BigWaveSC

iTrader: (5)

I have my engine importer looking for a good low mile 1j, but he wants to know what car do I want it from.

I told him to look for a soarer non vvti engine, with harness and ecu, right now I have a 5speed sc and plan on using the stock tranny, and tranny computer.

A friend in Japan told me everyone there is using the 1j out of the jzx110, and jzx100 due to its great performance and people seem to really love them, but I am thinking that could cause extra work and I am looking for easy street.

Should I stick with the soarer 1j and plan on using my stock tranny or change my plans.?

Also, is there a difference between the auto and manual 1j engines I should know about.?
Thanks
Dave

plex

iTrader: (11)

Get the soarer 1J. Nope no difference between the manual and auto 1j motors.

joe diego

iTrader: (3)

Sc300 ftw! Cheap car to buy, easy to find, and very easy to swap In a 1jz.

Lokz

iTrader: (1)

If you get a soarer 1JZ and harness, Jump into the harness extension first, once that is out of your way. Rest all of the swap is a weekend job. I just finished mine!

KahnBB6

iTrader: (5)

Question: if you swap in a 1JZ (either version) that has an automatic ECU, other than a neutral bypass, how well does the engine run if it's going into a 5-speed SC? A matching manual 1JZ ECU would be ideal of course but are there any glaring side effects to driveability or reliability?

Ali SC3

iTrader: (10)

I have an aristo ecu (automatic) on my 5 spd sc300, and the only time I can tell that its an auto ecu, is when you are cruising and you suddenly punch it, its like there is a split second where the power is down then it comes on like normal, almost like its waiting for the trans to shift, but its hardly noticeable to most people.
If you do a smooth transition with the pedal though it really doesn't seem to even do that.
Other than that one thing, it idles, drives and boosts as smooth as factory.

People say its because the ecu pulls timing during shifts, which I think is whats happening to mine, if you need that instantaneous rocketing on downshift from cruise go for a manual ecu, but if you are zipping through the gears, you probably wouldn't even notice it.
Even with less timing for a second if you downshift into your sweet spot of your turbo its going to go fast anyways.

KahnBB6

iTrader: (5)

Ali SC3, thank you for that! I have heard of this timing pull when reading people's experiences with a W58 or R154 swap against a 1UZ-FE 400 but wasn't sure if it was the same with a turbo car. I will probably feel the difference, to be honest but if it's as minor as you say I could probably live with it until a correct M/T ECU could be located.

While I'm collecting support parts for my swap I'm debating whether or not I really need to worry about finding a manual 1JZ VVTi engine and transmission or just look for a (probably far less abused) auto non-DBW version. The transmission will be an R154 no matter how I do it but obviously there might be a chance of getting an engine that was treated well if I go for an automatic and find a VVT-i M/T ECU separately.

I'm not set on that plan but I'm glad to know I'll have few issues if I choose to go that way and correct it later.

Ali SC3

iTrader: (10)

yeah its actually pretty minor I have the same plan of eventually getting a manual ecu, but its such a minor problem its something that can go to the end of the list until you get to it.
As a side effect though, It actually makes a big downshift into your powerband feel really smooth right into when the turbo takes off. gives it a bit of that Lexus feel.. lol.

KahnBB6

iTrader: (5)

^^ Interesting, that! Although I think you're getting a different experience with your 3.0L than I will with a 2.5L swap since the smaller displacement engine is supposedly such a rev machine. I wonder if the 1JZ VVT-i auto ECU is tuned for the same smooth transitions that the Aristo ECU was designed for. Probably minor, but still.