Quote:
Originally Posted by CaptainDoggles
Yes, this is true. But you can't just "apply more boost" unless the engine has specifically been designed to allow it. If your engine only has enough compression ratio to make use of 87 octane you will need to make modifications.
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Below full throttle height every supercharged engine has more boost available than allowed. The problem is to prevent the pilot from applying more boost than allowed by mistake. The boost control does that. The Merlin engine has a provision to disable the boost control (so called boost control cut-out).