I'm kinda new to the whole Honda tuning thing. I know they spin like mad, make mad power when boosted, and get awesome gas mileage. But can someone tell me whats with all the ECU number/letter combos? Like p73, p50, etc. What does that mean? Is one better or worse? Any help would be shweet.

 

the identify the engine the ecu was originally made for

p73 = itr
p72 = gsr
p30 = jdm b16

etc.

using an ecu from one engine on your engine wont give you any sort of gains without tuning. and you wont need tuning without significant mods.