jdm 7mgte more power than usdm gte?????????

[jdmmilhouse]

i thinks pics of my engine bay wont help, all of my emissions components have been removed so any open vacume has been pluggd

[MA70-3.0GT]

cre-: Given that the JDM ECU would actually have to pull timing any time that the EGR system is active the JDM 7M would make less power.

Shouldn't that be the USDM? JDM has no egr does it? Or do you mean that on the JDM it would have to pull the timing back in situations where the EGR would have been active if it were present?

Interesting note on the GE ECU's containing both J & US maps though, especially if it turns out to be the same for the GTE lump's brain. If there was any specific advantage to one map we'd be able to swap without spending 100's on a new ECU.
I suppose, as you say there isn't any real power discrepancies between markets, the benefits would be limited to USDM owners just being able to remove the EGR both physically & "mentally" from their car...

Though I wonder if the different maps are stored on seperate chips? That could be a significant breakthrough for people suffering an ECU software failure of some sort if they were able to simply add a link or extra resistor to make the ECU revert to another chip & hence start it working again, albeit in the other country mode.

P.S. milhouse, any pics of any JDM engine bay would be better than nothing. If you don't have the time or something then no worries, I don't wanna impose, but if your car's running OK as it is & all else fails I could try plumbing it as per yours... (That said, I had a play yesterday & I think it's just a fuelling problem now anyway. Think the injectors are gummed up & sticking/leaking, and the cold start wasn't even plugged in!)

EDIT-: no worries milhouse, cre came through with some cool diagrams of a JDM setup here http://www.toyota-supra.info/forums/...html#post74926 so I'm set.

Cheers, Dan.

[cre]

Originally Posted by MA70-3.0GT

cre-: Given that the JDM ECU would actually have to pull timing any time that the EGR system is active the JDM 7M would make less power.

Shouldn't that be the USDM? JDM has no egr does it? Or do you mean that on the JDM it would have to pull the timing back in situations where the EGR would have been active if it were present?

If the JDM had EGR it could run more aggressive timing such as the USDM does when the EGR system is active.

Originally Posted by MA70-3.0GT

Interesting note on the GE ECU's containing both J & US maps though, especially if it turns out to be the same for the GTE lump's brain. If there was any specific advantage to one map we'd be able to swap without spending 100's on a new ECU.
I suppose, as you say there isn't any real power discrepancies between markets, the benefits would be limited to USDM owners just being able to remove the EGR both physically & "mentally" from their car...

As I said, it may be worth it just for the properly tuned timing maps.

Originally Posted by MA70-3.0GT

Though I wonder if the different maps are stored on seperate chips?

Nope, same chip IIRC.

[SuperSpartan]

Whats the EGR system?

[cre]

It's a system which is used to reduce combustion temperatures (good for emissions reduction but also good for engine longevity). It just routes a small amount of spent gasses back into the engine to pull down engine temps. Most cars have it (despite popular belief) whether it's accomplished using variable valve timing or an external valve system... The use of an extremely aggressive EGR system is how Honda gets such outrageous mileage and is able to run an engine WAY leaner than what's considered a safe and practical level.

[batmmannn]

When ever I start to think I know something about cars, all I have to do is come here and read your posts and I quickly realize I don't know shite about cars....lol

[SuperSpartan]

Ah i see, i think ill keep mine in my car then haha, i do seek to remove my ac compresser and all that mumbo jumbo, i love the heat. Would that affect anything?

And hahaha i agree batman, with my friends im the genius, come on the forums these guys are the Yodas

[cre]

Removing EGR is pointless. I'm not even sure if it's even open when at WOT... I'll have to look it back up.

[joshp]

im in the process of swapn a jdm na 7mge i found sum diffrences in vacume hose routing and lack of egr i mhope to have it running in a few days