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4th Gen* CSM 4G63 Swap (Mirage/Colt/Summit) FWD

Posted by dugan33, Feb 6, 2020

  1. 2G

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  2. 1G

    100.0%
  3. This is actually a 4th gen CSM (dont pick this option) lol

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  1. dugan33

    dugan33 Supporting VIP

    383
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    Joined Jun 11, 2011
    Madison, Wisconsin
    I have a 1995 1.8L Mirage Coupe LS that I am looking to 4G63 swap. I'll be keeping it FWD for now.

    I've received a lot of contradicting advice as well as found a lot. So, I would like this post to clarify every item needed to complete this motor swap.

    Once all required items are resolved I'll mark it resolved and save the list for future reference.

    Here's what I think I need, looking for people to correct me(I'm sure there's plenty to correct):

    Engine Assembly: Entire 6 bolt or 1st gen 7 bolt 4G63 motor.
    Engine Harness: 91-94 DSM
    Transmission: 2G FWD or Original 1.8 CSM
    Shift linkage: 2G FWD
    Shift assembly: 2G FWD
    Drivers Motor Mount: Modified 1G Manual Mount?
    Front Motor Mount: Original Mount?
    Rear Mount: 2G FWD Transmission Mount?
    Pass Trans Mount: 2G FWD.
    Alternator: Original 1.8 CSM? Connection splice?
    Radiator: Original or 2G?
    Coolant Temp Sensor: Any?
    Water Neck: 1G?
    ECU: ECMLinkv3 1G ECU
    DIAG Port: 1G DSM?


    A lot of these options depend on earlier selections, I imagine a 2G motor would change many other items. What motor makes an easier swap?

    I can make a matrix once I get enough input.
     
    Last edited: Feb 7, 2020

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  2. motomattx

    motomattx Proven Member

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    Joined Dec 9, 2010
    wampum, Pennsylvania
    The 1g is the more popular version to build, there are also more options for intake manifolds, pistons, crankshaft girdle, things like that, but the entire 1g vs 2g engine and six bolt vs seven bolt debate has been beaten to death for years and you will have a few come on here and quote me and disagree with me, so on and so forth, use what you can find the easiest but more of the higher horsepower cars run the 1g six bolt stuff for what its worth and its what I prefer to build, more in particular the 1g six bolt stuff, but even the 1g seven bolt stuff if you had to in my opinion is less problematic than the 2g stuff in my experience and thats all that I prefer to say about that, if you want more in depth information you can pm me!
     

    Drag Race Build 3K  24

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  3. dugan33

    dugan33 Supporting VIP

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    Joined Jun 11, 2011
    Madison, Wisconsin
    I'm mostly concerned with motor mounts and electronics.

    it will need a harness and ECU to match so I figure this decision should be made basically on whats easiest to do.

    Can I not just take everything from a 2g fwd and put it right in? What motor mounts need to be modified to make that work? If I use 2G parts im concerned with the speed sensor and gauge cluster functions. Whereas I imagine a 1G swap I can avoid that headache with the cluster. I may have the headache either way though :confused:
     

    Street Build 2K  0

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    manual · 2G DSM

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  4. motomattx

    motomattx Proven Member

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    wampum, Pennsylvania
    What year is the mirage?
     

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    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  5. dugan33

    dugan33 Supporting VIP

    383
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    Joined Jun 11, 2011
    Madison, Wisconsin

    1995
     

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    manual · 2G DSM

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  6. motomattx

    motomattx Proven Member

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    wampum, Pennsylvania
    Being a 95' I would guess that the 2g stuff would be the likely parts to be easier to bolt up.
     

    Drag Race Build 3K  24

    1995 Mitsubishi Eclipse GST
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  7. mitsubishikid

    mitsubishikid Proven Member

    829
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    Joined Jun 8, 2009
    Turlock, California
    Your mirage is a 4th gen csm "93-"96 is the 4th gen, a 3rd gen csm is "89-"92 [which is what I own] 4th gen csms were based on the lancer evo 1-3, which all used the 7 bolt engines, and so they have the front and rear roll stop mounts on the transmission like on a 2g vs a 1g, so your best bet would be to try and use 2g turbo fwd transmission, some csm guys have had good results using 2g n/t 2.4 dsm spyder manual transmissions they hold torque pretty good, as for the motor I would say use what you can find a 6 bolt would be the way to go IMHO, but 7 bolts are also worth looking into if that is all you can find, the 1g harness is a lot easier to work with and more documented however you can buy a patch harness that will make using a dsm engine harness plug and play with your mirage, i think he also offers a 2g harness but i'm not too sure http://www.4g63swapped.com/pnp-harnesses.html he also has done a few swaps on these so you might get some good info on what mounts to use.
     

