This is what i did but what did i do wrong here?
Have you utilized breakpoints to see how the code is being executed? (right click on a node and add a breakpoint) This is a very useful tool when troubleshooting issues in your code.
Assuming the order of the inputs is correct to allow the branch to be true, it looks like you have two separate variables controlling the rotation speed (Opp Rot Speed and Boost Opp Rot Speed). If this is all the code you have that influences the rotation, nothing is going to happen because the variable that is used to Add Local Rotation (Opp Rot Speed) isn’t the one being increased by the boost input.