How much timing to pull

Looking for some advice. I am new to turbos and had a RZR 1000 XP4 with a Silber Turbo Kit I just installed. I decided to go with the Autotune and just installed it. I am running stock internals for now but will upgrade soon, I hope. For now I am running with no spring in the wastegate and hitting about 8 PSI. I want to pull timing but not sure how much. I’ve heard .5 -1.0 per pound of boost. Can I pull more? How much is too much? Any help would be appreciated. Thanks