Cool article but read about the spark plugs. I think they got something a little wrong.
"Cool facts—The basic construction of a spark plug is fairly simple—essentially an insulated
electrode—but it withstands tremendous heat and pressure. With the engine turning at only
1000 rpm, each spark plug fires its jolt of electricity 250 times per minute. And if you’re on the
highway, with the engine humming at 2500 rpm, each plug fires 625 times per minute! That’s
2,500 spark events per minute in a four-cylinder engine and 5,000 in a V-8. That’s a lot of little
lightning bolts!"
2500RPM, spark plug fires every other revolution so each plug fires 1250 times per minute not 625 as this TECH article says.
