Hey Mate,

You may find that the aftermarket Boost solenoid works better than the factory one so your not getting the thing staying shut and flying open at the desired boost level.

as for smooth power delivery, that's mint I had my 09 Ecutek Tuned at Maximums, thought it was no change until I went and did some track work.

masses of horsepower down low might not be what its been tuned for, you might be getting a progressive map for top end speed or whatever the tuners "flavour" is.

If you want punch...buy a two stroke motorbike.

my 2 cents