my old scrap

Alternator is the same, you can even get a adapter to run later oval plug alternators, will discuss the harness later

The gen1 pipe is a dog compared to the gen2 and prone to cracks, you'll have to mate it to your pipe and fit a O2 sensor as well, swap to a 3/4 wire sensor now while you can, (pics etc are on my thread) ditch the cat too while you can.

Rack should be identical, not sure if the ABS has sensors on the rack like the Curren I stole one from.

As for the wiring you are going to have to split the harness open and replace the ECU, gen2 has different style injector plugs, dizzy plug etc. There is no AFM or T-VIS on the Gen2 either but it has MAP sensor and knock sensors fitted as well as a 4 wire O2 which runs down the back of the motor

If you are not confident I suggest getting a sparky to help you! One thing I have been meaning to do is to split the harness and run the alternator, thermostat and A/C wires across the radiator, saving a lot of crap running around the head and making teardowns easier.

 

I wondered about that

Also I noted you have a branch already, show us the branch but I fear it has the wrong firing order

 

The box is your igniter (CDI) unit, should be a plug for it on the MR2 harness, I think on the MR2 it sits near the air intake/distributor.

Split the MR2 harness open, keep only what you need from the ECU to the motor, use your exsisting Alternator, A/C wiring, fuses etc.
Lucky the MR2 ECU sits in the boot, roughly the same position as ours but closer so the wires may be too short or fit the ECU below your cubby

One problem you will face is to swap the fan sensor to the MR2 waterpump housing, lucky the MR2 has a threaded hole for it, ST182 doesn't.
You will note the gen2 thermostat is bigger and pipe is different but the pump itself is swappable.


For now I suggest using your old exhaust (Its a Genie?), you're going to have to cut the MR2 header way before the O2 and make a new section - may as well make a whole new bigger xorst as the gen1 is pretty skinny with a cat under the gearlever.

ABS brakes are weird, never seen them here on AT/ST16x's - calipers look similar to ST202 items

 

Here's the pics of my gen2 header conversion
http://www.st162.net/forum/showthre...ore-jdm-oddities&p=40513&viewfull=1#post40513

 

The header wrap is nice at 1st but unless you use expensive high temp wrap (1000deg +) it decays fast.
Be sure to use thick gloves as the fiberglass goes right thru surgical gloves, I did it to stop the bonnet liner getting burnt but even with the wrap and a heat pad on the bonnet it still takes a lot of heat.
Moving the flange forward was one of my best ideas, easy to drop the sump without touching crossmembers etc

I ran like that cuz I couldn't find the screw in filter holder, I also ran without the cooler for a while but the oil definitely stays cooler with it working when the motor is pushed hard,
Without it I nuked my oil in 7 laps and lost all oil pressure - for the new motor I'll be fitting a air/oil cooler instead

 

stiggles, would you not fit the OEM filter air/oil cooler?

 

No JDM has an air/oil cooler or I would.
I have a gen1 GTE block on the bench, Dave has made me a turbo feed blanking spacer but I'm thinking of using that to run an a/m air/oil cooler as well as the GTE water/oil cooler - overkill?
ps. my idea of an oil cooler is equivalent to an RX7, VW type4 or similar. Another idea is to use gravity feed from the sump to an external cooler and back to the sump

 

i might have a spare holder if your interested, but you might need to run your own lines?

 

Which one? I had to raise my rear mount years ago when I used the wrong rear bracket.

Yes, you'll have to make your own harness, use aircraft quality waterproof connectors or you will have problems later

About time

Make it up or I can find for you

I think you'll need a ST182 airbox and inlet pipe too

 

Like I said before you have to cut out the old ECU with all it's wires and replace it with the new ECU and wires while not disturbing the charging & lighting circuits.
It's similar to fitting an a/m ECU on any motor and we are currently fitting a LINK ECU to Sergei's ST205 GTE/ST165 and Oompa is doing the same fitting a ST215 GTE to his ST165.
Any good auto elec will do it easily.

You'll need the ECU diagrams for both ECU's to do this properly, this is why I decided not to use my gen2 motor and opting for a GTE head/GE TVIS manifold
The gen1 GE has a lot more wiring than the Gen2 and no the plugs aren't compatible

The other option is to do as Bluestreak did and keep the gen1 harness/distributor/injectors/TB/AFM on the gen2 motor - it does work but there's some modding to do to get the throttle body working properly and the gen1 injectors are too small (imo) for the gen2 motor. Most here don't know but our JDM has square plug injectors while the rest don't


The water pipes need to be swapped, MR2 has totally different radiator pipe setup
The mount can be used but you need to grind the centre down to fit the gen4 chassis, you may as well remove the top stud as well, the alt brace is a w.o.t. imo




I can find whatever you need so just let us know

 

yep itl bolt straight on

 

My block is a gen2 block

I'm getting the MR2 manual on CD this week and will forward it to you