Go Back   Club Lexus Forums > Lexus Model Forums > SC Models > SC 400/300
Sign in using an external account
Register Forgot Password?

2JZGE Na-T TT Ecu Mod

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 08-30-10, 11:31 PM   #16
solprps92
Rookie
Trader Score: (0)
 
solprps92's Avatar
 
Join Date: Jul 2010
Location: NC
Posts: 72
Default

thats awesome thanks alot man
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
__________________

92 SC300 Pearl White
Stock...for now
solprps92 is offline   Reply With Quote
Old 08-31-10, 02:13 AM   #17
solprps92
Rookie
Trader Score: (0)
 
solprps92's Avatar
 
Join Date: Jul 2010
Location: NC
Posts: 72
Default

ok i kind of combined all the info in this thread into some veeeeeery crude diagrams. as i understand this is what all the wiring should look like if your putting in a jdm gte ecu with the ge harness and AEM 5Bar MAP & AIT sensors. if im wrong let me know

(the second one was the 1st one earlier, fixed it up a lil bit)
Attached Images
  
__________________

92 SC300 Pearl White
Stock...for now

Last edited by solprps92; 08-31-10 at 10:52 AM..
solprps92 is offline   Reply With Quote
Old 08-31-10, 09:31 AM   #18
turbodremz
Lexus Champion
Trader Score: (18)
 
turbodremz's Avatar
 
Join Date: Jan 2008
Location: TX
Posts: 4,798
Chris Carrasco A-wHyTe-RaBbYt
Send a message via Yahoo to turbodremz
Default

^^^ thats how I have it figured, and have already spliced and extended and added the MAP and IAT sensor clips. So I hope thats right
__________________

LS1 5.7, T-56 6-speed trans, BruteSpeed/EPP Blower Cam, Fast 102 LSXR intake manifold, 28lb/hr injectors flowing 31.5lbs, DGR Fabrication motor mounts, PSI Conversion LSx harness, F-body driveshaft, Tuned By Frost PCM with TSP cam tune, Mishimoto Supra Radiator/Shroud/Fans, QuickCar fused switch panel, Full custom Speedhut dash cluster/gauge setup, Hooker headers to 3.5" dual exhaust with X-pipe, Dynomax 3.5"x6" bullets, gutted and caged.BUILD THREAD and VIDEOS
turbodremz is offline   Reply With Quote
Old 08-31-10, 10:23 AM   #19
Ali SC3
Na-T Guru
Trader Score: (10)
 
Ali SC3's Avatar
 
Join Date: Oct 2007
Location: CO
Posts: 6,975
Default

Quote:
Originally Posted by solprps92 View Post
ok i kind of combined all the info in this thread into some veeeeeery crude diagrams. as i understand this is what all the wiring should look like if your putting in a jdm gte ecu with the ge harness and AEM 5Bar MAP & AIT sensors. if im wrong let me know
Wow, I like it. I guess i'm not the only one who still uses MS paint .
Everything is right on, except I just wanted to clarify that you wouldn't actually use a 5 bar map sensor, you would be using a TT map sensor (2.3 bar) or something very close to it, the wiring is the same for all map sensors.

As for the tps stuff you drew, you don't need to worry about that at the maf connnector, the 2 wires that are shared are +5v and ground, and they are connected together way before it gets to the airflow connector. Your diagram would be better if you removed the tps arrows. the pins on the tps connector need to be moved around though, they are all there the TT one is just upside down or something and i was told it can be swapped easily at the tps.

your second diagram is perfect just remember to use a TT map sensor and all will be good, Thanks for drawing that out!
__________________

