This is often a question that unitarians have to deal with (and subsequently anyone who is interested in salvation). My stance is that believing the trinity is NOT required for salvation:
#1 as a "born again" believer, you're a figurative baby, so a baby can't know a lot of doctrine
#2 salvation passages don't claim you need to know the doctrine of the trinity (except believing that Christ paid for your sins)*
*and this is where the 'grey area' occurs, does believing whether or not Christ is God change whether or not you believe *Christ* paid for your sins. Well, I think it doesn't because a 'baby' might not have yet learned that only *God* can pay sins. So the still believing Christ paid for your sins is valid. Not to mention many Christians who are trinitiarian still get the trinity wrong or don't understand it when confronted. Nonetheless it is playing with fire to say Christ is not God. And being a unitarian for too long will prevent you from growing spiritually, and you'll remain a spiritual baby, never growing like someone who believes in works salvation.