My car has all of the BPU parts, plus a FMIC. I do not have a boost controller though. My boost is normally 1.2-1.3 bar depending on how cool the weather is. Is there any reason to have one? Will I build boost quicker with one? It's my understanding that even with a boost controller I won't be boosting any less than what I'm already boosting...so my question...do I really need one?