i wud need scientific data before i believed anyone or anything on this topic anymore lol,
I am just going to try the ECUs that i have, listen for Det (with my listening device), pick the best one based on performance and lack of det, then get a AFR test done, then i am done
If you were talking to Dave from PF Automotivbe hes the owner and very well respected in the Rally Circles from what i know. Kooms mates rally car from CHCH gets looked after by him even though hes in Tauranga. Had subarus for years and when i went to the workshop last year had some REAALLYYY cool cars in there lol