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420 to 4g63

Posted by Thomas Mason, Nov 27, 2019

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  1. Thomas Mason

    Thomas Mason Proven Member

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    Anyone familiar with how much work is involved swapping a 420 to 4g63... custom fabrication difficulty etc? Thanks
     

    363  1

    1999 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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  2. 609DSM

    609DSM Proven Member

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    Joined Aug 13, 2019
    Princeton, New Jersey
    There is some information of swapping the evo VIII 4g63t into the 2ngt eclipse. Look up Miguel_DSM on youtube or Google, he has an Instagram too. He is currently in the process of converting his 1999 OZ rally special edition 2gnt eclipse from a 4g63t swap to an AWD swap.
     

    Street Build 277  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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    Thomas Mason likes this.
  3. 609DSM

    609DSM Proven Member

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    Princeton, New Jersey
    The evo VIII swap requires little fabrication, I believe it deals with cutting into the sub frame a little. I don't know the details, a little research will lead you in the right direction. There isnt any actual write ups of step by step "this is how its done" that I am aware of. It requires more fabrication and modification to swap a 2g gsx/gst into a 2gnt body, it is a lot more work but the evo VIII swap is more expensive since you need an evo VIII motor which is pricey. Most people will tell you to just buy a gsx or gst
     

    Street Build 277  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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    SAKJR, Thomas Mason and 91talonts1 like this.
  4. Thomas Mason

    Thomas Mason Proven Member

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    Covington, Kentucky
    I ac
    I’m actually subscribed to him and was just watching one before I came to bed LOL I started to not think it was a 4g63 tho with the timing belt on the 420a side tho
     

    363  1

    1999 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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  5. Thomas Mason

    Thomas Mason Proven Member

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    Covington, Kentucky
    Appreciate it I’m actually
    appreciate it I’m actually looking for a gsx on the daily. Been getting a lot of bs post and listings but eventually. Have my eyes on a couple 4g63 engine also which brought up the idea. Thanks tho man
     

    363  1

    1999 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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    609DSM likes this.
  6. Thomas Mason

    Thomas Mason Proven Member

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    Covington, Kentucky
    Appreciate everyone’s insight, I didn’t even realize the 4g63 was different in the evo 8 then the eclipse engine. I’ve always heard they were the same with exception of turbo size
     

    363  1

    1999 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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  7. 609DSM

    609DSM Proven Member

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    Princeton, New Jersey
    Some of the evo engines are in reverse order to the normal 4g63t engines. Don't know the specifics of why they opted for that style, maybe it was low key for hobbyist with some ingenuity and skill, who knows.
     

    Street Build 277  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  8. Thomas Mason

    Thomas Mason Proven Member

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    Covington, Kentucky
    So it’s the same exact engine but setup differently?
     

    363  1

    1999 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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  9. motomattx

    motomattx Proven Member

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    wampum, Pennsylvania
    Pretty close to a 7 bolt Dsm engine, but its flipped backwards is all, of course little things are different like main bearing caps and rod part numbers and the cylinder head is a newer design but otherwise its the same.
     

    Drag Race Build 3K  24

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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    609DSM and Thomas Mason like this.
  10. Thomas Mason

    Thomas Mason Proven Member

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    Covington, Kentucky
    Thanks my friend, you helped me learned something new day. Appreciate it.
     

    363  1

    1999 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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  11. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Hoover, Alabama
    Don't do this swap unless you really reallllllly want to. You'd be better off buying a car that came with the 4g63t. It is way less time consuming, way easier, and maybe just maybe cheaper.

    You have my support if you want to do the swap, but I just recommend that you don't. Good luck with whatever though! :thumb:
     

    Road Race Build 3K  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    32  3

    2008 Tomberlin Crossfire 150R
    rwd · manual · Misc Vehicles

    47  6

    2008 Tomberlin Crossfire (325 swapped)
    rwd · manual · Misc Vehicles
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  12. Thomas Mason

    Thomas Mason Proven Member

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    Yea def looking for a gst at the least... forgot all that crazy stuff I’m too impatient and it will be a daily driver soooo
     

    363  1

    1999 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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    609DSM likes this.
  13. 609DSM

    609DSM Proven Member

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    If you cant find a gsx you can always get a gst and do an awd swap, it is far less work than a 420->4g63t I believe.
     

