aristo 2jz

[tissimo]

what is needed to be changed from a 2jz aristo engine to fit in a supra (mkiii)? Oil pan and pickup? anything else. I picked up a second supra and was sort of thinking of doing a 2jz using 1jz electronics. I'm not going to go crazy w/ it just stock twins (probably just keep the jdm ones unless i get a good deal on usdm). If i go single i'd probably put the 2jz into my car w/ the aem and stuff and run the 1jz basically stock (going to be a dd)

 

[drunk_medic]

Lower oil pan, oil pan baffle, upper oil pan, pickup, 1JZ engine mounting brackets if going in an 89+, BIC 1JZ engine mounting brackets if going in <89. If using a manual transmission, you would need a 1JZ bellhousing and flywheel from a 5-speed manual 1JZ with the R154 gearbox [1JZ manual or turbo Supra 5-speed manual]. You can also use the W58 gearbox [non-turbo Supra 5-speed] with a MkIV W58 bellhousing, clutch and flywheel, though this will not hold quite as much power as the R154. You can use the V160 6-speed gearbox from the TwinTurbo MkIV Supras, but you are going to need a manual transmission ECU, the gearbox and a custom driveshaft at least.
If going the automatic route, which may be easiest, the A340E 4-speed automatic from the Aristo/Supra may do you well. If your Supra that wants the transplant is using an auto tranny, this may be your best bet. There is a write-up on Arnout's page on how to combine the output shaft of the MkIII's A340 with the stronger A340E for the 2JZ. This will allow you to bolt the MkIII auto driveshaft right up to an upgraded A340E, and it will bolt right up to the 2JZ.

http://www.supras.nl/index.php?option=com_content&task=view&id=35&Itemid=52

1JZ electronics would not work. The 2JZ has many more sensors. You can do a 1JZ swap and put a 2JZ block under it for more displacement - this is the 1.5JZ and would be a 2JZ block with 1JZ head, turbos and electronics.

 

[Ken]

what other sensors does the 2JZ have that the 1JZ doesn't that would prevent it from running properly???

 

[drunk_medic]

Look at an ECU pinout, man. There are between 50 and 60 used pins on a 1JZ ECU connector. A 2JZ connector has 80-95 used pins. I'm sure there are things you could delete on either, but I don't see 1JZ electronics running a whole 2JZ.

Most people just grab the 440cc injectors and MAP sensor from a JSpec 2JZ and then tune their 1JZ with a S-AFC.

I often wondered why people use their time and money to do things like stick the CT-12b turbochargers from the 2JZ on the 1JZ. Is it a "just to do it"?

 

[tissimo]

It should/ will run it. I dont see anything that the 2jz has that the 1jz cant control (outside stock twins). Depending on how much I can get a 2jz harness for I may go that route. Just some ideas I'm throwing around in my head. I probably never will get to it as I will probably invest the money elsewhere instead of cars.. but an idea.

one thing is i may swap rolls of the 2jz and 1jz.. use teh 1jz for the dd and the 2jz to go fast.. so would have to be compatable w/ both.

edit: im pretty sure SupraNick or wahtever his name is now is using the 1jzecu and harness on his 2jz.

 

[Ken]

Exactly. I don't see any reason why you wouldn't be able to use a 1JZ harness and ECU on a 2JZ engine. All of the major sensors are the same: cam/crank position, knock sensors, etc, etc. Anyways, an engine is essentially a very complex chunk of metal. In this case, there are provisions on the 2JZ for all of the 1JZ sensors even if they aren't exactly the same (use of different connectors for example).

I will be using US spec CT12Bs with my 1.5JZ along with 2JZ cams and emanage. Looking to get about 450 whp. I guess in a way it is kind of a just to do it mod, but it has its benefits, especially when fabrication costs significantly less than doing a single kit.

 

[csnow]

Justin,

Why dont you just put the 1J head on the 2J block?

 

[tissimo]

Justin,

Why dont you just put the 1J head on the 2J block?

cause i want another swap i may eventually put a 2j bottom on the 1j..

 

[csnow]

Give me a call tomorrow if you have the car at work.