    1K  0

    1990 Eagle Talon TSi AWD
    manual · 1G DSM
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  8. dugan33

    dugan33 Supporting VIP

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    Joined Jun 11, 2011
    Madison, Wisconsin

    That link is awesome, I hope I can still get some stuff from there. I'll keep you updated.

    Since I have 2G turbo transmission I will opt to use this if possible or the existing 1.8 trans it has
     

    Street Build 2K  0

    1995 Eagle Talon TSi AWD
    manual · 2G DSM

    2K  0

    1990 Eagle Talon TSi AWD
    manual · 1G DSM

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    1992 Mitsubishi Eclipse GST
    manual · 1G DSM
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  9. mitsubishikid

    mitsubishikid Proven Member

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    Turlock, California
    the 1.8 transmission is an f5m22 IIRC making it pretty much the same as the 1.8 1g dsm transmission they have weaker internal bearings vs the f5m33, also the gearing is different the f5m22 has a higher final drive IIRC and that means higher rpm cruising on the freeway, so you'd be right to start with the f5m33 for the added durability and the better gearing, the website link I left was Chris Pearson's site, you can contact him on facebook or he is also known as Mirageman89 on 4g61t.org and the mirage performance forums which are also good places to do research on these cars the 4th gens are more popular on mirage performance though.
     

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    1990 Eagle Talon TSi AWD
    manual · 1G DSM
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  10. dugan33

    dugan33 Supporting VIP

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    Joined Jun 11, 2011
    Madison, Wisconsin
    Thanks so much for this info! I have plenty to research there, was just on the site. I reached out to him via email too.

    I'll report back here once I learn up a bit.
     

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  11. dugan33

    dugan33 Supporting VIP

    383
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    Joined Jun 11, 2011
    Madison, Wisconsin
    • Corey got back to me below is basically our conversation and his answers, he brings up some good points on braking options.
    My horsepower wont probably be even above 250 on pump. I have one around if needed but If I put that in then i'll need the return line etc.
    - You wouldn't need a FPR if your goals are that modest, but if you turn it up, you'll run into lean condtions and could cause engine destroying knock. You'd rather run rich to prevent knock, than run lean and encourage it. I'd put a FPR just to be ready for future mods. You will not leave it this way long more than likely.
    My overall goal is to make it appear as if this 4g63 came factory in this mirage. So much so that ecmlink isnt even needed, it should run fine on the stock dsm tune. I'll be getting ecmlink for sure anyways but yea, maybe that helps give the expectations for power since im keeping it FWD.
    - You'll need some type of tuning solution like ECMLink or Haltech if you have the money...That is the way to go, but us Mirage guys aren't rich..LOLI can get 6 bolt or 7 I guess the decision was left to what's easier to do.
    - Neither will be harder than the other, the 6bolt has a stronger bottom end, but the head doesn't flow as good as the 7Bolt. So most folks do 6bolt block, 7bolt head that is the most optimal setup aside from getting the factory 6 bolt head ported/polished etc.
    What harness adapter do I need?

    - 7bolt engine = 7Bolt adapter 6bolt engine = 6 bolt adapter
    What mounts do I need? Are they modified or just the original dsm mounts.
    - If you go 7 bolt, get the Factory DSM 2G timing mount, 6bolt get the 1G timing mount.
    What side mount intercooler setup would I need?
    - If your goals aren't even for 300? The factory 14B intercooler would suffice, it will get heat soaked. But, will be easy to hide and install for the setup you're looking for.
    What shift linkage would I need if I used a 2g fwd manual trans?
    - So I have a manual trans with a 2G trans as well, you'll need the factory shift linkage for the mirage, clutch pedal assembly (go hydro if you can).
    I'm interested in the rear brake conversion for sure, but idk if its my first priority. 200-250hp will be a bit more but not as drastic as 300-350. Realize at 250HP, the mirage will have trouble stopping. The car from the factory, with the 1.8 liter, only had 115HP, the 1.5 liter had 95! So, consider the increase you're speaking of. It will be able to stop, but not safely in my opinion. Being ready for future power is just smart, always plan ahead. Don't plan for what you're goals are now, because they will change more than likely.

    • Once I have my motor figured out 100% I'll be ordering his adapter harness and getting to the install. I'll keep you updated.
     

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