The original OEM compression ratio of your engine is the ideal compression ratio for the engine. In addition to understanding the effects of raising or lowering an engine’s compression ratio, you also need to understand how fuel octane, alcohol percentages, type of fuel injection (port or direct), boost levels and types of driving will factor into selecting the ideal compression ratio for your application. Instead, these effects are rooted in science. These effects have nothing to do with feelings or emotions. To avoid being deceived, you need to take the time to understand the effects of raising or lowering an engine’s compression ratio. If you take away anything more than the person that took the time to post this content has an asshole just like me, there is a 98-percent chance you have been misled. Look on a forum, blog, Instagram or YouTube account and you can find a number of “engine builders” sharing their thoughts and feelings on the best compression ratio for a particular engine or application. O pinions are like assholes and everyone has one.
