here is a few links with some of the info you have requested, hope it helps, should be some good basic learning, more than enough to get you started......also remember,
www.google.com can find ANYTHING
nitro engine tuning basics
http://www.rchobbies.org/cars_eng-tuning.htm
RC car handling - an introduction to vehicle dynamics
http://users.pandora.be/elvo/
understanding silicone shock and diff fluids
http://www.twf8.ws/new/tech/tip/shock.html
understanding your cars suspension
http://www.horizonhobby.com/Articles...ArticleID=1562