Sorry. That was unclear. Advance in degrees can be linear in relation to rpms, but advance in an actual time interval would not be. e.g. The 0.0017 seconds in above example.
The faster you compress a gas, the more heat will be generated since there is less time to dissipate the heat. This extra heat will add to the potential for detonation.
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351W 89 Mustang GT Convertible