Standalone ECU AEM EMS driving UZ's

[turboandrew]

Anyone controlled the COP coils? Or even on the pre-98 motors, what kind of signal was sent to the ignitors? Is it an "old school" signal 12v, then open circuit to trigger, or is it a logic high signal, like 0v, then 5v to trigger, or something else?

 

[cribbj]

Hehehe, Andrew, I posed the same question in the COP thread just now.

http://www.lextreme.com/forums/showthread.php?t=2754

From what I've seen in the Toyota Tech Files it's a 5v to 0v trigger, but it would really be good to get a 'scope on a working motor to confirm that.

John

 

[svpmx83]

Any progress on this, as I'm really keen to give it a go after Xmas

 

[svpmx83]

Cribbj

could you possibly email me the 1uz maps you have?

 

[jtjerry]

isn't sc400 ecu pins same phicically as from mk4 supra? my 1994 sc400 ecu connectors (one 80 pins with 10 mm screw in middle and second 40 pins connector) seems same as supra mk4 connectors. so aem-ems from supra mk4 should connect (phisically) to sc400 loom. Some pins will be different but can swap them, no problem. biggest problem for me is that strange ignitions system in my 1uz: almost as two separate 4 cylinder engines.

 

[lowboost]

it is setup complete like two separate engines in my opinion too, my main concern with this ems is the fact that the 2jz used coilpacks from the factory and the earlier 1uz's are still distributer style. I would imagine a VVTIL motor would have the coil packs we could use... wish we had more info on this...

 

[cowboy bebop]

I was talking with someone breifly about coil packs and the 1998+ 1uz-fe today. I had mentioned that the AEM didn't have enough ignition outputs, but he said that a possibility would be to fire two spark plugs at once, and run it like a 4 cylinder ( as far as ignition is concerned). I suppose this is what everyone was thinking?

Eric

 

[cribbj]

The AEM has enough ignition outputs (5) to fire the 1UZ in waste spark mode, just like it does with the 2JZ-GTE application. With the 1UZ motor it only needs 4 outputs to fire it in waste spark mode. With the 2JZ it only uses 3 of the 5.

Also, the early 1UZ, with its cam sensors and crank sensor "should" run a DIS COP ignition just fine without the distributors, with a bit of rewiring. For my application, I intend to pull the distributors, and simply blank them off.

The 2JZ-GTE motor has no distributors; the coilpacks are fired from an external ignitor, which is triggered directly from the ECU.

The SC400 harness is nearly identical to the 2JZ-GTE JZA80 Supra harness. Obviously it's got two more injectors and one more ignition output. Plugwise it's the same as the 2JZ harness so it's PnP.

Several of us intend to run this motor with the AEM and either an SC400 harness or a 2JZ harness, and a DIS COP ignition.

John

 

[jtjerry]

John,
do you think, it is possible run AEM ems wits stock early 1UZ FE ignition (stock mean two distributors, two coils and two ignitors) or it is MUST change for DIS COP style?
Jerry

 

[cribbj]

jtjerry, I'm sure it's possible to setup the AEM with the standard ignition (they have an application for the 2JZ-GE motor with distributor), but would you really want to? One of the beauties of an aftermarket standalone EMS with ignition drivers is being able to upgrade an older ignition system like the early 1UZ to something more modern with higher, more accurate output, not to mention eliminating the secondaries, cleaning up the engine bay, etc.

If you're already spending money on an aftermarket standalone, you must be looking for tuneability and higher power levels. Why not upgrade the ignition too?

John

 

[cowboy bebop]

So far in theory, it's looking like AEM is the jewel here. Which is VERY good for both us Supra owners and 'uz-fe crowd in general since there's so many good tuners across the country. I am curious so actually see it work since all of us AEM using Supra owners are heading generally toward the same end.

Eric

 

[Red Supra]

A lot of wires out of the stock SC400 harness can be removed to use in a JZA80.

 

[jtjerry]

ok AEM has two EMS: one for supra turbo one for supra/sc300 NA. witch one chose for 1994 sc400?

 

[Red Supra]

AEM will no longer have the NA and a separate TT ems. The difference is in the way the tach is driven and thats adjustable via a jumper inside the ems box, the units are otherwise the same. Either one will work. Right now the AEM EMS is light years ahead of what haltech or autronic has to offer. I've used a haltech before and played with the autronic software. I'm not bashing either, but when there is an ecu that works with all the stock sensors and plugs right into a harness that i already have the choice is obvious to ME.

 

[Philly#1 Lex]

So has anyone done this yet? And do you have to takle it to a professional to tune or can you tune it yourself? I am in Italy and i am very sure that no one here runs AEM EMS. Does anyone if there a re tuners in Europe? I am really interested but I have alot of questions about which stand alone to run. Or to just leave stock ECU and try piggybacks? Help. My car is a SC400:feedback:

 

[ranger2339]

Any updates here???

Josh

 

[ranger2339]

For what one?? what do you suggest i run my project with..AEM sounds ideal...I plann on doing coil plugs also like the JZ series....

Josh

 

[cribbj]

First welcome to the forum. We have several Supra owners here who have become interested in the UZ platform as an alternative to the 2JZ. In the US, the 1UZ is in its infancy as far as bolt-on mods go. It's sort of like the 7M motor was in the 80's, and the 2JZ in the mid to late 90's. Our Australian colleagues are at least 10 years ahead of us on hotrodding this motor (and probably hotrodding in general. At last count there were at least 6 state of the art, EMS's designed and built in Oz. Hmmm, how many do we have in the US now?)

In this forum, many things are being done with this motor for the very first time, so it's a lot of experimentation, and true hotrodding. This is a sharing experience and we enjoy discussing our discoveries and successes, as well as our failures. We do encourage those who contribute useful technical information to the community, and discourage those who try to commercialise the free knowledge gained from this site into proprietary "for profit" products.

To answer your question, RedSupra is probably the furthest along on getting his AEM to work with the 1UZ. Mitch Pedersen at AEM was kind enough to develop a 1UZ test configuration file for me, based on the 1100 box for the TT Supra, and I passed it to RedSupra several months ago. We've not heard from him recently and don't know the current status of his project, but he was "near to starting" the 1UZ when I sent him the AEM file.

TurboAndrew will also be using an AEM for his 2UZ Supra, as I am for my 1UZ project.

I also think Cowboy Bebop is planning on using an AEM with his 1/2UZ along with some sort of proprietary hybrid harness which he is developing.

There's several COP projects going currently, and probably mycarhaspossessedme's thread shows them off better than the others. Do a search for his threads, and you'll find more than you ever wanted to know about COP's for the UZ motor.

John

 

[ranger2339]

Thanks!!

Ill be doing a TT, Stroked 4.7L,v160 to my SC400...

This placs is very professional and helpfull.....

Josh

 

[WICKED SC400R]

1. Would a 92'+ SC400/Supra AEM EMS be able to run a 98' GS400? are the pins the same as the 92' SC400?

2. How would a six speed manual TT V8 98' Lexus GS400 run off a EMS for a Supra? Would it even work? I would assume like said before a 98 mr2 is different than a 92 mr2 even if the pins are the same.

3. I guess I am asking is the 98 1Uz out of the GS400 is wired vastly different than the 92+ 1UZ's from the SC400. Can it be corrected easily if not:no: ?