i'm thinking about putting an STi TMIC on my bugeye. just wondering if it will run lean with larger than stock IC? thanks!

 

You won't run lean but you won't gain much without a tune. In simple terms and a simple answer to you question, there are no ill effects with installing an STI TMIC onto your car.

 

ok good. i feel a bit safer now. do you mean protune or any tune? i'll be running cobb stg2

 

Protuned.

 

i ran lean before i got tuned

 

Do you have some kind of datalog to show you ran lean? Did you have an aftermarket intake as well? Just installing a STI TMIC will not make you run lean and if you do run lean it should be a very little difference.