No, Noah did not find favour with God because he
did right. God found him to be righteous because he believed God. Just like Lot in Sodom. He was counted as righteous because he believed God.
What shall we say then that Noah, as pertaining to the
FLESH, hath found? He hath whereof to glory, but not before God. His wages for what he "did" was not of grace, "but of debt". Romans 4:4
Just as it was Abraham's here....
Romans 4:1 What shall we say then that Abraham our father, as pertaining to the flesh, hath found? 2 For if Abraham were justified by works, he hath whereof to glory; but not before God.
God counts man as righteous when they believe. God simply doesn't give man credit for those things it is his duty to do. If you can't see that from what is so clearly written, you're hopeless.
Romans 4:3 For what saith the scripture? Abraham believed God, and it was counted unto him for righteousness.