I know what youre talking about with the early Galant and GSR 4G63 2.0 and 4G93 1.8 turbos- they were funny things to drive, especially off boost.
If I have two friends who can run near on 2 bar of boost through small cap, 4 cylinder, 8v engines, both will sit their respective cars sideways up a straight piece of road on the way to mid 12 sec quarters, yet both could easily walk away from a V8 on the track thanks to light load throttle repsonse and torque, I dare say its not coincidence.
The smooth power delivery you talk of with blowers is because their rpm is directly related to engine RPM, and turbos, with Load (throttle position). The reason youre thinking a turbo has lag, is because once the compressor is spinning, it takes time for its boost threshold to become REALLY apparent. Generally mid range- to hi rpm.
A Centrifugal blower will do exactly the same. Go drive one and tell me otherwhise. Its still a compressor that needs to be spun at a certain RPM to give its best result - just because its spinning with the crank doesnt mean its any better. Makes it worse. A Positive displacement blower will give you a kick in the pants for 3k rpm and die off after that. Crap. And you can only pump 4psi out of one, and cant spin it- its like emptying a beer through a funnel into someones point- they cant drink it any faster!
The reason Funny cars and Top Fuel racers use blowers is because they get more torque out of a postiive displacement blower. They cool the charge with NoS, and the 4-8psi they pump feeds 8 ltrs worth of hungry V8 and they needn't worry about pipe length, firing order grouping of exhaust manifolds, and having a turbo sticking into the air. Nothing to do with throttle response at all. Especially not flowing enough air to make the hp- We have V8s over here with twin turbos on them turning over 1100kw at the wheels in serious dyno competitions... thats nearly 2000hp at the wheels. Not a blower in site, and not single blower can touch them ANYWHERE in the rev range.
Need I remind you of the sort of ancient compressor technology that got 1500cc BMW fours based on production blocks making 1500hp?
Remember the Porsche 962?
Anyway- just didnt want any of you to go rip the turbo off your Delta or q4 thinking that a blower would do a better job.
Garret make an off shelf 400hp GT28 that is the same size as a moderate T3 with ballbearing cores, and different wheel cuts. No Lag, heaps more power.