just be swapped for a Supra one (bolts in)
    If you go a turbo, or the V8, I recommend getting a Truetrac LSD centre, from RABIDCHIMP

    Here is the list

    3.583 - RA65 Celica(F372)
    3.583 - RT142 Corona (F372)

    3.727 - RA65 Celica (F302)
    3.727 - GA61 Celica XX, (F302
    3.727 - MA61 Supra import(F303)

    3.909 - RA25 Celica Manual (F313)
    3.909 - MX13 Mk2 Corona(manual/auto?) (F312),
    3.909 - MX23 Mk2 Corona auto(F312),
    3.909 - MA46 Supra (manual/auto?) (F312)
    3.909 - MA61 Supra manual (F313)LSD

    4.10 - MS110 Crown auto (plated as F362, but was F293 in vehicle),
    4.10 - MS112 Crown auto (F292),
    4.10 - MX13 Mk2 Corona (F292),
    4.10 - MX73 Cressida auto(F292),
    4.10 - MA61 Supra auto(ADM) (F293),
    4.10 - GZ10 Soarer auto(F292),
    4.10 - MZ10 Soarer auto(F292),

    4.30 - GA61 Celica manual(F285)LSD
    4.30 - MS123 Crown auto(F282)

    4.556 - MA63 Supra auto(EDM?) (F252)

    4.75 - MS57 Crown auto(F??2 - no build plate fitted)

    4.778 - MS110 crown auto(F362)


    SUSPENSION

    There are a few places that do springs.
    Even if they don't list them, they will probably still make custom ones for you (price isn't much greater)
    KING SPRINGS
    KONI, Cressida not mentioned, but they will do custom.
    LOVELLS, Cressida low isn't mentioned, but I'm sure they do them.
    DOBINSONS


    As for shocks, get Tokico's.
    You can see which ones on the RABIDCHIMP website.
    MX73 uses the same shocks as the MA61 Supra

    I recommend getting PolyUrethane Bushes at the same time, make the ride a little bit stiffer.
    Who makes PolyUrethane Bushes?
    NOLTEC
    NOLATHANE
    LOVELLS
    SUPERPRO
    I dunno whether any of these are available in the USofA, but I'm sure at least one would be.

    RABIDCHIMP stock SUPERPRO bushes for the MA61. Crossreference the part numbers to find out which ones may be the same as the MX73


    OIL

    Manual gearbox, run Redline Lightweight ShockProof.
    Diff, not sure, but planning to run Redline of some sort.
    REDLINE


    RIMS

    The stock size is 15x6", with a 20mm offset.

    Apparently 17x7" rims, with a 25mm offset fit well.

    You then have to be careful what size tyres you put on so that it doesnt scrape.
    The largest I have seen on an MX73 was 18x8" on the front (with 245's) and 18x9" on the rear (with 265's), and he had to roll the guards to stop scrubbing.

    I would recommend 17x8" on the rear (with 245/40's) and 17x7" on the front (with 215/45's).
    This will keep the original tyre height (so speedo is accurate) and should avoid scrubbing.
    Last edited by twentyEight; 22-02-2007 at 04:41 PM. Reason: Links added
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  2. #2
    Junior Member Carport Converter RA35GT's Avatar
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    Default Re: Cressida MX73 Conversions Guide Book

    and for those with a MX73 the Toyota Cressida Forum has quite a bit of info.

    http://thermactor.com/forum/viewtopi...aec9e201853165
    1977 RA35 Celica GT - I4 | 2007 GSV40R Aurion - V6
    Don't live life being scared of death, live in the fear of not truly living. RP 2012

  3. #3
    umop apisdn Chief Engine Builder twentyEight's Avatar
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    Default Re: Cressida MX73 Conversions Guide Book

    Quote Originally Posted by 7M-GTE MX73
    and for those with a MX73 the Toyota Cressida Forum has quite a bit of info.

