geo, i was talking in comparison from a small turbo to a large turbo. any small oem turbo regardless of if its hybridised wont rip your face off. i was really getting at the fact that although itll give you a little push in the back, its never going to be as good as a turbo designed for higher end performance. like a td05 or something. i also said a stock situation. you use a fmic, which plays alot to the power delivery. CT9s are way out of their efficiency band at anything over about 10 psi. they were originally designed for diesel motors that run only a few psi of boost. thats why a fmic gives such a dramatic change to the 4e. because you are remedying one of the big flaws in the stock setup, the shit charge cooling. at the end of the day, pressure plays its part, but its all about flow rates. for example my td06 flows more air at 6 psi than a ct9 does at 15 psi. you can only fit so big a compressor wheel into the tiny ct9 housing. so its never going to be a neck breaker. saying that, its not going to be a slow poke either. but the delivery wont differ that much from a ct9.