[Silverback51]

What is your plan for the car?

Change just for the sake of change is not a good plan, and you probably will not be happy with the result.

If it's quick/fast enough, then leave it alone. If not, determine what HP range you want and then figure out the plan to achieve it. And it may be more than just the engine. Other components may require upgrades also.

It sounds to me that you are unsure what you want.