ORIGINAL: The Real Dogman

Hey Jay(just cant help myself) here is an image that might help:

And a link to the [link=http://www.cenracing.com/downloads/enginemanualv2.zip]CEN Nitro tuning guide book[/link]

And a couple videos that should help:
[link=http://www.youtube.com/watch?v=pEGjExP9GkM]Traxxas Nitro Engine Tuning Video[/link]

[link=http://www.youtube.com/watch?v=oSmMzpZM_As&mode=related&search=]HPI Nitro Tuning Video Part1[/link]
[link=http://www.youtube.com/watch?v=BJFsJAxNoRg]HPI Nitro Tuning Video Part2[/link]

You also would benefit from [link=http://www.rchardware.com]The N-Tune Tuning Dial[/link]. Its a huge help tuning and keeping track of your day to day tune as well..

Hope this helps, and feel free to ask Q's