    http://thermactor.com/forum/viewtopi...aec9e201853165
    That's the exact page I found the info on...
    ([][][]II--LT--II[][][])


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  4. #4
    Official Off Topic KING! Conversion King stradlater's Avatar
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    Default Re: Cressida MX73 Conversions Guide Book

    Man, ASA mustn't be paying you enough. Hehe.
    www.stradlater.com | Facebook | LinkedIn

    1976 RA23 Celica - 1UZFTE ???rwkw - Earlier: 11.6 @ 116.9mph But Now: ??
    2007 BMW 3.0Si Z4 Coupe - 195kW 0-100 5.7.....
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  5. #5
    umop apisdn Chief Engine Builder twentyEight's Avatar
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    Default Re: Cressida MX73 Conversions Guide Book

    Quote Originally Posted by stradlater
    Man, ASA mustn't be paying you enough. Hehe.
    I could always do with more... Especially with what you know is planned for the 28!
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    Green '77 RA28 Celica - VVTi V8 Goodness...

  6. #6
    Junior Member 1st year Apprentice
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    Default Re: Cressida MX73 Conversions Guide Book

    yep nice write up peewee aka cruzida

  7. #7
    umop apisdn Chief Engine Builder twentyEight's Avatar
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    Default Re: Cressida MX73 Conversions Guide Book

    Quote Originally Posted by mark_vdh
    yep nice write up peewee aka cruzida
    I assumed he would be on here... I found the info very imformative, and thought that it belongs here also... I was very surprised when it wasn't on here already...
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  8. #8
    Toymods V8 Member Too Much Toyota CrUZida's Avatar
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    Default Re: Cressida MX73 Conversions Guide Book

    Tis me who wrote that if anyone is curious.
    Peewee
    1985 MZ12 Soarer - 1UZ Powered
    2013 86 GTS

  9. #9
    Awesome ****** Domestic Engineer Javal's Avatar
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    Default Re: Cressida MX73 Conversions Guide Book

    Cressida suspension parts are also availible from AJPS, for the reference.

  10. #10
    Junior Member Domestic Engineer Pube's Avatar
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    Default Re: Cressida MX73 Conversions Guide Book

    Does the mx73 cressida use the same engine crossmember to an st141/rt142 corona or an ma61? I have been trying to find a pic of a cressida crossmember and from the ones I have seen they look very similar to a corona crossmember.
    SOLD : 1GGTE Rt142 Corona - Twin TD04-9b turbos - 180rwkw = 13.1 @105mph

  11. #11
    Toymods V8 Member Too Much Toyota CrUZida's Avatar
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    Default Re: Cressida MX73 Conversions Guide Book

    I doubt the dimensions are the same.

    MA61 is different to RA6x
    I'd say RT142 is the same as RA6x

    Peewee
    1985 MZ12 Soarer - 1UZ Powered
    2013 86 GTS

  12. #12
    Junior Member Domestic Engineer Pube's Avatar
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    Default Re: Cressida MX73 Conversions Guide Book

    Thats a mx73 crossmember? it looks very similar to my rt142 c/m! ill have to get a pic to compare. Thanks for the pic.
    SOLD : 1GGTE Rt142 Corona - Twin TD04-9b turbos - 180rwkw = 13.1 @105mph

  13. #13
    Toymods V8 Member Too Much Toyota CrUZida's Avatar
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    Default Re: Cressida MX73 Conversions Guide Book

    Looking at it you'd almost say the MA61 or RA6x crossmembers are identical.
    Then you look at the steering rack mount, and they are different.
    Then you get the tape measure out, and its WELL different.

    MA61 measurements.
    http://conceptual.net.au/~peewee/uza...asurements.JPG
    MX73 is overall wider (instead of 780mm, its probably closer to 830mm)
    Peewee
    1985 MZ12 Soarer - 1UZ Powered
    2013 86 GTS

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