Your life will probably be different than it would have been without the name change, but it's not required to be different.

How different it will be depends on three things:

1. How different the numbers of the new name are compared to the old name and in relation to the other numbers of your numerology chart. I was unable to determine with certainty what your new name is from the content of your question, so am unable to comment on the name number differences.

2. How much you identify yourself as the new name. The more you think of yourself as the new name and the less as the old name, the more presence the energies of the new name have.

3. What you do in your life. If you end up doing pretty much the same things with the new name as you did with the old name (same job, same family, same friends, same hobbies, and so forth), then your life will be pretty much the same as it would have been. On the other hand, if you live your life differently (different job, live in a different town, make different friends), then your life will be different than it would have been.

With a life period cycle resonating with the number 8, it's understandable that you wish to predict and be able to control.

It comes down to this: A new name will provide different tendencies and make different things likely according to how dissimilar its numbers are from the old name. How strong those tendencies are and how likely certain things are to occur depends on how much you identify yourself as the new name. Then, what it all comes down to, regardless of the likelihoods and tendencies, is that your life turns out to be as you make it, the things you do and don't do.