is there a certain "formula" to figure out what AR size is efficent at certain rpm?? i'm just tying to do some planning and i wasn't sure how to figure out what size turbo is good for certain psi..blah blah blah..thanks

 

ofcourse there is, i think theres a sticky at the top of the page

 

no ----....i didn't even see that sticky...thanks for the heads up...and not acting like an *** because i didn't read ..lol..thanks