Warning: Illegal string offset 'type' in [path]/includes/class_postbit.php(294) : eval()'d code on line 65 Does Temple Boost Holy for Call God? - .com.unity Forums
Pretty sure it will take 8 turns with 5 h1 priests. I don't think there is a modifier for having a temple. The call god action requires 40 holy levels, not 50.
Temples are only important for recruiting sacred units and calculating Dominion spread (as well as modifying preaching in a friendly province).