1. Join the Community!

    DSMtuners is a massive archive of DSM information - but more importantly, it's a COMMUNITY! Join in and participate with other DSMers, and invite all of your DSM friends to make this place their home. Chat with others, create a build thread, post questions and answers. Get involved! Logging in will also remove many of the advertisements, along with this notice. ;)

90 vs 91 dsm"s

Posted by codeofdastreets, Jan 13, 2010

Please Support Morrison Fabrications
Please Support Southbay Fuel Injectors
  1. codeofdastreets

    codeofdastreets Proven Member

    504
    2
    Joined Sep 25, 2008
    dunedin, Florida
    Hey I was just curious of what the diffrence between the 1990 dsm and the 1991 dsm are??
     

    825  0

    1991 Eagle Talon TSi AWD
    · 1G DSM
    Loading...
  2. Aries

    Aries Probationary Member

    13
    0
    Joined Jan 3, 2010
    Warsaw, Indiana
    Biggest difference is the 90's have the factory oil cooler. The 90's also were the only year that all the awd's were equipped with a rear LSD as anti-lock brakes were not available. The front driveshaft yoke is also a different spline count on the 90's. Also, the 90's used different length shifter linkages.
     

    218  0

    1990 Eagle Talon TSi AWD
    · 1G DSM
    Loading...
  3. BIRDCLAWTSi

    BIRDCLAWTSi Proven Member

    543
    3
    Joined Apr 13, 2009
    Danbury, Connecticut
    throttle bodies are different, shifter bushigs are different. thats all i know of for sure.
     

    584  0

    1990 Eagle Talon TSi AWD
    13.730 @ 97.000 · 1G DSM
    Loading...
  4. codeofdastreets

    codeofdastreets Proven Member

    504
    2
    Joined Sep 25, 2008
    dunedin, Florida
    camshaft angle sensers are diffrent also.. Is it possible to use a CAS from a 91 nd use it in a 90? Just curious.. Are the ecu"s the same??
     

    825  0

    1991 Eagle Talon TSi AWD
    · 1G DSM
    Loading...
  5. JusMX141

    JusMX141 Moderator

    14,973
    938
    Joined Dec 13, 2005
    Greensburg, Pennsylvania
    ECUs are definitely different with a different pin layout.


    I personally would stay away from a '90, but there are some that prefer them. One plus is if you get a '90 that's all original, you're guaranteed to have a 6-bolt under the hood....no guesswork like the '92 owners.
     

    4K  0

    1998 Mitsubishi Eclipse GST
    manual · 2G DSM

    6K  14

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    3K  0

    1992 Eagle Talon TSi
    manual · 1G DSM

    4K  0

    1993 Eagle Talon TSi AWD
    manual · 1G DSM
    Loading...
  6. StManTiS

    StManTiS Proven Member

    71
    0
    Joined Dec 3, 2009
    Stamford, Connecticut
    So is a 91 6 Bolt guaranteed then too?

    also if the 91+ AWD didn't come with an LSD what'd they have instead?
     
  7. AndrewD5418

    AndrewD5418 Proven Member

    1,307
    15
    Joined Feb 16, 2006
    West Bend, Wisconsin
    Yea, you need to wire it in tho..
     
  8. Rex2342

    Rex2342 Proven Member

    790
    12
    Joined Aug 30, 2004
    Mckeesport, Pennsylvania
    The main differences
    throttle body and TB sensors
    coil packs
    ECUs
    Gauge cluster. I've read the 90s read 145mph (mine does) and 91-94 read 140mph but don't quote me on this as I've not noticed in person.
    22 spline transfer case which in turn makes the transmissions different
    CAS, yes you can swap to a later model
    The oil filter housing and water pipe is different as the 90's have an oil cooler
    The shifter base, cables, and bushing are different
    The fuel rails are also slightly different if I remember right

    I think thats about it but I may have missed some things
     
  9. codeofdastreets

    codeofdastreets Proven Member

    504
    2
    Joined Sep 25, 2008
    dunedin, Florida
    damn so I guess ill be selling my 91 eprom ecu LOL.. Just wondering if 90"s come eprom??
     

    825  0

    1991 Eagle Talon TSi AWD
    · 1G DSM
    Loading...
  10. Rex2342

    Rex2342 Proven Member

    790
    12
    Joined Aug 30, 2004
    Mckeesport, Pennsylvania

    They did but they are super rare and any of them I've ever saw were way over priced. I'd keep the 91 eprom and read up on how to swap them out. It's not to difficult to swap it properly
     
  11. codeofdastreets

    codeofdastreets Proven Member

    504
    2
    Joined Sep 25, 2008
    dunedin, Florida
    So it"s possible to use 91 nd up 1g ecu"s??
     

    825  0

    1991 Eagle Talon TSi AWD
    · 1G DSM
    Loading...
    Talon43219 likes this.
  12. Aries

    Aries Probationary Member

    13
    0
    Joined Jan 3, 2010
    Warsaw, Indiana
    My 92 was 0-10-20mph etc and my 90 is 5-15-25mph...92 speedo topped at 150 and my 90 speedo topped 145. Sorry forgot that one.
     

    218  0

    1990 Eagle Talon TSi AWD
    · 1G DSM
    Loading...
  13. MarkyGsX

    MarkyGsX Proven Member

    80
    0
    Joined Aug 27, 2004
    Carson, California
    yes , all you have to do is swap out one pin on the ecu and install a tach adapter, my 90 came with an eprom but was burnt out, 35 bucks shipped anyone..?:rocks::hellyeah:
     

    422  0

    1990 Eagle Talon TSi AWD
    manual · 1G DSM
    Loading...
  14. Aries

    Aries Probationary Member

    13
    0
    Joined Jan 3, 2010
    Warsaw, Indiana
    Oh and with the 1gs if they had ABS then they did not have a factory LSD. If yours doesn't have ABS then odds are it had/has a LSD. My understanding is that the viberation of the LSD would irritate the exciter rings and it would act up.
     

