Speedbump, save that tutorial to your harddrive because you know that question will arise again!! lol
Nitro tuning is such an experiance, and that's what it takes to learn is experiance doing it.
Once new guys learn that engine life is described in gallons and that you can run a gallon in a day or weekend if you try... they start getting more familiar with tuning on the second engine.
The way to make an engine last is tune it right, and not full throttle runs to often or to long. I think even tuned right full throttle runs kill alot of engines. When I'm on a track the cars rarely see full trigger. Half the time my throttle epa is limited so they never truly see full go anyhow. The only time they see parking lots or driveways is to get the tuning somewhat dialed in after the engine has been torn down so I know it'll at least start when I get to the track. Then at the track is when you get em tuned for the races.
Some don't realize they need daily if not hourly attention to the needles.