To be honest Paul i don't have a massive wealth of driving experience in single turbo supras to compare to. That said, it seems to pull better in the low revs than my bpu setup. It is in no way laggy or unresponsive at all, it has a nice load of pull from about 2000rpm and the part throttle is very responsive and strong. The boost threshold is very low and it seems to get into decent positive boost instantaneously. I'll keep a close eye on things next time i go out and give you some feedback but it'll only be based on the rev counter and boost gauge for now. Also, with full throttle i only have up to about 3000rpm to play with as it gets to Ryan's fuel/spark but at 0.8bar in no time at all. Basically the majority of my driving has been part throttle normal driving and in that scenario i haven't found it lacking at all. . . Feels like a 5litre