2JZ-GTE Supra & Aristo Differences Rundown

[Viper]

Hello all,

Being relatively new to the scene, compared to a lot of you out there, I started gathering information a while ago, on the two main sources for 2JZ-GTE's for conversation, and thought i'd share it all.

Below are a few notes about each engine, and the main difference between them. Undoubtedly, some information may be wrong, or out, and hence why this is a discussion board.

I've also found pinouts for both Aristo and Supra looms, which hopefully can be used for the conversions. Again, I'm not sure if they are right or wrong, so please, discuss

Similarities (JDM Only, US Spec are different, but not usually imported )

Same

• Turbo (CT20A's)
• Block
• Internals
• Injectors (430cc's)
• Gearboxs (Box's from each model will bolt to the other, but obviously some are better then others, V160 comes to mind )
• TB

Main difference between the Aristo and Supra;

• Sump (Supra : Mid/Rear, Aristo : Front)
• Front and rear water pump housing

(Aristo used a hydraulic fan and pump, where the Supra is a viscous clutch (Thanks Norbie))

• Plenum
  • Only a minor difference, ontop of the plenum, the Aristo's don't have a vacumn line connection from the booster. (E-boost)
  • Some models seem to have the connetion, but its 'different'.

(Side Note; Wonder what difference it makes for the Supra...???)

• BOV/Wastegate
  • Actuator located engine side of Turbo's (Supra is reversed)
  • Vent mounted slightly different.

Few things I’m not sure about;

• Exhaust Manifolds (Would assume so)
• Sump Oil Pickups (No idea , but seem to be)
• Turbo Oil Lines (Maybe confirmed?)

Now, onto the ECU/Loom Pinouts

Firstly, the Aristo.
These are insanely hard to find, i managed to grab informations of various sites and some files form an FTP, and haven’t had a chance to check over them, but would seem to be good.
Also found a diagram from someone who started to work it out from scratch.
Quick look over both and they seem to coincide.

See attachments.
Let me know if they are wrong, so they can be changed.


And, for the Supra, these can be grabbed from the mkiv tsrm, here


Hope this comes in handy for someone.

Thanks
Ben

Thanks to all how have or are helping with the collation of data.

UPDATE:
Added the Supra Wiring harness files. Fairly large and contains a whole heap of stuff.
Ive put the files up on rapidshare and added all the older stuff as some have had issues.

Aristo ECU
http://rapidshare.com/files/51595481...ECUextract.pdf

Arista Pinout
http://rapidshare.com/files/51602484..._TT_Pinout.jpg

Supra ECU Pinout
http://rapidshare.com/files/51596373...SDM___JDM_.xls

Supra Body Wiring - All Plugs (8mb)
http://rapidshare.com/files/51600547/Supra_Wiring.zip

[Norbie]

Supra has a viscous clutch fan, not electric.

From what I've seen the Aristo and Supra plenum and TB are the same, with the minor exception that the Supra has a fitting on the rear of the plenum for the brake booster while the Aristo does not. This is because the Aristo uses some weird electric brake booster instead of the conventional vacuum setup found on the Supra.

[BigWorm]

From what I've seen the Aristo and Supra plenum and TB are the same, with the minor exception that the Supra has a fitting on the rear of the plenum for the brake booster while the Aristo does not. This is because the Aristo uses some weird electric brake booster instead of the conventional vacuum setup found on the Supra.

Mmmm, a problem my brother ran into when installing his 2J into a cressida, however I did notice that MR1JZs Aristo does have the fitting on the plenum, only it's blanked off. So it seems some do & some don't.

[Viper]

Supra has a viscous clutch fan, not electric.

Haha, first mistake
Cheers Norbs

From what I've seen the Aristo and Supra plenum and TB are the same, with the minor exception that the Supra has a fitting on the rear of the plenum for the brake booster while the Aristo does not. This is because the Aristo uses some weird electric brake booster instead of the conventional vacuum setup found on the Supra.

Mmmm, a problem my brother ran into when installing his 2J into a cressida, however I did notice that MR1JZs Aristo does have the fitting on the plenum, only it's blanked off. So it seems some do & some don't.

Noted, thanks guys!

[Mr Ed]

Aristo has the ignition module on the drivers side of the engine bay, Supra is on the passengers. (EDIT: Oops had this the wrong way round before )

Aristo has the wastegate actuator on the engine side of the turbos, Supra is on the outer side.

Aristo has the stock BOV coming off the turbo outlet Y pipe closer to the 2nd turbo than a Supra.

........more to come

[Mr Ed]

Actually the fitting for the brake booster comes off the TOP of the plennum, not the rear.

[Mr Ed]

Mmmm, a problem my brother ran into when installing his 2J into a cressida, however I did notice that MR1JZs Aristo does have the fitting on the plenum, only it's blanked off. So it seems some do & some don't.

And its not blanked off, it is actually a different cast to the Supra. My JZA80 motor still has that plug in the back, but the top of the plennum has a different shaped little ridge thing.

Will take photos to explain when I get a camera. (I have an Aristo 2JZ, and a JZA80 2JZ )

[Mr Ed]

[*]Exhaust Manifolds (Would assume so)
[*]Oil Pickups (No idea , but seem to be)[/LIST]Now, onto the ECU/Loom Pinouts

Zoom had an article where they fitted Aristo turbos to a Supra engine, all was the same except for the oil drains from memory.

Ive got a sneaking suspicion that the engine brackets are different too.

[Viper]

Cheers, all updated

[Mos]

To complicate matters there are different versions of Aristo 2JZs as well.

Mine came out of the last run of the JZS147 Aristos (twin airbag).

Late model Aristo plenum does have a booster port on top - it's plugged, not blanked. (7M-GE banjo fits the port but the locating pin doesn't coincide).
Late model Aristo oil filter mounts at an angle to the block, as opposed to most Aristos that have the filter perpendicular to the block.
Late model Aristo sump is a different pressing to the earlier Aristo sump.
Late model Aristo has the small logo "2JZ-GTE" on the top of the timing cover - earlier model does not.
Late model Aristo does not have a kickdown switch under the accelerator pedal - earlier does.
Subtle wiring differences between late and earlier versions - mainly wire colours (and more than two variations), but slight functional variations also.

Aristo ignitor is on the driver's side, not passenger (strut tower).

Aristo to Supra (engine ECU) wiring differences are not huge - the pinout is mostly interchangeable (I haven't looked at your pinouts yet, but will do so and comment time permitting). BTW, I have mapped out the Aristo looms from at least three (subtly different) front cuts.

Supra turbos fit the late model Aristo (can't comment on earlier model Aristo but can't see why they wouldn't). The housings have slightly different castings but all the machining is in the same locations, as are the oil and water lines (oil supply and returns comes off the same flange on the turbo, water lines have two positions, one of which normally has a blanking plate).

Mos.

[Mr Ed]

Aristo ignitor is on the driver's side, not passenger (strut tower).

This is correct, I got a bit muddled up before. (Opposite side to Supra still though )

[TheToyman75]

So anyone got a wiring Diagram for a Manual 2JZ-GT M/T Aristo ???
ECU is date stamped 20/12/93 if that narrows down the diagram I am chasing.

[Viper]

They never came in manual from factory as far as i know of.
So I don't think it exists

[Norbie]

What he said; if you found an Aristo with an M/T ECU in it I'd guess it was a conversion. Yes there are a few of those floating around, I saw one at the ImportBitz workshop not long ago.

[cambelt]

And any M/T ecu ,s that are found in a aristo will be supra ecu,s , with the few pin changes .
Dave