SI engine modelling and increasing its power

1. Following are the screenshots of important parameters after running the case at 1800 rpm:

2. Initially i got the following readings with no changes made:

Now 10 % increase in brake power at 3600 rpm meant that the new

brake power =16.31527 + 0.1(16.31527) = 17.9467981 KW

To achieve this , i made the changes in the cylinder geometry.

new bore = 88.3 mm, old bore = 86 mm , new stroke = 88.37 mm,

old stroke = 86.07 mm, new compression ratio = 10, old compression ratio = 9.5

which resulted in 10% increase in brake power.