hey guys, this sorta came up in my thread bout lightweight flywheels before, and i wanted to know what you think. basically what sort of effect does modifying a car have on fuel economy?

i know if you're running a huge turbo with larger fuel injectors on the track, then sure, you probably gonna eat a lot of fuel.

but what about smaller things, i.e., intake, header, exhaust? dont such mods improve volumetric efficiency,a dn as such improve economy at the same level... ie, given you dont drive harder, will you use less fuel?

and then say you tune it, i know that can be definitely used to improve consumpiton... im asking, can you modify a car lightly, and tune it really well, and end up having a car that pulls harder when needed, but drives better, more responsively and uses less fuel while driving normally... yeah im a cheap uni student but i also care about how much petrol im burning cos it affects the environment.

thanks! MoDCoN