[stillspoolin87]

I have a n 87 mk3 7mgte, 5speed the r154 i assume. I recently blew the engine and am lookin at swapping a 1jz twin turbo into it. Im looking at buying a complete driveline off ebay from one of those dealers that have complete engine,trans,wiring, and ecu setups There are some things I am unsure of before i buy a motor.

My questions are as follows..

-I know that the jz's bolt easier in the '89 and up mk3's but will it bolt into mine as long as i buy the correct mounts?

-They sell the motors with front sump rear sump, and i think even center, which do i need?

-Is there any differences in the 5 speed transmission thats bolted to the jz compared to the R154 thats in my car? Will my driveshaft work?

-I have heard the wiring is not long enough and that it needs to be extended but will everything still plug in?

Any help or suggestions would be greatly appreciated

 

[87supramario]

First of all my friend. The JZA70 motor comes out of a JZA70 car. Your car is a MA70. If you want to run this motor your also going to need to find a JZA70 fuse box. And your MA70 dash bord harness wont plug into the JZA70 ECU either. Making a JZA70 engine and computer work in the MA70 chassy consists of ALOT of wirering. But my suggestion is to find a non turbo 2JZGE with low miles and turbo that by using the parts that you already have. All you need is a 1jz belhousing for this to work with your R154 that is in your car. This wont work with a 2jzge VVT-i though. Another thing you need to do is still get the 89+ crossmember for the engine mounts like you already stated.

With your 7MGTE ECU and your stock 7MGTE wire harness you can plug in 90% of your harness into the 2JZGE. The other %10 you just need to extend wires because they wont reach or you gotta wire them to the 2jz sensors or something. (Im not positive of exacly what you really need to do for that %10 but its easy.) Your 7MGTE coil packs will work with the 2JZGE and delete the distriburator. Your 440cc injectors will fit the 2JZ. 7MGTE air flow meter goes on the 2JZGE. Your exaust header cant bolt upto the 2JZGE but you can buy aftermarket T4 turbo headers for the 2JZGE. Your 7MGTE turbo's can be switched over to the 2JZGE and custom fittings to make your already existing intercooler system work also. But you need to make oil coolers and upgrade the head gasket to a much thicker metal head gasket to fight the higher compression to help reduce the risk of another blown head gasket.

2JZGE is similar to the 7MGTE. As for both engines being 3L and other simular characteristics. The 7MGTE ECU would think that its controlling a 7MGTE but its actually a 2JZ. 7M computers controling a 2JZ block.

There is only few threads out there that you can find by searching of this if you want to. There is not much else to it from what I have explained but fallow the other threads for full details.

 

[stillspoolin87]

With these motor mounts will i still need to change the crossmember though?

http://store.driftmotion.com/static/i-1jz2jzenginebracketsearlymk3.php

 

[Driver005S]

No

 

[stillspoolin87]

ok so if i buy the setup off ebay and these mounts, will my driveshaft work and do i need a front sump or rear sump engine?

 

[Wreckless]

ok so if i buy the setup off ebay and these mounts, will my driveshaft work and do i need a front sump or rear sump engine?

First off, thanks for actually having intelligent questions and demonstrating some idea of WTF you're doing. A lot of the newbs here just don't get it and want to be spoon-fed everything.



For a JZ or any engine, you'll need rear sump. General rule of thumb is that MK3's, MK4's, SC's, & S2000's need the rear sump, while MK2's, GS300's, Cressidas, and S13/S14's all need a front sump.

Those Driftmotion brackets will make a rear sump JZ engine drop in to your existing 86-89 crossmember with your square motor mounts.
The only center-sump JZ's I'm aware of were from the Toyota Crown in various flavors from 1991 until 2003, but were mostly 2JZ-GE's and 1JZ-GE's, although the 99-03 body style 'Crown Athlete V' had the VVTi 1JZ-GTE. So chances are you won't see a center sump.

Your driveshaft will work so long as you get a 1JZ-GTE with an R154, and use the 1JZ-GTE/R154 bellhousing & clutch assembly. Most 1JZ-GTE's you see these days will be coming from a JZX90 Chaser or Mark II (not to be confused with a MK2 Supra) which will be front sump, and come with the Soarer/Chaser R154 which has a shifter tripod and moves the shifter back another ~4in from where it is placed on a stock MK3 R154. If you end up with that gearbox, sell it to a MK4/SC300 guy for some $$$ (They need the extended tripod style shifter) and use its bellhousing & clutch & driveshaft with your existing R154 - everything bolts up.

While 87Supramario's suggestion of doing an NA-T 2JZ-GE isn't a bad idea, I fully appreciate and understand the desire to have a factory turbo engine.

For the wiring, if you do not care to go through all of that hassle yourself, you can contact Dr Tweak of Phoenix Tuning who specializes in custom PnP wiring harnesses for Toyota engine swaps - I've heard nothing but good things about his harnesses, but expect to send in your 1JZ-GTE and 7M-GTE harnesses and pay around $600-700. But if you want something that works right the first time and every time with no headaches, that is almost a bargain.


That all being said, make every effort to buy an actual JZA70 engine pull. It will make your life a LOT easier. It's easier to use a JZA70 automatic engine set and find the 1JZ-GTE bellhousing & clutch for your R154 than it is to use a Soarer or Chaser 1JZ-GTE and adapt it all to your MA70. In the Chaser's case, you'll need the rear sump oil pan parts too which will add up to over $500 from the dealer. The 1JZ-GTE bellhousing is around $350 and a 1JZ-GTE R154 flywheel is between $200 and 300 (or into the thousands if you opt for a multi-plate clutch instead of hunting down OEM stuff)

So if you can find a JZA70 5-spd engine set, it's easily worth another $1000 more vs any other 1JZ-GTE engine set for what you're trying to do.

 

[destrux]

The wiring isn't bad to do yourself, if you're good with figuring things out. I didn't have to change my fuse box, but I used a JZZ30 Soarer 1JZGTE, so I had to custom wire all the engine to body wiring. Just be aware that just because people posted wiring that they said worked for them doesn't mean it's correct. I found a swap guide on another forum that had wiring that about a dozen people said worked, only to find out for myself that a couple of things were wired seriously wrong (the starter and alternator, of all things).

 

[mk3_4me]

I'm confused. You do, or don't have to have a JZA70 fuse box? I just sent my harnesses in to sean @ myjzswap today. Told him which 1jz it was, & what it's going in to. Isn't the point of having the body connectors changed, so that you can just plug & play with the MA70?

 

[stillspoolin87]

Thank you for taking a newbs questions seriously, I did try and search and found some things but its just like information overload sometimes.

Anyways can i use the bellhousing that comes with the motor i buy or do i have to buy a special one? because i plan on using the R154 thats in my car.

 

[mk3_4me]

If the bellhousing is attached to a R154, you can use it. I got fucked by TigerJapanese, & received a W58, which is different. But the bellhousings aren't too expensive. Right around mid 300's on average.

 

[stillspoolin87]

And then the clutch kits are univeral for 7m n jzs so all I need is an 8 bolt jz flywheel?