well i have my 85 mirage and i looked up a 4g63 swap came up empty handed my step dad told me the 4g63 might be to big and would rip the poor thing to shreds its has also been hard to find after market parts for such a kik ass classic but i found a site with the info on the 4g63 swaps and all the cars that it is capable of working for
Here is the info that I have compiled thus far concerning the swap of a 4G63, 2.0L Turbo motor from a Mitsubishi Eclipse GS-T, GSX, Eagle Talon TSI FWD or AWD, and/or Plymouth Laser RS Turbo into a 4th Generation, 1993-1996, Mitsubishi Mirage, Eagle Summit, Dodge Colt. Thanks to Evil93Evo, aka Tom, for the majority of this info. It was collected from several different posts that he made, so it is just pieced together. This info is probably similar to what blytz has posted on
www.miragetuner.com/
With no further adieu, here is the file:
You need to modify the timing belt mount by cutting and moving the rubber section of a 89 turbo mount, this is easiest if you use a combination of a talon mount and the mirage turbo mount. You may need to slot the holes on the other transmission mounts slightly if your car has been in an accident before. You will need to use the ECU and wiring harness from the same year engine you have ready to install. Get a good wiring diagram for both cars before you begin, if the car has a factory tachometer it will not read correctly. You will need to use a flywheel from a 2.0 non turbo DSM fwd 89-94 make sure it has the correct number of bolt holes for your engine (ie 6 bolt or 7 bolt). Buy the ACT clutch kit, anything else will not hold up as they all use stock type pressure plates. ACT part #MB3-XTR6 holds 414ft lbs of torque. You will be able to use the factory transmission with the 4G63 as long as you aren’t doing serious drag racing with slicks even the 1.5 transmission will work, but if you can, use the 1.8 transmission and axles. You must use the starter and the plate that mounts behind the flywheel from the original mirage engine, it will bolt right onto the 4G63. The 4g63 may bring the need to bend one of the under-hood braces slightly to gain clearance for the timing belt cover; mine did only after a replacement hood, not a big deal! As far as time line goes if you have all the parts together it should take about 8 hrs total to do the swap, You will need to build all the intercooler piping and exhaust piping yourself or pay someone to do it for you. So allow some time for that. You will need to use a upgraded fuel pump for a second Gen eclipse, then slightly dent down the gas tank under the pump for added clearance, about 1.5hrs work. I do all my own work, so it cost me about 3000 dollars total for everything, but I did extra stuff most people don’t need. I had a modified ECU, AFC, big front mount intercooler, 16g, full 3" exhaust, 550cc injectors. So if you are just using a stock engine you can save big bucks. I was just wondering why you would be interested in using a 2g ECU and wiring with the swap? There are a lot of drawbacks to the 2G system if you are installing it in a 93-96 car, first off the fact that they are OBD2 and require all the sensors to go with it, some not available for on a 1g type engine, second the Cost of a 95+ ECU is higher and you lose the cheap ECU modifications and data-logging available for the 1g ECU. I have done the swap and the wiring is no harder than installing a stereo system if you have the wiring diagrams. Basic soldering skills are needed, and how to use a voltmeter. Basically you need a + power constant on for memory, + power on with ignition, chassis ground, clutch safety switch, vehicle speed sensor, check engine light, fuel pump wire, coolant temp sensor for gauge, oil pressure wire for light or gauge (not part of engine harness). All the other wiring for the engine is part of the engine harness. Get out your Voltmeter and start checking continuity and for power wires from the ECU harness then label everything showing where it goes, it’s a lot easier to fix problems now instead of when you are trying to start it for the first time. So only use a 2g ECU if you want to use a 2g motor, but then you might as well just keep the 1.5 at least they don’t have crank walk (hehe, I like that part-Chris). You will need to use a mirage transmission because the 1g fwd does not mount the engine like the mirage; the mirage mounts like a 2g eclipse with 3 transmission mounts and one motor mount. Most used 2g FWD turbo transmissions are about 1700-1900 bucks, but they maybe able to be modified to mount in the mirage. The non-turbo transmission for an eclipse is an F5M22 just like the 1.8 mirage but without the extra mounts. My Car ran 11.81 at 121.9 mph last year with a stock long block and a small 16g. I used a 1.8 liter transmission I bought from a junkyard. My Colt had a cable clutch from the factory, so I just switched it to hydraulic style by changing to a 1.8 manual pedal cluster, had to drill a couple holes in the firewall to mount the master cylinder but it was no big deal at all. I paid about 50 bucks for the pedal cluster, master cylinder and slave, and the lines to run to the transmission. So you really don’t need to worry about finding a 1.8 car if you are willing to switch it over. I have to agree with Bill (AWD92GSX) on the ECU differences, I would much rather use a 1g ECU and wiring with a 2g MAS. That should be good up to around 500 hp. But if you are trying to use a 2g motor use the 2g ECU. Here is some of the info you were looking for, the transmission that I originally used was a F5M21 (1.5L Tranny) and I just recently changed to a F5M22 (1.8L Tranny) and all the hydraulic system it uses. To tell you the truth the F5M21 held up to the power better than the F5M22 and if you are going to use the non turbo engine I wouldn't mess with switching them as of yet. I was able to run 12.5 sec at 114mph with the F5M21 transmission on slicks and launching at 5000rpm. You will need to switch the plate between the engine and transmission from the 1.5 to the 2.0, it mounts behind the flywheel, so you can use the 1.5 starter, which works fine even for the 2.0L no problem. You will also need to use the flywheel and clutch from the 2.0 non-turbo you have, the turbo upgrades won't fit in a F5M2X type transmission, try ACT for an upgrade they are the only ones that work for me. My car had no black box by the driver’s headlight from the factory, so it was not an issue. Besides none of the wiring came from that side except the oil pressure light wire.
This is all the info that I have. Enjoy reading it, I hope that it helps out some of you who are actually doing the swap.
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