[Werner]

Of course, it's not that easy!


Every engine power means more or less wear, never without. If the power is increased, so is the wear higher. But unfortunately not linear, but squared. (Multiplicator²).
Increasing the compression increases the efficiency of the fuel combustion. But at least two factors are very important for this:

Combustion pressure increases the combustion temperature in the combustion chamber.

Much more serious, however, is the higher load on the crankshaft and connecting rod bearings. This can easily be calculated on the surface of the piston head surface Pressure : cm² / inch² and the increase in compression and the working pressure.

Increasing from 4 to 5 bar / cm² gives about 50% more pressure on the sliding bearing surfaces.
Since the A motor has no pressure circulation lubrication, the crankshaft bearings are quickly at the limit and overloaded, the wear increases disproportionately!

If it was my engine, I would not make an increase in performance. A revised engine with modern bearing tolerance and optimized material pairing yes. But not with an aged engine with an unknown life.