"Most of all though, the Evo excels because of how confidence inspiring AWD can make a car. I doubt there is ANY production car a total noob could take to a tight technical course and run faster than an Evo, even if dozens of cars would be faster when driven by skilled drivers. "
sorry, but that doesnt make me feel comfortable at all, knowing there is some 18yr old that his parents(its always a he.) bought him the car that he's always wanted for highschool graduation and he's only had his licence a month or two, and he's doing 140 on the highway, because he thinks awd is going to save him no matter what. lets get this straight, awd, is great for acceleration, thats about it, in turning if you floor it, you will understeer, power going to the front wheels overloads them and causes them to understeer. sorry, awd is great for acceleration, thats about it, i've seen more awd/4wd trucks stuck in the snow, than i've seen of any other car, because they get arrogant thinking they can get out of anything because of awd.
"Generally when you tune a car, you're increasing top-end HP, and don't care much about what happens to the low end (after all, if you're performance driving that far from the redline, you're not doing it right). As applies to a turbocharged car, that often means you're putting in a larger turbo to move more air at higher RPMs, but the tradeoff is usually that it takes longer to spin up. Since gas engines rev up faster than diesel, what would be a barely noticeable lag on a diesel is very evident on gas. It almost feels like someone magically swapped your engine for a bigger one halfway up the tach. "
this is also WRONG. its not because your revving faster, its because diesels have LARGE displacement, look at how big the engines they have are in trucks, 5 liter roughly. how is a turbocharger powered? Exhaust. so why does a turbo spool faster on a diesel? lots of exhaust gases on a well sized turbo for the application and power requests. Go to a gasoline powered car, and you have a much smaller engine with less exhaust gas. Get some kid who doesnt know how to size a turbo right, and what do you get? lots of lag. And im sorry, when i swap my motor to a turbo 2 motor, im not going for top end power, because if you tune for just top end power, you leave nothing elsewhere and no torque. Look at the porsches and audi's, look at the torque powerbands they have, start early, and end at redline, thats how a turbocharged car is supposed to work. im around diesels all the time(LMTV's MTV's HEMMIT's, with turbos the size of my friggin head)
superchargers/turbochargers are there to theoretically increase displacement through compression. atmospheric pressure(doing a swag here) is 14psi, you get your turbo running 14psi over AMBIENT pressure, makes it 28psi(but they dont work at 100% efficiency and then there's heat because of compression so its less than 28psi, thats why you dont see a 100% increase in power when boosting.), therefore increasing the intake charge by 100%(and you dont get 100% of that air when the intake cycle is occuring, you get maybe 90% of it at best). thats why turbochargers are best for high altitude applications, because even at higher altitude when superchargers only increase pressure at sea level, a turbocharger will retain pressure up to a certain level because of the wastegate/blowoff valve wont open untill pressure is achived.
addition: i figured someone might not know what swag is, its scientific wild ass guess.