Originally Posted by 4rcedfed

So im basically going to be doing a build similar to yours, jdm built auto for now. Reading on the first page you used a TT block with the ge vvti head, machine work and a stand alone. The only difference is i want to swap in a complete GTE vvti motor and built auto trans. Would it be safe to say that most of the stock 99 sc 300 wiring will plug into the gte vvti motor (minus the twin turbo vsv, tach, auto trans, and fuel injectors) and work if used a stand alone, with supporting mods, fuel injector resistors, and a single turbo? Will the stand alone control the jdm auto? Or is it best to just get a complete tweakd wiring harness? Sounds like only a few things would need to be rewired, and a aristo maf if i wanted to stay twins for now? Thanks! Great inspiration. Waiting for more updates on your project.

Originally Posted by 93twintrbo

Although I cant say for certain. The GE and GTE vvti engines share Most of the same sensors and locations of sensors etc. Three that come to mind that are the TPS1 and TPS2 sensors as well as the DBW motor. The Stock GE vvti harness would have to be extended to reach the locations of the GTE engine. Using the existing harness, would be the easiest way to retain the functionality of the car I believe. You can Piggy back the stand alone off the existing 2jzge vvti ecu. If you swap over the valve bodies from the N/A trans to the Aristo trans, everything in the transmission will function normally as it did when you had the stock one in there. If you decide to keep the twins and want to retain the sequential system, You will need to use the stock aristo GTE ecu.

Lawrence

Originally Posted by 4rcedfed

Thank you Lawrence for the help! Few more questions if you dont mind? I was going to PM you, but I figure maybe other people that have similar plans might want to get as much info as possible. If you want me to PM you so I dont mess up your thread, let me know.

Same goals as you, Auto trans, daily driver if need to be, a/c, heat, everything. Under 500 whp daily and up to 700 max if the trans can hold. But I want to be able to beat on this one. Pedal to the floor from dead stops, highway pulls, occasion drag racing. My Supra I didnt "beat" but the drivetrain could handle almost anything thrown at it. My 99 gs300 gte vvti, was not beat on, but had to put a few nissan/infinits, 335's, M3 and M5's in thier place!

When you say " piggy back the stand alone off the existing 2jzge vvti ecu" do you mean get a patch harness, run the 2jzge vvti ecu simtaneously with the AEM V2, but only wire in the engine sensors, fuel, map sensor, and timing to the AEM and let the oem 2jzge vvti ecu handle the A/C, Heater, transmission, etc? I wonder if cel's would pop up. Probably wouldnt matter.

The only thing I can think of to change if using the 2jzge vvti wiring harness on the 2jzgte vvti motor is: delete MAF wiring, extend wiring(starter, alt, fuse box, injectors, tps, a/c, etc), maybe resistors for fuel injectors, coil pack wiring if needed, tachometer, and everything else the AEM can handle? So theoretically the gte vvti motor should start up if all the sensors plug in and using the AEM.

I dont know sounds easy on paper, why would people buy a $1700 tweakd wiring harness (they are nice harnesses) if they can run it this way and get a stand alone and still retain all the creature comforts? There has to be something missing in this lol. I guess I will find out by doing it this way first.

Your built Aristo trans, you didnt post who or how. Do you do it yourself or send it out to boost logic, etc? Who do you recommend?

If you do it yourself, can you do mine and how much? Looks like the trans is holding up very well for you, any tips or advice, do's and don'ts? example, roll into power, let off before shifts, or like how you had to 50% throttle it so it wouldnt down shift to dyno etc?

Sorry for all the questions!!! I had a Supra so it was already turbocharged and the 6 spd is almost bulletproof. Also had a 99 gs300 gte vvti, those were easy, but never got into the built auto. New to the SC world!

Thanks again.

Originally Posted by 4rcedfed

Thank you for the reply!! With the research I have done, most high hp builds using the auto that I read about have failed with less abuse(of course we dont know that, sometimes people omit things or dont really fully disclose thier driving style in thier threads). Thats the reason why I asked, since you are making good power, racing it, daily driving and the trans is holding up well compared to others. Iam looking forward to see how the trans hold up with more power later. I think this is one of a very few success stories i have seen regarding the aristo auto and high hp.

Any other mods to the trans that you can share with us? Like type of cooling setup, certain cooler you use, certain fluids you recommend? Are you happy with the 3200 stall or are you thinking of changing it? How about your current rear end configuration? Any plans to change that and why?(if you do)

So your stock ecu is still controlling the transmission, the factory shift points, and overall drivability is not really affected with the power you are running?? It doesnt over rev before a shift on a hard run?

And on the AEM how does it know when the car is shifting, so you can lower the boost/timing accordingly? Is it just teed into both factory ecu and AEM inputs? I apologize if these are dumb questions. I am just very curious because this is how I want my setup to be, and run like this(but using an gte vvti and modified built trans)

Thank you again Lawrence! I appreciate the help. And great thread! Love seeing how someone is exploring the limits of the aristo trans.