How can a naturally aspirated car be modified to improve its power?

Increase the displacement, strengthen at high speed, improve the compression ratio and change the camshaft with large angle. If the gas and exhaust are improved, of course, there will be strength, but the intake efficiency is high and the fuel will be relatively improved. Due to the increase of power output, the working environment of the engine becomes worse, so the internal components of the engine should be strengthened first.

Main advantages:

You can use a large flow air grid to make the air intake smoother, or modify the straight throat throttle. It can also improve the efficiency of the intake and exhaust mechanism, such as changing the cam curve, and even using the electro-hydraulic cam-less valve train to extend the valve opening and opening time. The power can also be improved by adjusting the parameter settings of the electronic control system.