USDM VS JDM ECU's

[WannabeSI]

I have a B16a obdII swap and I have the jdm ecu that came with it and a usdm obdII ecu from a 99-00 si what one is better? do you know the differences between them? Let me know Thanks!

 

[xj0hnx]

You could try plugging them in and seeing if there is any difference.In my old 86 si I switched to a edm ecu and it made a difference,so try it.

 

[posol]

run the 99 si ecu
jdm ecus are speed limited to 113.

 

[ngq]

jdm ecu looks for higher ron (octane) than usdm ecu & 99 si is obd2b (last
plug on ecu empty).