JDM vs. USDM...

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Oct 13, 2007 | 02:40 AM

1JZGTE

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From: IL

JDM vs. USDM...

i got a jdm 2jzgte from an Aristo going into my `95 5-speed SC, what are the +`s & -`s when comparing JDM supra ECU and USDM ECU? mph vs km?, etc...

Oct 13, 2007 | 10:53 AM

Duckness

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From: houston, tx

pretty much everything usdm is better then jdm.

Oct 13, 2007 | 11:34 AM

lobuxracer

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From: Georgia

ECM specific difference that makes a big deal - JDM is MAP (speed density) and USDM is MAF (mass airflow.) This makes a big difference for piggybacks.

Oct 13, 2007 | 11:38 AM

RaynArt

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From: Illinois

what do u mean mph vs. kph?

Oct 13, 2007 | 01:40 PM

1JZGTE

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From: IL

Quote:

Originally Posted by RaynArt

what do u mean mph vs. kph?

being a jdm ecu i thought i would make my speedo off...because the run KPH and we use MPH...but i found out that it has nothing to do with ECU...and its all in the speed sensor in the tranny i have which is W58

also could you guys break down those BIG differences the two have...

Oct 13, 2007 | 02:04 PM

jgdynamics

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From: Ca

injector sizes are different, which means the ecu runs the injectors differently.

usdm 550cc
jdm 440cc

thats all i knoe.. heh

Oct 13, 2007 | 04:33 PM

orangecar

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From: Maryland

So... If I bought a JDM front clip it would still be a pretty big pain to install? does anyone have a rough estimate of the addtional cost after buying the front clip?

Oct 13, 2007 | 07:51 PM

orangecar

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From: Maryland

Quote:

Originally Posted by Bean

You'd still need the oilpan and you'd need to decide on a tranny option plus harness options. JDM harness exits engine bay on opposite side and is different than the Supra and Soarer harnesses

So the W58 wouldn't work huh? Dealing with the harness sounds like a PITA but besides that, it doesn't seem too bad.