poodles said:
Do a LOT of reading on turbo theory and how they function, hell I don't even know that much (since it's as voodoo science as cams are), but you need to learn as much as you can to make educated choices...
How are turbos voodoo science? The basic concept is VERY easy to understand. Your expelled exhaust gasses are spinng an impeller. Think of it as blowing into a pinwheel. Now picture that pinwheel being connected to another pinwheel (the inducer) by a shaft. The "fins" on this pinwheel are curved the opposite direction. Now, as that impeller gets spun faster and faster, it's also spinning the inducer, which is taking the incoming air (air intake) and forcing it down the throat of the intercooler.
See? Easy!
Cams are also not too hard. You've got lift, and you've got duration. The longer your valves are open (duration) the more air can come in and the more goes out. Your lift also has alot to do with what can come in and out. If you had a 272 cam that only opens 9mm, only so much can come in. But if you have a 272 cam that opens 9.3mm, you're getting more in/out.
272 is your duration in degrees, it's open for 272* of a full rotation, which is 360*, obviously.
Now, this also works in reverse. If you have a cam that's 280* 9.3 and a 272* 9.3, the 280* cam is going to allow more in/out than the 272* because it's open for longer.
My big "voodoo science" as you called it, is the actual valvetrain itself, softer spring, stiffer spring, oversized valves, etc...:nuts:
