The Ok-Series is a normal dual-overhead-camshaft inline four-cylinder engine structure. Both the engine block and cylinder head are constituted of aluminum. Initially, the Ok-Series used customary multi-port gas injection, that means the gas injectors spray gas into the consumption manifold, and the valves management its entry into the combustion chamber. However, later variations of the Ok-series switched to direct injection, with the injectors spraying gas instantly into the combustion chamber. In addition, early Ok-series engines have been solely naturally aspirated. However, because the Ok-series lineage grew, compelled induction through a turbocharger got here from the manufacturing unit, relying on the mannequin.

The Ok-series combines Honda’s already noteworthy functionality to construct environment friendly, strong, and reliable engines with a timing chain that hardly ever wants servicing and robust rotating meeting parts. Because of this, it isn’t unusual to see Ok-series engines lasting effectively over the 200,000-mile mark. Honda additionally used these engines for racing, in order that they’re no strangers to abuse. This is why they turned such in style platforms for modification. Without any inside upgrades, Ok-series engines are identified to be able to over 400 horsepower with added compelled induction and correct tuning.

Of course, we will not carry up an iconic Honda engine with out mentioning VTEC. Ok-series engines use Honda’s i-VTEC system, which implements each variable valve timing and ranging camshaft profiles. This permits most effectivity throughout nearly each possible engine RPM.