The Hulk as yet has NEVER reached a limit to his strength and that would correspond with he has NEVER reached a limit to his rage...So can you tell me that his rage is UNLIMITED - i think not...
Back to the feats of the Hulk - there is no way Thor could strike with as much force as an enraged Hulk. If you would like some examples of feats performed by the Hulk that Thor could only dream of accomplishing - I would be more than happy to show you.