Alan Baker
You really can't discuss turbos if you have no idea of even the basic concepts. First you claim the turb HP figures I post can't be true, then when shown they can be achieved on even a mundane econocar you start claiming it must something else they have done to the engine. The basic rule of thumb is you double horsepower by doubling the pressure (15lbs) running 7lbs will give you about 50% increases in HP. So in answer to your questions:
Me: The extra power was also a result of different heads and other improvements to the basic engine.
You: In other words, it *wasn't* just turbocharging it that made the difference...
Answer: As I've stated all over this thread you have to input extra fuel and air into an engine to increase power output. If you want to go beyond what a turbo provides in a given boost range ( eg over
You: Right. And you have to account for the difference between throttle-body fuel injection on the normally aspirated engine which produces 96 hp, and the multi-point fuel injection on the turbo version which produces 146 hp. Or are you going to claim that they added multi-point injection for the fun of it?
Answer: I've already been all over this, none of the parts used to increase the 84hp 2.2 to 96HP were used on the 146 HP turbo motor. They used the multi port injection because it allowed far more precise metering of the fuel than the throttle body injector.
