Even with no dyno, it’s possible to try and do an awesome career of tuning the ignition timing (if the spark plug fires), and for that you can expect to need an Audio Knock Detection system to observe for knock. (Enjoy this video to listen to what knock looks like) https://car-performance-shop-near26787.theideasblog.com/30185070/5-easy-facts-about-unlock-car-door-service-near-me-described