4G93T-Mivec?

[fras]

Firstly does it make sense and how simple is it?


What would I need for the head conversion?
Complete head with coil packs, plug wires, solenoid, timing belt, head gasket... What else?
Speaking of head... I was told the the 93T head flows more than the mivec? If so I would need to port and polish?


Would I need to change to the mivec harness or could I engage the mivec solenoid via piggy back or switch (greddy mss)?


How hard would tuning be?
On boost with no mivec and on boost with mivec?

[MISHI]

From Mivec.co.nz:

This is a basic guide to the parts you will need if doing a 1.8 Hybrid.

Block
4g93 DOHC turbo block has oil squirter's for the pistons, all other 4g93 DOHC/SOHC don't but all will fit the 4g92 mivec head.

Crankshaft
4G93

Rods
4G93

Pistons
4G92 Mivec or Custom to suit desired compression ratio

Headgasket
Head gasket is 4g9x from .5mm (standard gen2 mivec) to 1.5mm(fibre/carbon fron gen1 and GSR)
A 2mm copper/custom gasket is needed to bring CR down to 11.0:1 in a 4g93 with 4g92 mivec pistons.

4g93crank + 4g93 rods + stock piston - 4g93 block height = 0mm
4g93crank + 4g93 rods + mivec piston - 4g93 block height = +1mm
There are high compression 4g93 pistons in a GDI that may work but they maybe 12:1 already.

Cambelt
4G94 159 tooth is perfect

Gearbox
Factory 4G92 Mivec Gearbox
Clutch & Flywheel: Factory 4G92 Mivec

ECU
Minimum is a piggyback but a full aftermarket recommended for optimum performance.

Injectors
390cc (from GSR Turbo)

Notes
Nothing 4g6x fits other than the spring shims in the head and injectors. Gaskets and fuel rail etc have different bore spacing and sizes.

A hybrid turbo will be a GSR bottom end with mivec head and longer belt, so much simplier than building a NA.

There is a long thread somewhare on that same site I'll search and send the link. U may have to register though...

[MISHI]

I should also note the few I've read so far have blown their motors...

[fras]

I should also note the few I've read so far have blown their motors...

Thats not cool dude


The boost on the stock turbo starts falling off at 6000rpm... Would the mivec make a difference for the other 1500rpm till red line?

Would really like to see if and how much more power a stock mivec head would make... Tuned at stock boost

Imagine getting full boost at say 3000rpm, then mivec engages at 5000rpm

[fras]

Got this from the 93T site which was closed down that site had everything u need/wanna know about this engine

Replace the standard head of the motor with the head from a 1600cc Mivec this will give you the ability to have Mivec turbo (we have all seen VTEC turbo kick ass, why not try it). The Mivec head will bolt straight on to the turbo block; obviously you will need a new head gasket, cam belt and cam belt tensioned though. This would be a good way to get rid of the typical Mitsubishi death rattle (noisy lifters)

The above gives you a whole new area of development to play with, bigger valves, cam timing etc.

The head alone will not make much difference till you have some form of RPM switch to control when the cams change profile/lift etc. For this you could use a $15 RPM switch from Jaycar electronics, which will simply turn the Mivec on at the desired rpm. Alternatively you could use a Field type Vtec controller ($500ish) with adjustable fuelling etc, similar to an Apexi super AFC ($900ish) this will also help you to set up the correct fueling. Or if you wanted to go the whole hog you could always get a link computer or similar

[MISHI]

I should also note the few I've read so far have blown their motors...

Thats not cool dude


The boost on the stock turbo starts falling off at 6000rpm... Would the mivec make a difference for the other 1500rpm till red line?

Would really like to see if and how much more power a stock mivec head would make... Tuned at stock boost

Imagine getting full boost at say 3000rpm, then mivec engages at 5000rpm

Why not just put on a td05? boost at 3000 right up to redline... but then again you might end up with the same situations as i read so far...

[fras]

^What u heard about the TD05 swap?

I just like the idea of mivec and turbo
The honda and nissan guys have done it... Why not mitsubishi? Although the evo's 9 and 10 came mivec/turbo...

[wagonrunner]

i think Glitch's libero was a mivec turbo.
which to my knowledge worked well to the day he sold it.

pm him, see what he says

[MISHI]

The 63T mivec works differently to the MIVEC in the 4G92s I believe...

[Glitch]

Sorry I just had the 4G93T engine with MIVEC gear box. I wanted to do that swap as I had everything for it...but management was the issue for me at the time and someone good enough to do the parts swap itself.

The original turbo itself is pretty small thats why it gets out of breath up top. I would go with mishi's idea of a bigger turbo for more flow and some head work. you would save yourself alot of time and headache

[fras]

Thanks bro

[SCHOLARS]

fras i looking to do d same project right now so let me know how yours going

[fras]

you have a very long wait... Them guys discourage me

[xtech]

guys running this with 63T ECUs re-wired and tuned down with ECU-Flash for the 93T.
Till they realized that the Evo ECUs complete program could be flashed over to the Lancer ECU

so management is not a big problem anymore.............just the tuner and the builder

[fras]

Was researching many ecu's... From piggy back to evo to stand alone
I even have an ecu pin out to make wiring simple/quick

But I think I have got it down to a piggy back (greddy ultimate if not aem fi/c) as i'm not going all out