R
Rampower2012
Guest
Why do the 5.7 have 16 spark plugs instead of 8 ???
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MRFREEZE57
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the 2 plugs per cylinder are for more efficient combustion, also help prevent detonation. years back when dad had his cessna 150 air plane, the aircraft engines have 2 magnetos and 2 plugs per cylinder. upon doing the mag test by shutting off 1 mag the rpm would drop around 50 rpm so it is more efficient especially on a bigger cylinder. the new Harley Davidsons also have 2 plugs per cylinder.
RVGuy
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"The use of a pair of spark plugs per cylinder effectively doubles the fire power (pun intended) of the ignition system, which is needed for a cleaner, more complete burn of the large air/fuel charge-particularly at higher RPM, as the valves open and close more rapidly. Without the twin-plug design, it would have been almost impossible to burn the mixture and clear the chambers sufficiently to meet fuel economy targets and federally mandated emissions guidelines. In fact, the system works so well, that the 5.7L Hemi delivers approximately 10 percent better fuel economy than the less powerful 5.9L V-8 it replaced in trucks and SUVs."
From an article in 2003
From an article in 2003
Flip-er
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Thank you for the lesson, great to learn things like this