    218  0

    1990 Eagle Talon TSi AWD
    · 1G DSM
    Loading...
  15. gingerbredman00

    gingerbredman00 Proven Member

    318
    1
    Joined Jul 9, 2009
    TULSA, Oklahoma
    A 90 is faster than any other model. (especially mine)
    not really just thought it was funny.
     
  16. tunethis

    tunethis Proven Member

    882
    7
    Joined Jan 29, 2008
    GVL, Florida
    The 91-94's do read to 140mph but has one more line after that which is 145. The 90's count in 5mph increments and uses that last line.
     
  17. tkelly27

    tkelly27 Proven Member

    1,713
    26
    Joined Mar 11, 2007
    Gresham, Oregon
    Most 1990's have eproms. I've never of heard of one without.
     
  18. big_d

    big_d Proven Member

    719
    2
    Joined Nov 29, 2005
    Columbus, Indiana
    Differences:

    -Throttle body and TB sensors
    -Coil pack
    -Power transistor
    -ECU
    -90s read 145mph
    -22 spline output shaft in transmission
    -22 spline all aluminum transfer case
    -CAS
    -The oil filter housing and water pipe is different as the 90's have an oil cooler
    -The shifter base, cables, and giant horse dong shift knob
    -The fuel rails are also slightly different
    -Cruise control located where ABS module is on 91-94 dsm's
    -Very slight difference in LICP location on SMIC
    -Orientation of stock BOV (90's BOV is upright)
     

    692  0

    1990 Eagle Talon TSi AWD
    12.809 @ 108.250 · 1G DSM
    Loading...
  19. Fast-Orange

    Fast-Orange Proven Member

    142
    2
    Joined Jul 1, 2008
    Saskatoon, SK, Canada
    Like others have said 90's do have ABS, mine did.
     
  20. gingerbredman00

    gingerbredman00 Proven Member

    318
    1
    Joined Jul 9, 2009
    TULSA, Oklahoma
    mine has ABS, someone lied to him.
     
  21. Rex2342

    Rex2342 Proven Member

    790
    12
    Joined Aug 30, 2004
    Mckeesport, Pennsylvania

    That's funny because I've never come across a 90 that had one and believe me I've searched every yard I could find for one. Maybe it's an East/West thing for eproms or something.

    Anyway, codeofdastreets, it is possible to use the 91-94 ecu in the 90. Heres a few articles about the wring differences.

    http://www.dsmtuners.com/forums/art...4-ecu-swap-into-1990-dsm-ignition-wiring.html
    DSMChips.com | DSM ECU Chips Enchanced by Keydiver
    http://www.dsmtuners.com/forums/bolt-tech/213438-91-t-body-cas-90-a.html
     
  22. JusMX141

    JusMX141 Moderator

    14,973
    938
    Joined Dec 13, 2005
    Greensburg, Pennsylvania
    I had the ECU rebuilt in a 1990 TSi AWD for a customer of mine a couple summers ago. It was a numbers-matching ECU that wasn't switched (car was all stock), and it definitely wasn't an EPROM.
     

    4K  0

    1998 Mitsubishi Eclipse GST
    manual · 2G DSM

    6K  14

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    3K  0

    1992 Eagle Talon TSi
    manual · 1G DSM

    4K  0

    1993 Eagle Talon TSi AWD
    manual · 1G DSM
    Loading...
  23. steve

    steve DSM Wiseman

    13,643
    759
    Joined Feb 3, 2002
    Boulder, Colorado
    I don't think there was any year where all AWD cars got the rear LSD standard, 91 cars were limited to either ABS or the rear LSD. The ABS controller couldn't deal with the LSD, so it was either one or the other. That was fixed in the 92 models.

    There are both EPROM and non-EPROM versions of 90 ECU's. It's hard to say what the mix was but it's true that good examples of either are getting hard to find due to the capacitors leaking and other failures over the years.

    One other difference, there were no automatic turbo cars in 1990.
     
    Last edited: Jan 15, 2010

    345  4

    2008 Audi TT 3.2 Quattro Roadster
    awd · manual · Misc Vehicles

    335  5

    2002 Audi TT Quattro Roadster 225
    awd · manual · Misc Vehicles

    346  2

    1992 Dodge Stealth RT/TT
    awd · manual · 3000GT/Stealth

    5K  12

    1991 Mitsubishi Eclipse GSX
    manual · 1G DSM
    Loading...
  24. DSMopar

    DSMopar Proven Member

    612
    11
    Joined Oct 6, 2007
    Vista, California
    Some of you guys are screwing this up, 91's could also have the early trans with the 22 spline output shaft...
     
  25. DSM1G90

    DSM1G90 Proven Member

    5,105
    61
    Joined Apr 6, 2008
    Nampa, Idaho
    Most definitely..and a strong one as well.
     

    2K  0

    1990 Plymouth Laser RS Turbo
    · 1G DSM
    Loading...

Share This Page

Support Vendors who Support the DSM Community
Boosted Fabrication ECM Tuning ExtremePSI Feal Suspension Fuel Injector Clinic Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications MyMitsubishiStore.com OHM Racing Raven Fabrication RixRacing RockAuto RTM Racing SouthBay Fuel Injectors STM Tuned VR Speed Factory