1995 Lexus SC300 5spd Na-T ( TT Ecu Mod + a few others)

Last edited by Ali SC3; 08-31-10 at 10:35 AM..
Ali SC3 is offline   Reply With Quote
Old 08-31-10, 10:31 AM   #20
solprps92
Rookie
Trader Score: (0)
 
solprps92's Avatar
 
Join Date: Jul 2010
Location: NC
Posts: 72
Default

well see im getting all the parts this week
should start messing with wires next week
let me know how yours goes man
o hey i know that the sc o2 sensor is a 1 wire design
im getting an aristo ecu which guess uses a 3 wire
now im looking at the gte pinout and im seeing i think 2 spots that say Ox pins 47 (Ox2 signal sub heated oxygen sensor) & 48 (Ox1 signal main heated oxygen sensor)
on both the ge & gte pinouts pins 79 & 80 say "EO2/1 power ground" do these have anything to do with it?
i guess my question is where do i wire in the leads from the o2 sensor into the ecu?
__________________

92 SC300 Pearl White
Stock...for now
solprps92 is offline   Reply With Quote
Old 08-31-10, 10:38 AM   #21
solprps92
Rookie
Trader Score: (0)
 
solprps92's Avatar
 
Join Date: Jul 2010
Location: NC
Posts: 72
Default

yeah i got you thats just what im getting
or do you think the aem 3.5 would be better
__________________

92 SC300 Pearl White
Stock...for now
solprps92 is offline   Reply With Quote
Old 08-31-10, 10:50 AM   #22
Ali SC3
Na-T Guru
Trader Score: (10)
 
Ali SC3's Avatar
 
Join Date: Oct 2007
Location: CO
Posts: 6,975
Default

3.5 bar map sensor would throw off the gte ecu pretty badly, i wouldn't recommend anything over 2.5 bar and even then you should be running bigger injectors of an safc to compensate for that.

There is alot of info out there on different size injectors and map sensors being used with a TT ecu. I suggest you do some research but a 2.5 bar give you a slight increase in boost cut somewhere in the neighborhood of 18-20 psi (stock is around 16 if i remember right) and will only require you to add a little more fuel (you can use 550cc injectors instead of 440cc o use an safc to add fuel)

the general rule is the more you increase your map sensor, the more you lower the real load signal. now you must compensate fuel and timing. fuel is easy cause you can change injectors to match but now your timing is off by that amount of difference in load. This is not easily corrected even with a piggyback and you may notice driveability problems, bad idle, and possibly detonation at higher levels of boost if you don't correct for it. this is why its recommended to only do a slight change in map signal if you do it at all, so you will at least be relatively close to the right timing.

http://www.floridasupras.com/wiring-...cu-pinout.html
47B is Oxygen sensor (Sub) AFR signal
72B is Oxygen sensor (Sub) Heater ground

48B is Oxygen sensor (main) AFR signal
71B is Oxygen sensor (main) Heater ground

both of them also need a power wire, I don't recall the pin for that one.
__________________

1995 Lexus SC300 5spd Na-T ( TT Ecu Mod + a few others)

Last edited by Ali SC3; 08-31-10 at 11:01 AM..
Ali SC3 is offline   Reply With Quote
Old 08-31-10, 10:55 AM   #23
solprps92
Rookie
Trader Score: (0)
 
solprps92's Avatar
 
Join Date: Jul 2010
Location: NC
Posts: 72
Default

Quote:
Originally Posted by Ali SC3 View Post
http://www.floridasupras.com/wiring-...cu-pinout.html
47B is Oxygen sensor (Sub) AFR signal
72B is Oxygen sensor (Sub) Heater ground

48B is Oxygen sensor (main) AFR signal
71B is Oxygen sensor (main) Heater ground

both of them also need a power wire, I don't recall the pin for that one.
awesome thanks
__________________

92 SC300 Pearl White
Stock...for now
solprps92 is offline   Reply With Quote
Old 08-31-10, 11:03 AM   #24
Ali SC3
Na-T Guru
Trader Score: (10)
 
Ali SC3's Avatar
 
Join Date: Oct 2007
Location: CO
Posts: 6,975
Default

no prob, you guys are making me want to test my JDM ecu out now.. lol.
and I just got my car running right finally.
__________________

