ECU question

[s14hayame]

After reading someone thread i got a llttle confused. Does the s13 redtop and the s13 blacktop use the same ECU or they are different. if they are different please help me with they ID numbers which goes with which. :goyou:

Thanks

[gsracer]

the will both work on a redtop, however the iirc the black top ecu on a red top will make the engine run a little richer than normal.