rb25det series 1 or series 2 ecu..differences?

[dethatch]

I have a series 2 engine and possibly a series 1 ecu..how can you tell..I have heard the s1 has a light on it. and s2 does not. aso heard you can run either on either engine...just want to make sure..

[stevespeed]

You would find better information if you posted in the RB section,

but the main differences are...

none that I really know of

[dethatch]

thanks posted there