6g72tt swap to 4x4

Printable View

02-11-2020, 11:06 AM
suedenoose

6g72tt swap to 4x4

Hey guys I’m new here, I’ve tried doing all kinds of research and just can’t find a lot of info. Wondering how much of a direct swap would it be to take the v6 out of a 4x4 Mitsubishi and replace it with a 3000gt twin turbo version? All I’ve been able to find out is that the driver side turbo iirc will hit the steering shaft or something like that. If this is true how do you get around this and what other kinds of hiccups are there? I know I’ll need the ecu and harness along with the engine, anything else that will be needed for the swap?
02-11-2020, 12:47 PM
geezer101

Hi and welcome to mightyram. There are a ton of ancillary components hanging off the transmission end of the engine - coil packs, coolant manifolds etc. These will need to be either relocated or modified to get adequate engine to firewall clearance. The throttle body is facing the wrong way so there will be intake manifold mods to correct it's orientation. I think the external waste gate on the drivers side turbo will be lethally close to the firewall as well. You will need to think about the brake booster and master cylinder position as it's going to be tight (a booster and BMC relocation isn't out of the question - you will need to use a remote slave to actuate everything) It's do-able, but be prepared to do a lot of thinking out of the box for problem solving as AFAIK you will have the ONLY V6 TT Mighty Max conversion. Your steering issue may need a radical approach to solve it. Something crazy like swapping the steering hubs from either side and retrofitting a rack and pinion set up from behind the front cross member. I'm not a 4x4 guy so I don't know how the front end is set up on a Max...
02-11-2020, 12:58 PM
suedenoose

Thanks for the reply! I didn’t realize no one else has done this, I assumed it would be a more popular swap seeing as they are the same block. I also have seen people have swapped the 6g75 in and other various 6gxx in. Would these be an easier swap for some more power? Thanks!
02-11-2020, 01:09 PM
geezer101

We have a member who has done the Mivec 3.8L swap - Chargerx3. He used a mid 2000's Eclipse as a donor vehicle and it is a beast. Build thread is here - http://www.mightyram50.net/vbulletin...-Max-4X4-Build

I don't want to discourage you from being the 'first guy to jump' for building a 6G72 turbo. you will end up with a mad machine after the hard work but it's going to take planning and $$$ to get there.
02-11-2020, 02:53 PM
B-Line

A twin turbo set up would be really nice to see. Chargerx3 has got a mean 3.8L Mivec build. Cant say ive seen anyone else try it on here.
02-11-2020, 03:57 PM
Chargerx3

Quote:

Originally Posted by suedenoose

Hey guys I’m new here, I’ve tried doing all kinds of research and just can’t find a lot of info. Wondering how much of a direct swap would it be to take the v6 out of a 4x4 Mitsubishi and replace it with a 3000gt twin turbo version? All I’ve been able to find out is that the driver side turbo iirc will hit the steering shaft or something like that. If this is true how do you get around this and what other kinds of hiccups are there? I know I’ll need the ecu and harness along with the engine, anything else that will be needed for the swap?

How well do you know Mitsubishi powertrains and how comfortable are you working on engines and electronics?

I wouldn't tackle something like this unless you were reasonably comfortable. I own several 6G7* powered vehicles, several of them Twin Turbocharged. If you read my 90 Mighty Max build thread you will notice that I contemplated at one point putting a TT in the truck but ultimately opted out for a 3.8L MIVEC.

The good news is that the engine will bolt right up to the V6 transmission. Even get to use your same starter. Motor mounts "should" work, but you may need to weld weld on them a little to make all the bosses work. Fuel rail will work, but will need to swap fuel pump out for better LPH. Your 91 has the correct maf, so you are already ahead of 90's guys. Intake manifold is no biggie, get a 3rd gen montero one just to get started. Better, but more difficult to find and adapt options are out there. Exhaust manifolds will be a challenge. I havent tried to drop my TT motor in yet, but one will have to get creative. Will likely need to make your own from scratch. Cooling components will all need to be stolen from a 94-96 Montero SR. Only those have the same heads to tie everything into. Oil pan might be a challenge, but there should be some other options out there. Wiring will be the hardest. I made a conversion harness, so that I could run a 98-99 3000GT Vr4 programmable ECU. Plotting out all 100+ of those wires is a PITA. I can now run stuff like coil packs and electric fans, variable intake, etc. The last difficult item for you to tackle is the Intercooler and all its piping. That was the main reason why i didnt do a turbo build. There is very little space in front of the radiator and I didnt want to tackle that at the moment.

I wish you luck. I haven't forgotten about doing a TT 3.0 build. Maybe if I get more time I can do it to my other v6 truck, or the Montero. Time will tell.
02-12-2020, 05:41 AM
Salteen

i have said it in another post ill say it here, dodge has some DOHC V6 engines that are as big as 4 liters. thats pretty big. slap a turbo or 2 on it and bam. best part is its based off the 6g engines. so it probably has the same bellhousing pattern. you still need to check with the flywheel and starter and make sure it will work. I am a 4 cly i6 v8 guy myself, but a v6 can be a good engine if you do it right.

the dodge versions I think may have been 60 degree Bank if I'm not wrong that may just be for the OHV models. that would mean there is a bit more room to work with. hell you could do alot of stuff with a 60 degree Bank. you could do a moniker like I am! I really want a 2WD truck to build for a moniker but I can just call mine the SRT4 4x4 edition. Do you have any pictures of the truck? exactly what is it, ram 50, mighty max, arrow, L200, raider, montero, what?
02-12-2020, 08:38 AM
Chargerx3

Quote:

Originally Posted by Salteen

i have said it in another post ill say it here, dodge has some DOHC V6 engines that are as big as 4 liters. thats pretty big. slap a turbo or 2 on it and bam. best part is its based off the 6g engines. so it probably has the same bellhousing pattern. you still need to check with the flywheel and starter and make sure it will work. I am a 4 cly i6 v8 guy myself, but a v6 can be a good engine if you do it right.

the dodge versions I think may have been 60 degree Bank if I'm not wrong that may just be for the OHV models. that would mean there is a bit more room to work with. hell you could do alot of stuff with a 60 degree Bank. you could do a moniker like I am! I really want a 2WD truck to build for a moniker but I can just call mine the SRT4 4x4 edition. Do you have any pictures of the truck? exactly what is it, ram 50, mighty max, arrow, L200, raider, montero, what?

That info is incorrect. Those Chrysler engines are not interchangeable with these vehicles. They are not based off of the 6G motors. They are Chrysler's own design. The 4.0L isn't a great performer either at 260Hp for its size. You cannot "just slap a turbo" on them either. In the case of your 4.0 the internals are not up to par and that engine is already 10:1 compression. No go.

The OP should however stick to motors that can bolt up to his existing drivetrain like the 3.0L SOHC that he has, 3.0L DOHC, Turbo, a 3.5L, or a 3.8L. Many of which are built to handle high levels of HP. Quite a few guys making 1200 HP on the 3.0L Turbo block, and the 3.5L Montero SR blocks. Stick to those as they are well proven.