If anyone could give me a link to a similar or the same post it would be much appreciated. I just had a question about ecu's and which kind, if any. Can keep the turbo constantly spooled. I wouldn't be running high psi probably 6 or 8. All the posts I read, talk about waiting for the boost. But in most manufactured cars the turbos are usually always on. Either that or they have a really low boost threshold. If this is the case what turbo would be required to have constant boost from say 2500 to 4500 rpm? For example the new Turbo Beetle has a similar powerband with the use of a turbo. I read about how the supercharger like JSC gives really good low end torque, but even that I think has a bypass valve so it is not always boosting correct? Sorry for the long post. Thanks for your time.