Hello everyone, although I'm not new to Supra Forums, I am new to posting, and just wanted to take the time to introduce myself and share my project.
I recently came across an '89 N/A Supra with a JDM 7M-GE and rebuilt tranny, only to find out the head gasket was blown (big surprise) and there was corrosion between the cooling channels and block (not to mention an ungodly amount of rust blocking the cooling channels). Apparently the previous owner never heard of coolant/antifreeze.
So instead of spending money on and repairing a piece of sh*t motor, I've decided to yank the current set-up in favor of a 2JZ VVT-i twin-turbo from a late model Aristo. A lot of you may ask why go with the VVT-i when I can get the fixed cam 2JZ and save the trouble, well number one I want to be unique. There's only one other MK3 with the same set-up I know of and its definitely not popular. The next is I've done a huge amount of research and this motor has more usable low-end torque than any other stock JZ engine. Most people state that the VVT-i is just another thing to go wrong and is more of a hassle to tune when reaching high HP numbers, but I think that given the right amount of time and tuning, this motor could reach another pinnacle in 2JZ culture.
Well, I'm rambling on now, the whole reason I've posted this thread is to 1) post a build thread with pics and info to keep anyone who's interested updated and 2) take any advice anyone might have on this project. I realize it's going to be an expensive project but its worth it, but I do have a few questions...
First, is there any major differences in the wiring between the 2JZ-GTE and VVT-i? And would it be better to source a 2JZ fuse block or use my existing one? It seems the VVT-i only came automatic and I'm hooking it up to an R154, from pics it looks like the ECU has 2JZ-GT stamped on it, so does that mean I don't have to worry about swapping ECU's if I'm swapping tranny's like you do on the 7M? And I'm guessing I'll have to extend the wiring harness being it's a JDM motor set, can anyone confirm this? It seems wiring is gonna be the biggest pain in this one.
Second, I realize the 2nd turbo intake fouls with the USDM MKIII firewall, but to what extent? I don't mind modifying the firewall as long as the modification is not extensive. If I do have to go single, is there any reputable dealer of rebuilt turbos? I'm trying to do a budget set-up right now, but I do not want to go cheap/low-quality. I really don't trust the turbo's being sold on eBay, though the OBX manifold looks like it would be OK to hold 12-15 psi (my goal).
Any other tips/advice would be helpful. Sorry if any of this has been stated, I searched and theres not much info for the VVT-i motor. I'm doing the entire swap pretty much alone and have only worked on the 7M, though I've done a ton of research on the 1JZ/2JZ. Pics will be put up shortly. Thank you all for your time.