Everyone knows that a well tuned engine will significantly improve vehicle performance. Spark plugs play a very significant role in the tuning process and DENSO has issued advice on how changing spark plugs can have a hugely positive impact on how an engine performs.

When considering engine tuning, aspects such as software, air intake or exhaust pipes are often some of the first things considered. However, Martin Pring, Manager of DENSO Aftermarket Sales says switching to a more technologically advanced spark plug is an important early option. He says, “To achieve the best results, including optimum fuel efficiency, you need to use technologically advanced spark plug. DENSO’s Iridium Power Spark Plug is the ideal choice.  These advanced spark plugs feature DENSO’s patented 0.4mm iridium centre electrode and U-groove, giving the spark enough room to grow, ensuring optimum combustion and in turn optimum performance.” 

Martin adds, “The low required voltage and a high ignitability guarantees a dramatic improvement in combustion, and ultimately an increase in engine output. A recent bench test using a motorcycle engine to demonstrate the improved combustion of Iridium Power with that of a normal plug, showed an improvement of 1.4% more horse power in output at 110 km/h.”

DENSO Iridium Power’s contribution to improved performance is particularly notable during acceleration. The 0.4mm diameter iridium centre electrode, coupled with the specially shaped U-groove ground electrode, combine to achieve higher ignitability, despite requiring a lower spark voltage than ever before. DENSO say this enables rapid fuel response with fewer misfires than under higher required voltage spark conditions, and fewer misfires when ignitability is difficult. As a result, the acceleration is significantly improved when compared to normal plug performance.

Martin makes the point that instead of focusing on air intake, exhaust pipes and software when tasked with improving the power output of a vehicle, technicians should start with installing different spark plugs. Not only is performance improved but so is fuel efficiency.