yeah, I guess so. I suppose the real art is getting the impeller and turbine sizes to be where you want them.
I still say that if the comressor housing is larger, and the exit nozzle is larger in diameter, you will have cooler temps for the same amount of cfm of air.
I mean, everyone can do what they want. I just dont want anyone to regret getting a smaller turbo, then regretting it.
When you want to make the solstice go, you will be shiftiing and driving between the 4-6k rev range. Do you really want to have the boost at 2k, but flatten out at 6k? ..I doubt it. Why not have boost come on between 3-4k and pull hard till the end. Even if you can get the AR ratio to that effect in a t28 ..it will still be creating more heat than a bigger turbo.
Also, The trick for making good power is to getting as much air through the motor as possible. manifold pressure is simply the resistance of air going through the motor. Big turbos have the umph to knock that air through the motor , like a big baseball bat knocks a ball further, easier than a small bat.
It remains to be seen, but because the ecotec makes good torque down low, I suspect that a big turbo will spool up fairly early on anyway . A t3/4 or the new gt35 would be my choice in my thinking anyway... Like a AR 70 compressor housing...Its a 2.4 motor