FRCEF3D Mits build thread 4G63t DOHC swap/vr4 big brakes/air bags

[DroppedMitsu]

Thought I'd start a build thread since I'm going to be swapping in my 4g63t in a few weeks and I've already started pulling things apart. I'm going to be running a stock 6 bolt 4g63t from a '91 Mitsubishi Eclipse. I already had this engine in my previous truck so most of the major fab work has already been completed.

List of parts needed and/or mods to complete swap that I used to complete swap:
*4g63t and all manifolds/sensors/etc.. from 90-92(preferably) Eclipse/Talon/Laser
*Engine wiring harness, ECU, and MPI Relay from same vehicle
*Shorten/Lengthen engine harness wires as necessary to reach their new position and power/ground the ecu/mpi relay
*KM132 4 or 5 speed manual transmission from late 80's 2.0l Mighty Max/Ram50 with g63b engine
*Motor mounts from 2.0 truck, but fab'd to move engine 1 7/8" forward so CAS and thermostat housing will clear firewall.
*Lengthened driveshaft to go with motor mounts
*Make throttle body flange and weld to front side of intake manifold
*Waterpump from 87-89 g63b 2.0l modified to clear timing components
*Waterpipe from 87-89 g63b modified to accept turbo and throttle body coolant lines
*1.8L eclipse thermostat housing top(aims directly to side instead of angle towards firewall like 2.0dohc top)
*Custom intake and intercooler piping.
There is a few more I will add as I remember them.


Apart for new seals and gaskets


You need to grind down the ribs on the truck water pump so that the timing belt pulley will clear it

Will update this this week as parts come in

[4doorciv]

To veiwers, there are other ways to clear the cas and waterneck but it's proven that moving the engine forward makes for a way more cleaner look.

Thermostat housing, are you using the 1.8 straight housing or the 2.0 angled one? I know there are others without the radiator cap as well. I forgot if you mentioned this before.

[DroppedMitsu]

Yea there are a few ways to do the swap, as I stated this is just how I chose to it, for the most OEM appearance and cleanliness IMO.

I'm using the straight thermostat housing cover from the 1.8 eclipse

[DroppedMitsu]

Ok, here's how I modified the stock truck waterpipe that comes off of the water pump. I had to do this due to the turbo and oil filter housing having coolant lines running to them and me running the truck water pump and waterpipe which do not have these fittings.

Spot added right behind pump for coolant line to oil filter housing.

You can see the second big fitting I welded on(came from stock 2.0l DOHC waterpipe). This goes to the turbo. The aluminum tubing behind the turbo is the outlet(or maybe inlet, can't remember which is which) for the coolant that I made.

Another view of cooling lines to and from turbo.

This pic shows the aluminum tubing(3/8") I made to run coolant to the throttle body like it does stock. I figured this was the best way to get coolant there since the throttle body has been moved to front of engine for RWD purposes.

Another shot of the lines to throttle body

Connecting to throttle body.

Hope to put motor in engine bay this weekend and find out all what else I need, should only be some intercooler couplers and few random things

[DroppedMitsu]

My modified motor mounts to move engine 1 7/8"(what I chose to move it) forward

Showing difference of 1.8L cover(parrallel with engine) and 2.0 4g63(pointing towards firewall)

Ready to go in

It's in!

Since I had already done all the wiring troubles on the swap before, I only had to connect these three wires to power my harness/ecu/mpi relay

How she's sitting after the 5-lug swap and new wheels

[DroppedMitsu]

Well I've been getting everything mounted and connected, etc... All I have to do is get my alternator wiring done and finish the exhaust from the end of the cat to the back and it should be done. Hope to start it by the end of tomorrow and possible drive it too since my driveshaft is supposed to be done also

Got the intercooler in its place so I can retain my A/C. Its size is 27x5.5x2.75. It fits right under the a/c lines and the piping goes right around them. Sticks right through the middle of the bumper so should see plenty of fresh cold air.


I will get more finished pics of everything when I put it back together for the final(for now) time.

[DroppedMitsu]

Its running and almost driving, should be driving it tomorrow. I still need to reattach my exhaust under the bed and install my driveshaft. I also need to figure out what is causing me to still have a small idle surge, other then that its good to go. Still needs some cleaning up and permanent mounting of some stuff but she's basically done for now.

[Payrion]

where did the solid chrome grill come from...all them i find have black with chrome

[DroppedMitsu]

Take the black paint off with acetone or nail polish remover or something like that and there will be chrome underneath

[Payrion]

no crap..your the shit man..thanks for the tip!

[DroppedMitsu]

Took some pics today:

[LethalEthan]

looks great! your wheels look like they fit pretty well, do they tuck?

[DroppedMitsu]

Thanks Ethan. Yup, they tuck with ease, 18x8 +45 offset

[DroppedMitsu]

Got a new all aluminum radiator for the truck, the old one was falling apart and I think leaking a little too. This one was $135 shipped, got it from sheperdautoparts.com , they are also on ebay for a little more depending on which truck you have. It is of pretty good quality and definitely cant complain for the price, everything fit like the OEM one also.

[crvtec90]

Good job man! I would love 2 get my a/c workin again.....where is the intercooler from?

[DroppedMitsu]

Thanks, the intercooler is just an ebay one. Yes I need to gt my a/c hooked up again, gonna have to use the eclipse a/c compressor so probably have to get two lines remade

[Rickdees]

Aluminum radiator makes the engine install so much cleaner looking. Good job!

[DroppedMitsu]

Yes they do, thanks rick. I've been wanting one for a while, and I finally needed it(oem was falling apart) and had some extra money.

[camoit]

no crap..your the shit man..thanks for the tip!

So was there chrome under yours????????
The world is holding there breath.

I should sell space in my PO box to people. $25.00 per year sounds good to me. Just keep in mind that I have found that the DMV or post office screws the pooch on the address all the time. The address reads like this. 126 main st #12-147. They seem to miss the 12-147 and send the mail back to the DMV or the DMV forgets to put on the 12-147. I just keep an eye on the tag and send them the money or you can walk in and get a tag. I just don't care. If they have the money the cops show it on there system. When they ask or if they wright a ticket then I'll fix it. Screw the Government......

[LethalEthan]

all black and chrome grill's have chrome underneath the black, not sure if the solid black ones do.

[DroppedMitsu]

Painted my rims black, I like it better. Still have to do the other two though, a lot of masking and prep and stuff lol.

[Payrion]

looks great

[camoit]

Now with a new shiney sticker on the plate.

[DroppedMitsu]

Thanks guys its coming along slowly.

Finished painting the dash for the most part, still need to do the ash tray, fuse cover, and glove box but its back in the truck at least. Heres a pic for now, I'll get some more clear pics after i finish the other pieces.

[LethalEthan]

nice! looks smooth