2jz-gte Conversion
#331
Driver School Candidate
Ya mine is a 03, I know about the wiring differences between the 98-01 and the 01-05 cars. And I know adding one wire is easy, but in my case; cutting the old open and looming it to the engine just worked better. Even though I got an engine from a 01+ Aristo, it shared the wiring from the older cars.
#332
In that case I don't blame you a bit! I've done the whole "make the original harness work no matter what" thing with a nissan.....NO FUN! I'm sure you probably did the best and easiest thing.....
If you don't mind me asking....I've heard that sometimes going to a stand alone or something similar on these cars that you lose a lot of control over other things in the car. Now I know that this car has about as many cpus as a typical office building but how if any effect did you have when you did your "upgrade"?
If you don't mind me asking....I've heard that sometimes going to a stand alone or something similar on these cars that you lose a lot of control over other things in the car. Now I know that this car has about as many cpus as a typical office building but how if any effect did you have when you did your "upgrade"?
#333
Driver School Candidate
Well, i dont think any company make a stand alone for the 01-05 GS and IS. Thats why i went with a AEM FIC; AEM does make a patch harness for these two cars so adapting it to the car was easy. The FIC works with the ecu, in this regard the car still operates much like stock. Given my setup, i would like a stand alone ecu, but for right now i am content with what i got. And this car does have a cpu to control every little thing, that is why the FIC works so well. It leaves the stock car functions in tact. i also tried the Greddy e-manage, but that piggy back system works against the ecu which leads to tuning problems down the road. The AEM FIC works with the factory ecu to deliver the greatest amount of tuner control.
#335
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Hey, 2003jzs160.
I have a 2002 that I'm doing the vvti aristo swap in and are still trying to find the best/easiest way. My goal is to engine in first then worry about the turbo.
From what I understand 1. keep the GE ECU, 2. Made a custom GE Harness, 3. Kept the 5-speed A650E tranny. Right?
Also, who made your custom GE harness? And if you did it yourself, was it complicated?
I have a 2002 that I'm doing the vvti aristo swap in and are still trying to find the best/easiest way. My goal is to engine in first then worry about the turbo.
From what I understand 1. keep the GE ECU, 2. Made a custom GE Harness, 3. Kept the 5-speed A650E tranny. Right?
Also, who made your custom GE harness? And if you did it yourself, was it complicated?
#336
Interesting...I left the GTE harness on the engine during the install and added a single wire that took maybe 5 min. I couldn't imagine the wiring being any easier. It was actually much easier than I expected.
I would however agree with most of the turbo comments. It is much easier to remove them when the engine is out of the car so if you have the money on plan on doing it soon.....you might as well do it now. On the other hand....the factory turbos are capable of quite a bit of HP and a lot of fast spooling fun. If you can't afford the single turbo changeover just use the twins....they come with the swap and make for a much better time than the stock GS engine. I like having full boost at 2500 rpm....
Just my .02
I would however agree with most of the turbo comments. It is much easier to remove them when the engine is out of the car so if you have the money on plan on doing it soon.....you might as well do it now. On the other hand....the factory turbos are capable of quite a bit of HP and a lot of fast spooling fun. If you can't afford the single turbo changeover just use the twins....they come with the swap and make for a much better time than the stock GS engine. I like having full boost at 2500 rpm....
Just my .02
Horsepower isn't everything, my car was making 700RWHP, and now I'm maybe pushing 400RWHP. I enjoy the GS more now than I did then. It's a blast to come off the line quick, and the gas mileage jumped from 11 to 15 in the city, and I drive hard.
#337
Driver School Candidate
Hey, 2003jzs160.
I have a 2002 that I'm doing the vvti aristo swap in and are still trying to find the best/easiest way. My goal is to engine in first then worry about the turbo.
From what I understand 1. keep the GE ECU, 2. Made a custom GE Harness, 3. Kept the 5-speed A650E tranny. Right?
Also, who made your custom GE harness? And if you did it yourself, was it complicated?
I have a 2002 that I'm doing the vvti aristo swap in and are still trying to find the best/easiest way. My goal is to engine in first then worry about the turbo.
From what I understand 1. keep the GE ECU, 2. Made a custom GE Harness, 3. Kept the 5-speed A650E tranny. Right?
Also, who made your custom GE harness? And if you did it yourself, was it complicated?
But to answer your question,
1) Cut open the GE harness, the only wire that need to be cut and extended is the temp sensor wires.
2) If you want to use the stock twins; remove the factory boost controlling solenoids and replace with vacuum hoses and run a boost controller. Keep in mind the factory turbos can be good however the sequential mode lets them down.
3) I went with a single turbo up front because it would be easier.
4) The stock injectors are 440cc, good for factory turbos and low boost single applications. The best thing, upgrade the entire fuel system. larger injectors, rail and regulator.
The more you build yourself the easier it is to understand and swap process is.
5)Get your A650E rebuilt to new and add a cooler, thats all you really need to hold up to 400 hp. After that, there are companies which build these transmissions.
6)Get a AEM patch harness for the car (01-05 GS,IS)
7) After that its your choice, AEM FIC controller, Greddy E-Manege and others
The FIC by AEM seems to work the best with the factory ecu.
A note: I did this in my home two car garage, and I'm 18. If I can do it, you can do it.
#338
Driver School Candidate
I agree with you there, I just swaped in a Aristo motor / 4 speed on stock twins , downpipe, and exhaust. It is fun on the street, still pulls hard too. I was very impressed with the stock twin setup on BPU. As for the tranny, I would never keep the original 5 speed. Install the proper 4 speed and call it a day, it will hold more power, the shifts are much faster and crisper. I ran the stock 5 speed tranny with upgraded valve body and it wasn't as nice as the stock 4 speed that cam with the Aristo swap.
Horsepower isn't everything, my car was making 700RWHP, and now I'm maybe pushing 400RWHP. I enjoy the GS more now than I did then. It's a blast to come off the line quick, and the gas mileage jumped from 11 to 15 in the city, and I drive hard.
Horsepower isn't everything, my car was making 700RWHP, and now I'm maybe pushing 400RWHP. I enjoy the GS more now than I did then. It's a blast to come off the line quick, and the gas mileage jumped from 11 to 15 in the city, and I drive hard.
#341
This is great guys....it looks like we have 2 solid ways of doing things depending on your base car year....at least we know that no one will be forgotten!
I'm still running stock (GTE) but thats mainly because its been at the body shop for a MONTH!!!! I'm embarassed to say all they are doing is a repaint on a mirror and installing a spoiler. I obviously took it to the wrong place. Oh well.....
Looks like she won't see much street time till next year.
Here's a question for you guys....I haven't made any decisions on where I'm going to mount my gauges....doesn't seem like there are many good places and I can find anything prefab....whats your guys opinion?
I'm still running stock (GTE) but thats mainly because its been at the body shop for a MONTH!!!! I'm embarassed to say all they are doing is a repaint on a mirror and installing a spoiler. I obviously took it to the wrong place. Oh well.....
Looks like she won't see much street time till next year.
Here's a question for you guys....I haven't made any decisions on where I'm going to mount my gauges....doesn't seem like there are many good places and I can find anything prefab....whats your guys opinion?
#343
Well see the body shop is a business owned by who I work for.....I kinda thought I could trust them to get it done quick....I trust the cars safety there but I really had no idea it would take them this long. I should have known....employees always get put on the back burner,,,,,grrr