Use cedar 4 x 4 instead.

 

There is no way to "stop" it. Some will stay straight, some will twist and try to curl as they dry out.
Did you set them on post bases so they do not rot out?

 

Yes I have them off the ground. Will they warp enough to let the roof drop or can i feel pretty good they will hold. How long does it take them to dry out.

 

4x4's tend to not warp as much as 2x wood as they dry because when they cut them they try to get the center of the tree, as you will see by looking at the end. That way they get the most lumber out of a tree. When you buy them look for a roughly-centered center at both ends. Seal the ends as soon as you cut to length to help prevent splits.

 

before installing them keep them inside laying flat.. or outside out of direct sunlight.. having them in direct sunlight will cause accelerated drying on one side which is what lends to severe twisting.. your other option is to just laminated 2x4 alternating the crowns so the deflection action is counteracted

 

Little late now for that, he's already built it.
Just keep an eye on it, checking (cracking down the length of it) will not effect the strength of the post.

 

if a post cracks fill it w/ construction adhesive, and a putty knife

 

I have two 6X6's supporting the main LVL beam in my basement. I carefully selected them, yet one of them warped over an inch. They'll be replaced with steel when I get around to it. I framed all of my interior walls with steel studs because lumber today SUCKS.

 

16x20 Carport

I have not replaced all 4 polls yet so i can change what I have so my question is this: Do you think the 4x4's are strong enough for this structure or should I use something else. Thanks for all the information so far.

 

The carport is 20x 16.

 

We have to use 6x6's for decks that have no snow load that a roof would carry