jdm vs usdm 7mgte

[toyolla86]

so i was reading wiki and trying to find out the differences between the jdm and usdm 7mgte. mine has the jdm 7mgte from what i was told.
wikipedia makes it sound like there is no difference between US and JDM. but isnt the turbo bigger in jdm engines.

any other differences that people know about?

 

[hvyman]

Nada. Except the fact that jdm ecu is tuned for no egr and jdm engine just have block off plates.

Everything about the motors are exactly the same. Same turbos, same heads(both na and turbo have the same head too), same blocks.....

 

[ubersonic]

What hvyman said, but I just thought id add that the JDM 7M-GTEU used in the Supra Turbo-A had some mechanical differences though I doubt you have one of those.

 

[Scruggs86.5T]

Also the throttle cable configuration was a little different being that it came from the other side of the firewall. Along without having an egr the vaccum system was layed out a little different due to that. There was only one vaccum nipple coming off of the top of the throttlebody.

 

[toyolla86]

great thanks for the input everybody. so my engine came with 230bhp. thats good to know.

 

[digihonk82]

yeah I had a JDM throttle body with one nipple and the prongs for the tps parts are vertical instead of horizontal.

 

[hvyman]

Tps prongs is a year thing. Tb are different in the fact of the nipple and the way the throttle cable mounts. Size is the same.

 

[Rollus]

Hi guys.

In 3p tccs hacking thread, we learn that one resistor need to be changed to put the ecu in jdm mode (no egr for sure, maybe no canister).

Can give you a direct link to the post if someone ask. (Need to search in my favorites)

My 2 cents..

RolluS

 

[Supra28]

Hi guys.

In 3p tccs hacking thread, we learn that one resistor need to be changed to put the ecu in jdm mode (no egr for sure, maybe no canister).

Can give you a direct link to the post if someone ask. (Need to search in my favorites)

My 2 cents..

RolluS

Do post link please...

 

[hvyman]

Its one of the stickeys in the general mk3 section or 7mgte tech section.

Jdm still run charcoal canisters.

 

[Nick M]

The engine is no different, hon-duh boy. The cars are different because their steering wheel is on the wrong side and they don't have a NOx requirement.

 

[RazoE]

Oil squirters are also missing in some JDM 7MGTEs and the oil pressure senders are different (metric vs imperial), but that's about it..

 

[hvyman]

Oil squirters was a early block design. I have one. Old thin block with all the turbo feed and drain ports but no squirters.

 

[Rollus]

Do post link please...

Here is the link to the direct link to the post: http://www.supramania.com/forums/sh...bly-Analysis&p=1317537&viewfull=1#post1317537

Here is the post quoted:

To convert the ECU to use the JDM maps and delete EGR you simply need to add a 100 ohm resistor to R606 and you will be in business (only verified on 7MGE 86-88 ECUs, but I'll get to the GTE ECUs in a while, and I'm sure they behave in the same manner).

Here is the resistor and the iron:
no just kidding haha.

The interesting thing is that not only it make the ECU EGRless, but it also switch to jdm maps. In Japan, I think at this time they didn't worry about NOx, so the JDM map should be good for more power but also be bad for the planet: more power, more pollution.

 

[hvyman]

Not tuned for more power. Just tuned for no egr and speed cut.
Nox is a by product of combustion.

If anything it would be tuned for less power but since the 7m only has 232 hp it doesn't fall under the 280 hp rule like the 1jz and jdm2jz.

 

[Poodles]

Oil squirters are also missing in some JDM 7MGTEs and the oil pressure senders are different (metric vs imperial), but that's about it..

Correct, as the Supra never came with the 7M-GE over there, they were all GTE's

Here is the link to the direct link to the post: http://www.supramania.com/forums/sh...bly-Analysis&p=1317537&viewfull=1#post1317537

Here is the post quoted:



Here is the resistor and the iron:
no just kidding haha.

The interesting thing is that not only it make the ECU EGRless, but it also switch to jdm maps. In Japan, I think at this time they didn't worry about NOx, so the JDM map should be good for more power but also be bad for the planet: more power, more pollution.

I don't see that he confirmed it to be that way on the GTE ECU... You definately won't make more power though...

 

[toyolla86]

so i can get a replacement ct26 turbo anywhere and it will be the same. mine has chewed up fins.

 

[RazoE]

Make sure it's off a Supra, as MR2/Celica CT26's are different, as are Land Cruiser CT26's, etc..

 

[toyolla86]

oh thats where the different ct26's come into play then.

 

[Supra28]

Wow, I never knew there were different CT26's out there. Good to know.

Since we're on the topic of ECU's, I have a quick question for those of you that may know. Are you able to eliminate the AFM simply by a JDM ECU?