What heat range is Autolite 3924?
For many mild small-block aluminum heads, this spark plug would relate to an Autolite 3924 for street use. Within the Autolite family, this particular plug is toward the hotter side of the range that runs (cold-to-hot) 3922 – 3923 – 3924 – 3926.
Are Autolite double platinum spark plug gap?
Autolite Double Platinum Spark Plugs feature platinum-to-platinum firing which virtually eliminates gap erosion, reduces misfires, and provides improved durability.
What heat range spark plug should I use?
The heat range must be carefully selected for proper spark plug thermal performance. If the heat range is not optimal, then serious trouble can be the result. The optimal firing end temperature is approximately 500°C (932°F) to 800°C (1472°F).
How do I choose a heat range spark plug?
According to Champion Spark Plugs, for normally aspirated, gasoline-fueled engines, a good rule of thumb is to go about one heat range colder for each full point in compression ratio increase from 9:1 through about 12.5:1, and two heat ranges colder for each point increase between 12.5:1 and 14.5:1.
Are double platinum spark plugs good?
It yields decent longevity but ranks the poorest in performance. Platinum spark plugs are also recommended for cars with an electronic distributor ignition system, while double platinum spark plugs best fit vehicles with a waste spark distributor ignition system.
What are the benefits of Autolite spark plugs?
Autolite Copper Core plugs are your industry standard. Provides a center wire platinum firing tip. Benefits include: reduced gap erosion, fewer misfires, better performance and more durability. Guaranteed for four years.
When was the first Autolite spark plug made?
Autolite Copper Core plugs are your industry standard. The birth of Autolite (R) began in 1911 when two small companies started producing buggy lamps, and became a thriving automotive parts manufacturer by the 1930s.
What makes a copper spark plug gas tight?
The copper-glass seal bonds insulator and terminal post center electrode together to ensure full required voltage at spark gap, creating a gas-tight seal that is 100 percent leak-proof. Copper Core spark plugs feature a cold-formed steel shell and precision rolled threads, and a one-piece terminal post that adds strength.