Astra 2.2 16v Z22SE.
The engine will be rebuilt in summer, making the following modifications
Elimination of balancing shafts
Carrying and polishing the cylinder head ducts
CR increase to 10.5 or 11: 1
2.4 inlet manifolds
Exhaust line in 55 mm
With that I want to reach 170 hp less ... will it be possible?
Thank you very much!