1995 Lexus SC300 5spd Na-T ( TT Ecu Mod + a few others)
Ali SC3 is offline   Reply With Quote
Old 08-31-10, 11:30 AM   #25
turbodremz
Lexus Champion
Trader Score: (18)
 
turbodremz's Avatar
 
Join Date: Jan 2008
Location: TX
Posts: 4,798
Chris Carrasco A-wHyTe-RaBbYt
Send a message via Yahoo to turbodremz
Default

Quote:
Originally Posted by solprps92 View Post
well see im getting all the parts this week
should start messing with wires next week
let me know how yours goes man
o hey i know that the sc o2 sensor is a 1 wire design
im getting an aristo ecu which guess uses a 3 wire
now im looking at the gte pinout and im seeing i think 2 spots that say Ox pins 47 (Ox2 signal sub heated oxygen sensor) & 48 (Ox1 signal main heated oxygen sensor)
on both the ge & gte pinouts pins 79 & 80 say "EO2/1 power ground" do these have anything to do with it?
i guess my question is where do i wire in the leads from the o2 sensor into the ecu?
Quote:
Originally Posted by solprps92 View Post
yeah i got you thats just what im getting
or do you think the aem 3.5 would be better
Try and find a FIELDS patch harness so you dont hack up the stock harness to bad, it will also aid if you plan to join a ME2 or SAFC later on too

And I will be ordering my o2 sensors this weekend.

Quote:
Originally Posted by Ali SC3 View Post
no prob, you guys are making me want to test my JDM ecu out now.. lol.
and I just got my car running right finally.

Do it!!..also speaking of the MAP sensors, do you think a GM 3bar will throw everything off too badly? or should I go ahead and get an SAFC right away?
__________________

LS1 5.7, T-56 6-speed trans, BruteSpeed/EPP Blower Cam, Fast 102 LSXR intake manifold, 28lb/hr injectors flowing 31.5lbs, DGR Fabrication motor mounts, PSI Conversion LSx harness, F-body driveshaft, Tuned By Frost PCM with TSP cam tune, Mishimoto Supra Radiator/Shroud/Fans, QuickCar fused switch panel, Full custom Speedhut dash cluster/gauge setup, Hooker headers to 3.5" dual exhaust with X-pipe, Dynomax 3.5"x6" bullets, gutted and caged.BUILD THREAD and VIDEOS
turbodremz is offline   Reply With Quote
Old 08-31-10, 12:17 PM   #26
99SC42
gte & na-t
Trader Score: (44)
 
99SC42's Avatar
 
Join Date: Jan 2007
Location: In front of you
Posts: 5,016
Default

"Chris " is "AliSC" is my Twin lol he won't do it , not that it's a bad thing but when you are EMS you wouldn't wanna go with stock ECU and Specially the car has been running Great so far.....
I would have done this setup if i didn't have AEM.
99SC42 is offline   Reply With Quote
Old 08-31-10, 12:28 PM   #27
Ali SC3
Na-T Guru
Trader Score: (10)
 
Ali SC3's Avatar
 
Join Date: Oct 2007
Location: CO
Posts: 6,975
Default

I think the whole beauty of this setup is the ability to use stock everything.
there are many different combos people run, some are good for street, some are only good for drag that you would never think of driving on the street, and some are dyno queens with unrealistically large injectors and map sensors that work on WOT, but good luck trying to parallel park that beast.

I actually tried a gm 3 bar map sensor and I couldn't get the car to run at all.
Plus it would put you in more aggressive timing in boost and your idle may suffer, and if you think about it its unecessary to take this trade off.
If you can live under 16 psi (or 20+ with a piggyback), use the stock TT map sensor and your car will run the best.

