I would put the IAT sensor in the plastic part of the intake to avoid heat soak from the aluminum TB. As for the IAT, post up a wanted ad on supraforums.com. I ordered both the iat and jdm map sensor the other day for less than $100 from someone there.

currently looking for the resistors for the o2 heater, I already have a good sized heat sink, just need to make a braket, get my FFIM finished up and it should be running in a few weeks..just moving slowly, may have a C5 taking some space in my garage soon.

 

I like to put the map sensor on the large vacuum spot right next to the diagnostic connector on the intake manifold. I get a very good reading from this spot.
Normally this line runs from the manifold to the power steering idle up switch (on the PS reservoir). you don't really need this and you can take both hoses off the switch, put vacuum caps on them, and use the open spot on the manifold for the Map sensor. the second hose from this switch goes to a hardline which crosses the front of the block and connects to the intake piping via another hose. you can take that hose off and cap the intake pipe.
the hardpipe does not need to be capped if you take care of both sides, its a good line to use if you want to run a line to your BOV thats on the other side of the engine though.
(Update) I have actually put back in my power steering vac hoses and the car responds much better now, I no longer recommend doing this unless you don't care about the variable power steering working properly. just T some other lines together to free up a spot and use that one.

As for the IAT, if you are turbo put it in the I/C piping just before the throttle body and away from the turbo housing as possible.
If you are n/a you can put it in the intake pipe basically anywhere before the throttle body.

 

Some help with finding the right jdm TT ecu.

Stolen from Aristo Club:
http://clubaristo.net/forums/showpos...2&postcount=31 + Random google results.

Aristo ECU Part Number:
- 89661-35060 (91-93)
- 89661-30870 (93-97)

Supra ECU Part Numbers (Auto, J-Spec, NA):
- 89661-14600 (93-97)
- 89661-14810 (97-99)

Some more jspec ecu #'s
Supply various ECU for Toyota all series:

Supra ECU Part Numbers (Auto, J-Spec, TT):
- 89661-14490 (9305-9310)
- 89661-14491 (9310-9605)

Supra ECU Part Numbers (5Spd, J-Spec, NA):
- 89661-14610 (only number listed)

Supra ECU Part Numbers (6Spd, J-Spec, TT):
- 89661-14500 (9305-9310)
- 89661-14501 (9310-9605)
- 89661-14770 (9605-9709)
- 89661-14830 (9709-)

Aristo ECU (JZS16#)
- 89661-3A470 (9708-0007)
- 89666-30180 (0007-)

From what I can find it seems that both Denso 175700-3422 and Denso 175700-3423 = Toyota 89661 30560 which is the 91-93 Aristo ECU

1AZ-FE GAIA ACM10 A/T 89661-44310
1FZ-FE 89661-60160
1G-EU GX71 89661-22120
1G-EU GX71 A/T 89661-30202
1G-EU CROWN GS-136 M/T 89561-30130/079700-1711
1G-FE 89661-22411
1G-FE A/T 89661-22411
1G-FE A/T 89661-22450500
1G-FE GS130 89661-30360
1G-FE GX100 89661-22860
1G-FE GX100 A/T 89661-22820
1G-FE CHASER GX100 A/T 89661-22820
1G-FE CROWN GS151 A/T 89661-3A560
1G-FE MARK II GX100 A/T
1G-FE MARK II GX90 A/T 89661-22450
1G-FE MARK II GX90 A/T 89661-22450 / 175700-4501
1G-FE BEAMS GS151 A/T 89661-3A560
1G-GEU CROWN GS121 A/T 89661-30190
1G-GEU CROWN GS121 A/T 89661-30191
1G-GTE 89661-14052/175000-1140
1G-GTE GZ20 A/T 89661-24210/ 175000-2131
1G-GTE SUPRA GA70 A/T 89661-14390
1G-GTE SUPRA GZ20 A/T 89661-14052
1G-GZE A/T 89661-22300
1G-GZE MARK II GX81 89661-22300 / 175000-1752
1GZ-GE CHASER GX100 A/T 889661-22820/175700-8624
1JZ MARK II JZX100 A/T 89661-22740
1JZ-FSE GX110 89661-2A11U
1JZ-G CROWN JZS141 A/T 89661-30830
1JZ-GE 88650-22591/177300-1620
1JZ-GE 89661-22520
1JZ-GE JZS141 A/T 89661-30830
1JZ-GE JZX100 A/T 89661-22740
1JZ-GE JZX81 89661-22380
1JZ-GE CHASER JZX100 89541-22180
1JZ-GE CHASER JZX90
1JZ-GE CRESTA JZX100 A/T 89661-22500
1JZ-GE CRESTA JZX100 A/T 89661-22740
1JZ-GE CROWN JZS141 A/T 89661-30620
1JZ-GE CROWN JZS141 A/T 89661-30830
1JZ-GE CROWN JZS151 A/T 89661-3A210
1JZ-GE MARK II JZX90 89661-22520
1JZ-GE VVTi CHASER JZX100 89661-22760
1JZ-GTE A/T 89661-22470
1JZ-GTE JZX81 A/T 89661-22400
1JZ-GTE JZZ30 A/T
1JZ-GTE MARK II JZX90 A/T 89661-22470
1JZGE(TCR) JZX-90 ДВ 89661-22520
1JZGTE CHASER JCZX90 ДВ 89661-22610/175700-6441

