is a 91 super tigre enough motor to fly the goldberg ultimate if it come out light I know it is not going to be a powerhouse but what I am concerned about is if you get in a little trouble with it is it enough power to pull it out and just fly it ok

It will be fine. I had a Saito 100 in mine and I was not satisfied with the setup. It just wasn't enough vertical power. Sounds like you've already got a .91 but haven't installed it yet. you will be pleased with the airplane, it flies great and lands wonderfully for this type of A/C. Good luck.