    Street Build 277  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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    BLACK'98DSM likes this.
  14. BLACK'98DSM

    BLACK'98DSM Proven Member

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    That's true, but you could just wait until you find the GSX. I bet you can find one for the same price if not only slightly more expensive than a GST.
     

    Road Race Build 3K  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    32  3

    2008 Tomberlin Crossfire 150R
    rwd · manual · Misc Vehicles

    47  6

    2008 Tomberlin Crossfire (325 swapped)
    rwd · manual · Misc Vehicles
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    Thomas Mason likes this.
  15. Thomas Mason

    Thomas Mason Proven Member

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    I def agree, thanks everyone for the insight and suggestions. Thus is why I enjoy this website. They are hard to find around me in ky that’s for sure
     

    363  1

    1999 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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    BLACK'98DSM likes this.
  16. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Hoover, Alabama
    Same here.
     

    Road Race Build 3K  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    32  3

    2008 Tomberlin Crossfire 150R
    rwd · manual · Misc Vehicles

    47  6

    2008 Tomberlin Crossfire (325 swapped)
    rwd · manual · Misc Vehicles
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  17. Thomas Mason

    Thomas Mason Proven Member

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    Covington, Kentucky
    I’m just dying to find out what the highest hp I can get out of one safely and what it feels like to be boosted ha ha. N/a for the birds
     

    363  1

    1999 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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  18. BLACK'98DSM

    BLACK'98DSM Proven Member

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    The 420a is not a bad platform, the ecu just isn't built to make hp, it's meant for good gas mileage and no knock.
     

    Road Race Build 3K  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    32  3

    2008 Tomberlin Crossfire 150R
    rwd · manual · Misc Vehicles

    47  6

    2008 Tomberlin Crossfire (325 swapped)
    rwd · manual · Misc Vehicles
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    609DSM likes this.
  19. Thomas Mason

    Thomas Mason Proven Member

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    I’ve enjoyed both my Gs and rs of course strut towers are horrible in both. Rockers etc are also bad. Front support below the engine and under front bumper are broken... it’s time to let em go
     

    363  1

    1999 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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  20. Thomas Mason

    Thomas Mason Proven Member

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    Fairly quick when lights are pink for 140hp LOL
     

    363  1

    1999 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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  21. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Hoover, Alabama
    Luckily, mine has no rust. I also enjoy it very much! :)
     

    Road Race Build 3K  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    32  3

    2008 Tomberlin Crossfire 150R
    rwd · manual · Misc Vehicles

    47  6

    2008 Tomberlin Crossfire (325 swapped)
    rwd · manual · Misc Vehicles
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    Thomas Mason likes this.
  22. KYLE JORGENSEN

    KYLE JORGENSEN Proven Member

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    SPOKANE VALLEY, Washington
    Evo 8 uses the 4g63 motor its just designed so the transmission sits the same as the 420a which makes it a easier swap, there are a lot of people in Europe doing EVO 8 swaps on 2g Eclipse's! It is well worth it and it is really not that much work, you will have more work swapping in a 4g63t from a gst or gsx since transmission is on passenger side it will cause loads of fabrication.

    I believe only minor things are needed for the EVO 8 swap with little to no fabrication
     

    Street Build 874  20

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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    Thomas Mason likes this.
  23. Thomas Mason

    Thomas Mason Proven Member

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    Thanks man I’m just looking for a gst that isn’t over priced or trashed from this point LOL
     

    363  1

    1999 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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    BLACK'98DSM likes this.
  24. BLACK'98DSM

    BLACK'98DSM Proven Member

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    You'll need to weld up new motor mounts.
     

    Road Race Build 3K  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    32  3

    2008 Tomberlin Crossfire 150R
    rwd · manual · Misc Vehicles

    47  6

    2008 Tomberlin Crossfire (325 swapped)
    rwd · manual · Misc Vehicles
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    Thomas Mason likes this.
  25. Thomas Mason

    Thomas Mason Proven Member

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    Covington, Kentucky
    Anyone know what ideal hp you can get out of the 4g63t and 420 a’s safely with stock blocks etc. I may just build a 420
     

    363  1

    1999 Mitsubishi Eclipse N/T
    fwd · automatic · 2G DSM
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