Well thats the way i understood the question, which is the reason i said none..I Guess mike took it the other way.... I do know to get full potential from a nice sized single, standalone is the way to go. But stock boost around 400whp is safe on stock ECU...Some go for more and exceed, but tunning becomes less safe with the stock Ecu as the power increases..
Thats when things like map ECU, SAFC...etc are pretty good tools to use...After that is full standalone for the 550-600whp guys...