Optimus

I'm thinking of getting the TOM's supercharger for the 350, but since it comes with a remapped ECU, is it based on Japanese 97 octane gas?

IStreefidy

haha good luck gettin that.

Optimus

I'd have it as soon as it is available...if I knew what octane the ECU was based on.

Xelvic

not nice

lobuxracer

iTrader: (2)

You realise the ECMs are not interchangeable?

Hutch27

I'm sure they should have something available for us if it ever becomes available in the U.S.. I would be surprise if they just have the SC system available here but wouldn't be compatible to the U.S. Lexus IS model.

omgitsroy

iTrader: (1)

i might be wrong but japans octane rating is comparable to our 91~93 i believe.. something with the scale and mixing... anyone know anythin bout this?

SPEED&ECO.

97 octane there is like 92 or 93 here

lobuxracer

iTrader: (2)

^^correct. They use research, we use (research+motor)/2. Premium fuel around the globe is within a point or two unless it is race gas. Same is true in Europe. Big numbers, generally the same performance as here. There is a LOT to this subject though.

lobuxracer

iTrader: (2)

Agreed. The point is, if you import a Japanese model kit, you will not be able to plug in the ECM and have it work.

clubfoot

lobuxracer is it just the pin outs/ connectors?

Optimus

What's the difference? WHy was their effort put in to make two completely different ECUs for the same car, sounds anti Toyota to me.

Plus, wouldn't cutting and splicing work? Works with regular engine managements. Any engine management systems in the works? I'm still trying to figure out how to install one, but the 350s injector arrangement scares me (or just because I don't know much about it).

4TehNguyen

iTrader: (1)

im guessing each country has different emission or diagnostic standards therefore there will be a difference in the amount of sensors needed to be inputted to an ECM therefore a difference ECM

Optimus

I was assuming it would be more of a cost saving benefit for Toyota to use an ECU with enough I/O for all configurations and flash it for each application.

lobuxracer

iTrader: (2)

None of the above. Toyota use different technologies for different requirements. Japan generally uses MAP for fuel management, but US emissions requirements are easier to meet with MAF. Completely different software approaches to cracking the same egg. They are completely incompatible, and often have differing pinouts and wiring harnesses.

I haven't 100% confirmed this is the case, but I know it has been in the past with other models. I have been told the ECMs do not interchange, so swapping them will not work.

I have seen Toyota do this with both electronics and mechanics. If you've ever tried to put J-spec turbos on a USDM Supra, you know exactly what I mean.