I recommend using the TT map sensor for this mod, I tried a few other ones without a whole lot of success.
Apparently, the stock ecu likes the stock map sensor.
__________________

1995 Lexus SC300 5spd Na-T ( TT Ecu Mod + a few others)

Last edited by Ali SC3; 06-28-12 at 07:04 PM..
Ali SC3 is offline   Reply With Quote
Old 08-31-10, 12:51 PM   #28
turbodremz
Lexus Champion
Trader Score: (18)
 
turbodremz's Avatar
 
Join Date: Jan 2008
Location: TX
Posts: 4,798
Chris Carrasco A-wHyTe-RaBbYt
Send a message via Yahoo to turbodremz
Default

Gotcha, guess its time to find the 2.3bar MS..Only thing I am concerned with now is the GTE ecu controlling the stock GE auto trans, but if not I have a backup plan. im working on my FIELDS harness now, and this weekend will be finishing up my new FFIM and Q45 TB, so hopefully I will have some pics and possibly video of it up an running..soon.
__________________

LS1 5.7, T-56 6-speed trans, BruteSpeed/EPP Blower Cam, Fast 102 LSXR intake manifold, 28lb/hr injectors flowing 31.5lbs, DGR Fabrication motor mounts, PSI Conversion LSx harness, F-body driveshaft, Tuned By Frost PCM with TSP cam tune, Mishimoto Supra Radiator/Shroud/Fans, QuickCar fused switch panel, Full custom Speedhut dash cluster/gauge setup, Hooker headers to 3.5" dual exhaust with X-pipe, Dynomax 3.5"x6" bullets, gutted and caged.BUILD THREAD and VIDEOS
turbodremz is offline   Reply With Quote
Old 08-31-10, 02:23 PM   #29
Ali SC3
Na-T Guru
Trader Score: (10)
 
Ali SC3's Avatar
 
Join Date: Oct 2007
Location: CO
Posts: 6,975
Default

good luck with the trans, hopefully it will work out.

i found some helpfull info for you in this thread: http://www.clublexus.com/forums/gs-f...-1g-gs300.html

"The reason swapping a TT auto is complicated is because of the line pressure issue with the valve bodies. Believe it or not, the cable the n/a auto has is NOT a kickdown cable but a cable to control line pressure. The problem with the TT tranny is line pressure is controlled electronically via a solenoid. The solenoid is linearly controlled and allows for more precise line pressure control. So far, the only way to control the TT tranny is with an AEM, however"

Since you are doing the opposite, if you could retain the cable to control the line pressure (doesn't it come off the throttle body to the trans? its already there so don't remove it), then the transmission could theoretically operate just like before and just leave the electronic control from the TT ecu doing nothing (theres no where to connect it to anyways). I would imagine you may get a code or 2 for this, but maybe there is a way to trick it into thinking its connected.
__________________

1995 Lexus SC300 5spd Na-T ( TT Ecu Mod + a few others)
Ali SC3 is offline   Reply With Quote
Old 08-31-10, 02:28 PM   #30
solprps92
Rookie
Trader Score: (0)
 
solprps92's Avatar
 
Join Date: Jul 2010
Location: NC
Posts: 72
Default

yeah i guess im kinda lucky there i got a 5-speed
__________________

92 SC300 Pearl White
Stock...for now
solprps92 is offline   Reply With Quote
Old 08-31-10, 02:28 PM
 
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Distributor Delete Pics w/ 7m-gte CPS / vvti Coilpacks Ali SC3 Performance & Maintenance 256 10-15-14 08:30 AM
Need Help picking out an ECU Aswilley Performance & Maintenance 6 06-09-14 02:01 PM
1JZ No Start - Experts Suggestions Required! ChrisPacki Maintenance 10 01-23-14 09:20 AM
Aristo 2jzgte harness puzzle figured out! wanganstyl Performance & Maintenance 171 05-19-13 08:52 AM
TT usdm ecu in na-t wont start.. Need Help!! 2jzforlife Performance & Maintenance 2 10-24-12 07:02 AM


Tags
2jzgte, aem, aristo, ecu, iat, igniter, jdm, lexus, mod, odb1, single, stand, stock, supra, tt, turbo

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -7. The time now is 03:22 PM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info