Why Modern HEMI^® Engines Use 16 Spark Plugs Instead of 8

Modern HEMI^® engines like the 5.7L, 6.2L and 6.4L use 16 spark plugs – two per cylinder – not for show, but to solve a combustion challenge unique to their hemispherical chamber design. The wide chamber makes it harder for a single plug to ignite the air-fuel mix efficiently, so a second plug ensures a faster, more complete burn, resulting in better emissions, fuel economy and engine smoothness. While it adds maintenance, the payoff in performance and efficiency is clear. For the full breakdown on why Chrysler engineers doubled the spark plugs, check out the original article on Jalopnik.

Source: Chino Ortiz – Jalopnik.com | Photo Credit: Repair Tips & Tricks Only Mechanics Know – YouTube

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