If you're looking to tune your engine for more power, there are a few things you'll need to do. First, you'll need to increase the amount of fuel that's going into the engine. You can do this by increasing the size of the fuel injectors, or by changing the air intake so that more air is getting into the cylinders. You might also want to consider adding a turbocharger or supercharger to force more air into the engine.
Next, you'll need to improve the airflow through the engine. This can be done by porting and polishing the cylinder heads, and by installing larger valves. You might also want to install a bigger throttle body and exhaust system. Finally, you can install nitrous oxide injection systems or forced induction systems like turbochargers and superchargers for even more power.
With any of these modifications, it's important to make sure that your engine is tuned properly so that it doesn't overheat or knock. If you're not sure how to do this yourself, it's best to take it to a professional mechanic who can help you get the most out of your modified engine.