Learning Reference Sites

[redledsled]

Hi guys. I'm still learning about how the math of all the engines and gears and stuff go together, and how to pick out certain things, like carbs and diff. gears. Are there any good sites that list ratios and formulas like those, or show you how things work together? It would've saved me a couple years of learning if I'd remembered that Google exists, and I'd love to show some other people some stuff that took me forever to learn, so I'm hoping there are some better places than Google. Thank you guys!