Ogre

Bolt in Mitsi engine upgrades

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Blatantly plagiarized from another site, but still good info:

After seeing so many people asking about the engine swaps available in any of their mitsubishi cars i thought I would start a thread that could potentially become a sticky. There will be some things that i don't know and maybe some mistakes about some of the engines but I can update the original message with any information anyone wants to add.

I'll start with the easiest and cheapest first and then you can work out what would be best for you car.

Pretty much all of the mitsubishis on this site will allow for the same engines to fit in but there are a couple of small differences between the models that require a little tweaking.

Engine options

Carb 4g63 2L N/A

Carb 4G52 2L Turbo

Carb 4g54 2.6L N/A

EFI 4g54 2.6L N/A

EFI 4g54 2.6L Turbo

EFI 4g63 2L DOHC N/A

EFI 4g63 2L SOHC Turbo

EFI 4g63 2L DOHC Turbo

EFI 4g64 2.4L DOHC Turbo

4g54

This engine comes with a few potential differences

Narrow bellhousing

Wide Bellhousing

Astron 1 = First gen of the 2.6 engine found in the early sigma and is most easily identified by rocker cover being flat from the back to the front of the engine

Piston Type: Dished

Compression Ratio = ???

Astron 2 = Second Gen most easily identified by the raised level at the back of the head.

Piston Type: flat or valve relief design

Compression Ratio: ??

There are multiple heads available for this engine with the later model Magna heads flowing the best of any of them but that kind of detail on every head would be best for a different thread. The biggest difference is between the Astron 1 and 2 with differences with the inlet and exhaust manifold shapes.

Note for the 4-2-1 extractors for the 4g54 that suit the sigma/scorpion/Triton won't fit the galant/lancers unless the 2 pipes are on top of each other as they usually hit the steering box.

The steel engine mounts which come with all the RWD engines will suit fine. The galant/lancer may require selecting between the sigma and galant rubber mounts to allow it to sit fine.

Carb 4g54 2.6L N/A

Flywheel Power output = 85 KW @ 5000 rpm

Flywheel Torque output = 195NM @ 3000 rpm

Original Vehicles = Mitsubishi Sigma, Scorpion, Magna and Triton

Estimated Cost = $50-$300+

Good points:Simple, cheap, easy

Bad points: Small power increase, carby system can be unreliable

This would probably be the simplest and most affordable engine upgrade possible for any of the cars that don't have the engine as standard. To bolt into the sigma it's pretty straight forward and just sort out the minor wiring for the dizzy and starter motor. For the galants/lancers the clutch fan may require to be changed for some electric thermofans due to space restrictions or on the gc/gd you can just remove the radiator spacer.

The easiest option is to go for a a RWD variant of this engine as the FWD from the magna needs to have the timing cover, water pump and inlet manifold need to be changed from the RWD version to fit anyway.

EFI 4g54 2.6L N/A

Flywheel Power output = 102 KW @ 4750 rpm

Flywheel Torque output - 220 NM @ 4000 rpm

Original Vehicles = Magna

Estimated Cost = $200-$500+

Good Points: Cheap upgrade, affordable, better power and fuel efficiency

Bad Points: Wiring can be a hassle, Some custom fabrication required.

This option is using the Magna EFI inlet manifold and factory computer. To do this swap the throttle body to the opposite end as it makes it easier for the inlet piping. Also you can use this manifold on a Astron 2 head or can mod it to suit a Astron 1. Probably best to use the Magna head as it would typically flow much better then any sigma head. You can choose to use the factory wiring loom and computers or you can spend a little more make wiring a little easier by changing to a aftermarket computer.

There are two different inlet manifolds available from the two different generations of Magna's. The TN/TP is the earlier and smaller manifold and plenum chamber but will fit into the galant/lancer much easier. The TR/TS model have the larger plenum but require the runner to be shortened to fit Galant/Lancer. Both will fit the Sigma.

Draw Through Carb 4G52 2L Turbo

Max Power 116.4 KW @ 5200 rpm

Max Torque 235.3 NM @ 3200 rpm

Original Vehicle = GH Sigma Turbo

Estimated Cost = $500-$800+

Good Points: Straight bolt in engine

Bad Points: Difficult to find, Often need work to get running, replacement parts difficult to find, narrow gearbox only

This engine originally was from the original sigma turbo although very few actually still exist as complete factory. They come with a Single throat side draught Zenith-Stromberg carburetor and Garrett Air Research T03 turbocharger. This engine is a simple swap but only comes as a narrow block so only the 2L manual gearbox or any factory auto can be used.

