i have a few questions about turbos. being that most people on this forum are more knowledgable than me, i thought that this would be the right place to ask these questions. I DO NOT WANT OPINION. i want facts. i dont care if you had better luck wit this turbo or that. i just want to know wat it means.

what exactly is the difference between a dual ball bearing turbo and a journal type turbo? what is the advantage of the dual ball bearing?

what does the a/r size mean?

what do the sizes of the compressor and exhaust side mean? what are the advantages of airflow and lag with each?

 

http://www.turbobygarrett.com/turbob...ch_center.html

have fun learning.

oh also go out and buy the book "Maximum Boost" it has all the basics you will need to get started.