I wasn't implying you buy these cars to turbo them. I'm saying they are tuner cars capable of being wound up to be extremely fast. But when I buy a sports car I wanna know that all my options are open. Whether I FI or not. A car that can't FI doesn't sound like a durable sports car to me.
Look at the Z as a whole package, Suspension, motor, drive characteristics,capability, price then look at its best numbers stock. 4.6/13.1 155mph top with 1.01g on sport pkg and then compare. No one comes close in the V6 segment at 35k.
The mustang is an impressive v8 package. But its a different type of car. In the end v8 to v6 is a pointless arguement. When the v6 mustang camaro challenger and genesis coupe are out performing a Z bone stock. I will say the Z needs to beef up.
To get better performance you still need more cylinders or more cash. In the end I'm just glad I can add an extra 125hp for about 8grand. That's just me though...