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In the video it is assumed that increase compression also increases power potential. The tone and method of verbal delivery indicates there may be some downsides to higher compression, assuming all things are normallized.
What are some of the drawbacks?
Brandon,
When airflow is limited, then compression becomes a great tool to add power, but if your engine package can flow tons of air, perhaps with a big turbo, then the combination of more airflow, less engine compression, may produce more power.
Increasing compression on fuel that doesn't allow you to achieve MBT also requires retarding ignition timing advance to avoid knock. With enough compression, timing may need retarded to the point that EGT get excessive, and again power may actually be higher with a combination of lower compression and more ignition timing advance.
Optimizing a setup is a balancing act as you try to find the best combination of physical parts, fuel, tuning settings, and vehicle use. Tons of one thing and little of the others is rarely the best combo. For example pushing a turbo really hard may cause high charge temps which require retarding timing to avoid knock, to the point of making less power than turning the boost down and running more ignition advance.