EFI/Draw Through Carb 4g54 2.6L Turbo

Max Power = Varies depending on Modifications

Max Torque = Varies depending on Modifications

Original Vehicle = Overseas Starions (or sigma turbo running gear)

Estimated Cost = $500-$(how big is your wallet)

Good points = Good power vs cost,

Bad Points = Carby can be difficult to tune, EFI more expensive

The only vehicle that came with engine standard was the starion located overseas and are very hard to find over here. Usually people build them from the previously mentioned 4g54 engine. All of the equipment from the carb sigma turbo can be altered to suit this engine easily and is typically the cheapest option. The next step up is to go for the EFI option where you use the magna inlet manifold. The factory magna computer can apparently be used up to about 8 pound of boost but most people use this stage to upgrade to an aftermarket computer system. The exhaust manifold can be gotten from the sigma turbo (modded), 2.6L starion (note: this isn't to be confused with the locally delivered 4g63 starions). The other option for the exhaust is full custom manifold.

4g63 2l SOHC N/A

Max Power = 75kw @ 5500rpm

Max Torque = 157Nm @ 4750rpm

Original Vehicle = Sigma/l200/l300/Scorpions(some had twincarb 4g63GS),Chariots.

Estimated Cost = $300+

Good Points = This would probably be the simplest and most affordable engine upgrade possible for any of the cars that don't have the engine as standard.Narrow Gearbox)apparantly some l200s and l300s are wide,yet to be seen)

Bad Points = Hard to get power over 150hp, hard to get high RPM, No sidedraft style bolt on manifold available.Standard carb is crap.

EFI 4g63 2L SOHC Turbo

Max power = 132 KW @ 5500

Max Torque = 214 Nm @ 3500

Original Vehicle = Mitsubishi Starion,Sigma GSR,Magna.

Estimated Cost = $600+

Good Points = Good Upgrade potential, Wide Gearbox, factory turbo

Bad Points = Poor factory electrical system, unreliable factory injection

This is an option to be considered if you are looking for a bit of extra power and plan to do further upgrades in the future. It has a little less power than the 4g54 turbo but it is already in a RWD setup so fits into all of the RWD cars easily and the gearbox is stronger with a hydraulic clutch. The computer system is very dated and can be very unreliable due to it being 25 year old eighties electronics and also has a pretty crappy fuel injection system. Often replaced with an aftermarket computer and go to a multipoint setup. It has plenty of potential for upgrades such as the multi-point inlet manifold can be used from the Y2 sonata or L300 and the L300 head can bolt on and retain all the factory manifolds. Or the head can be replaced with VR4, EVO1-3 and sonata 2L DOHC heads but this requires a new custom exhaust manifold.

Note - Rwd engine(eg starion/sigma) are wide block, FWD(eg sigma turbo/cordia) are narrow block

EFI 4g63 2L DOHC N/A

Max power = 102 KW @ 5800 (AMG 4g63 = 125KW @ 6750rpm)

Max Torque = 180 Nm @ 4000 (AMG 4g63 = 191Nm @ 5000rpm)

Original Vehicle = Hyundai Sonata Y3 94-98 (g4cp), Mitsubishi Galant (4g63)

Estimated Cost = $500+

Good Points = Good Potential for upgrades, great torque curve

Bad Points = Custom exhaust extractors, Narrow gearbox

This engine is only available from the front wheel cars so this means narrow gearbox only. It bolts into any RWD Mitsubishi easily by just using the RWD 4g63 engine mounts found in the starions and also the l200 utes with the 4g63 N/A SOHC. There are a couple of difficulties modifications needed to the water pump, thermostat and inlet manifold but there is a large about of information available on the http://www.projectzerog.com/ website and forum. The full workshop Hyundai manuals can also be found on this site http://www.hmaservice.com/ so you work out all the wiring and computers.

EFI 4g64 2.4L SOHC N/A

Max power = 82 KW @ 4500

Max Torque = 193 Nm @ 3500

Original Vehicle = Hyundai Sonata Y2 88-93 (g4cs), L300 Van (4g64), NZ new Sigmas/Galants.

Estimated Cost = $500+

Good Points = Good potential for upgrades, more torque then 4g63,Narrow Block.

Bad Points = L300 engines hard to find in good condition, EFI wiring complexity

This is really only an option to consider if you are itching for a bit of extra power and plan on in the future going to a twin cam turbo. It bolts into any RWD Mitsubishi easily by just using the RWD 4g63 engine mounts found in the starions and also the l200 utes with the 4g63 N/A SOHC. The extractors can be gotten kinda easily as they have the same bolt pattern at the SOHC 4g63 found in the L200 and L300 but the factory electrics have the typical complexity associated with factory computers. The biggest difference between the sonata and L300 engine is that the L300 is easier to put into the RWD configuration but does cost a bit more. The Sonata one requires swapping the throttle body and a magna thermostat housing. The full workshop Hyundai manuals can also be found on this site http://www.hmaservice.com/ so you work out all the wiring and computers.