2JZ-GE JZS-157 A/T 4WD 89661-3A521/175300-2640
2JZ-GE JZS155 M/T 89661-3A170
2JZ-GE JZX91 A/T 89661-22680
2JZ-GE CROWN JZS135 A/T 89661-30780
2JZ-GE CROWN JZS143 89661-30520
2JZ-GE CROWN JZS143 A/T 89661-30530 / 175700-3445
2JZ-GE CROWN JZS145 A/T 89661-30530
2JZ-GE CROWN JZS151 M/T 89661-3A170
2JZ-GE CROWN JZS155
2JZ-GE CROWN JZS155 A/T 89661-3A120
2JZ-GE CROWN JZS155 M/T 89661-3A170
2JZ-GE SUPRA JZA80 89541-14040
2JZ-GE SUPRA JZA80 A/T 89661-14600
2JZ-GE VVT-I JZS155 A/T 89661-3A130
2JZ-GTE 89661-30560/175700-3422
2JZ-GTE ARISTO JZS147 A/T
2JZ-GTE ARISTO JZS147 A/T 89661-30560

 

^^ good info, thats the list I used to verify my JDM 6speed gte ecu, but I haven't used the ecu still.

 

question,

would the injectors fit in our fuel rail, i ask because arent the tt injectors different than the na injectors? (side feed vs top feed)

 

you are correct, the TT injectors will not fit on the ge fuel rail, they are side feed vs top feed.
you will need 440cc injectors off a mk3 turbo 7m-gte or 550cc injectors of a turbo II rx-7.
those are more or less a direct swap. the mk3 turbo injectors require a resistor pack, the rx-7 ones do not.

 

ah ok, that clears it up because i was bit confused based in the first post when you said "injectors: 440cc (JDM) or 550cc (US)" i thought you meant we could use the 440cc injectors that came off of the jdm/aristro or 550cc usdm tt injectors. but i got it now.

 

I see why you were confused now, those are just the original ecu's injector size information and you wanna try and match with similar size.
The 2jz-ge rail cannot use 2jz-gte injectors. It would be nice if we could because they are so cheap to pick up.
Im personally using the 550cc rx-7 injectors and they have worked great for me so far, i sent them off to WitchHunter Performance and they cleaned them up real nice.

 

Ali the Supra is up and running lol, i couldnt believe it was the crank pulley lol.
Thanks for your help.

 

Time to bump this up, is this doable on a obd2 1997 SC300?

 

honestly ive never even seen a 97 ecu, so i dont even know if the connector is the same with the odb1 ones, and even if it is you would loose your odb2 stuff (not good for emissions).
Maybe the VVTI gte ecu has the same connector, not really sure
VVTI GTE ecu is probably the only bet to have 1 stock ecu controlling everything and being odb2 compliant (even if the plugs are different you can make a jumper harness).

If you dont care about loosing odb2, you could just run an odb1 sc300 harness and odb1 GTE ecu (or AEM).
people who dont have to worry about emissions do this and run an AEM, same principle.

I have heard of odb2 cars using the stock ecu for all the main stuff, and controlling the injectors and ignition off of another ecu (normally an aem but again you can also use an odb1 gte ecu). This setup retains the stock stuff but give you proper fuel and timing.
the main problem with this method is alot of wiring is involved.
only reason i know of this is cause alot of IS300's run dual ecu's at first so check that out in your searches. an easier alternative to this is to just run the stock ecu + an FIC which is a piggyback that basically does the same thing, sends its own signal to the injectors and coils.

 

Thanks bro, yea the aem fic was my second option but couldn't find a ecu/wiring diagram for the 1997 obd2 sc.

 

I found this video. Not sure why he hasn't posted any info in this thread.

The sound is pretty bad so it makes it sound like it doesnt run very well.

http://www.youtube.com/watch?v=m8Oi_...ure=plpp_video

 

that one sounds horrible, must have messed something major up.

this one sounds better, but i think he abandoned the project after this video.
http://www.youtube.com/watch?v=jmj4jmCeFKA

 

Has anyone successfully installed a JDM TT ECU on a NA-T auto car?