EFI 4g63 2L DOHC Turbo

Max power = 148 KW @ 6000

Max Torque = 279 Nm @ 3000

Original Vehicle = Mitsubishi Galant VR4

Estimated Cost = $2000+

Good Points = Great power output,

Bad Points = Narrow Gearbox, Popularity has driven the cost up, Mod’s required to fit, Custom exhaust manifold

This engine is considered to be a great upgrade but it does have the price tag to go with it. It bolts into any RWD Mitsubishi easily by just using the RWD 4g63 engine mounts found in the starions and also the l200 utes with the 4g63 N/A SOHC. It is only a narrow gearbox though but you can use the bottom end from a starion and change the pistons to have a wideblock. It’s more drivable then the 4g54 but more expensive too. The upside to the populatity is that the potential is there for much more power due to the availability of plenty of aftermarket off the shelf parts.

EFI 4g64 2.4L DOHC Turbo

Max power = 200kW+

Max Torque = ???

Original Vehicle = Combination of vehicles

Estimated Cost = $3000+

Good Points = Potential for big power

Bad Points = Most expensive option

This is probably one of the most expensive options possible for a 4 cylinder Mitsubishi engine but is also one with a lot of potential. This is pretty much the most expensive engine available for the Mitsubishi and few people actually have the balls to go for and engine like this. You can use a lot of off the shelf parts for this engine but you need to have the stroker crank which you can buy after market but it’s much cheaper to go for a sonata 2.4 or L300 2.4 bottom end with vr4 oversize pistons and the DOHC head from the Y3 sonata, vr4 galant or Evo 3. The biggest benefit of this combination is the benefit of the torque from the longer stroke and the benefits of the flow from the twin cam head. You can use the factory DOHC inlet manifolds but most choose to go custom due to already spending so much on the engine already.

Pics:

4g54 Turbo in Starion

jeff1.jpg

4g63 SOHC RWD in an EX (triggers project http://www.oldschool.co.nz/phpbb/viewtopic.php?f=17&t=13789)

4093620154_ce1158165b.jpg

4g63GS from GSR Sopporo in an EX (In my old EX http://www.oldschool.co.nz/phpbb/viewtopic.php?f=17&t=3136)

27st.jpg

4g63 DOHC N/A RWD in a Sigma (quad throttlebody injection)

IMG_1765.jpg

4g63 DOHC Turbo RWD in an EX (ke30s project http://www.oldschool.co.nz/phpbb/viewtopic.php?f=17&t=10955&hilit=lancer)

img0609il7.jpg

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When driving my Starions I could swear they have more torque than suggested here :lol:

214 ft.lb and 177bhp (132kw) for NZ intercooled models.

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Mint, alot of that info is oz crap so will be alittle off, ive tried to change all that i know

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yeah the Sonatas they speak of are uncommon here, more common to find the gear from a SOHC NZ-new Galant or jap import 2.4 80s Sigma.

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seriously, do you not take notice of any one elses projects at all??

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Anyone know if theseres a RWD box or bellhousing that will bolt to a 6G72 V6

The answer is pretty much W5* toyota.

Phils RWD V6 tri-diamond project here.

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LOL, is the V6 could be considered to be a bolt in?or do you think its to intense phil? lol

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or that it has exactly the same engine bay as the EX Lancer pic posted above it.

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its exactly the same colour as my celeste, thats what got me.

cant seem to delete this so i might aswell ask a something good. does anyone have any pics of any 8a80 in a oldschool mitsubishi?

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its exactly the same colour as my celeste, thats what got me

dude, stop posting worthless spam/ I am, delete this too.

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Anyone know if theseres a RWD box or bellhousing that will bolt to a 6G72 V6

The answer is pretty much W5* toyota.

Phils RWD V6 tri-diamond project here.

Cheers for that link, i hadnt seen that post befor, there are so many great conversions on this site its hard to see them all. Theres some nice V6 mitsi engines avalible, there mostly small and compact. I kinda guessed a W series box with custom bell housing would be the go. Was curiuos if any pajero bellhousings may of mated up to any RWD mitsi boxes. But then mitsis dont really make any RWD cars except old school stuff.

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hey guys so ive got a 86 l200sport 2000.. 4g63 sohc carby, wanting to upgrade what engines would bolt in with same mounts and gbox was thinking 4g63dohc or dohc turbo but might be a bit expensive atm as cant find many around what othe roptions do i have and would the dohc 4g63 bolt up to my sohc 4g63 gbox??

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You forgot to mention the vr4 block mated to an evo 4 + head.... which is a great way to position the turbo on the drivers side, and gives you 6 bolt goodness.

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