What is the heat range of Autolite 3926?
5 heat range
I’m looking for a plug with all the dimensions of this one but in a 5 heat range.
What happens if spark plugs are too cold?
If the tip temperature is lower than 500°C, the insulator area surrounding the center electrode will not be hot enough to burn off carbon and combustion chamber deposits. These accumulated deposits can result in spark plug fouling leading to misfire.
Are Autolite plugs Made in USA?
FYI: Autolite spark plug manufacturing moved to China | The H.A.M.B.
What happens if I use a hotter spark plug?
What Happens If I Use A Hotter Spark Plug? The spark plug may overheat if it is above 1560F, which may cause the ceramic around the center electrode to blister and melt, resulting in pre-ignition and detonation. This can result in engine damage and pre-ignition.
What happens if you run too hot of a spark plug?
Overheating will cause the electrodes to wear quickly and can lead to pre-ignition. Pre-ignition occurs when the air-fuel mixture is ignited by a hot object/area in the combustion chamber before the timed spark event occurs.
Which autolite plug is hotter?
Autolite indicates the heat range with the last digit of the part number. For example, 3923 has a heat range of 3. The higher the number, the hotter the plug. The lower the number, the colder the plug.
What is the heat range of Autolite spark plugs?
Within the Autolite family, this particular plug is toward the hotter side of the range that runs (cold-to-hot) 3922 – 3923 – 3924 – 3926. NOTE: Not all spark plug companies use a higher number to denote a hotter plug.
Which is better NGK or autolite?
The quality of ngk is better, but I have one car that just likes autolites better, same gap & heat range. Car runs better with the autolites and the ngk will start to slowly load up.
What heat range is Autolite 3923?
For example, 3923 has a heat range of 3. The higher the number, the hotter the plug. The lower the number, the colder the plug.
Will a hotter spark plug stop fouling?
Rich air/fuel ratios require a hotter plug to prevent fouling. Mixtures that cause the plugs to read lean might contribute to preignition or detonation.
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 autolite good plugs?
5.0 out of 5 stars Good plug. My plugs were in a really bad shape. I put this set in to my 2002 VUE and now it idles better and engine feels smoother. So far very happy with the plug.
How do I choose a heat range plug?
When should I run my spark plugs colder?
Cold spark plugs are good for high RPM engines and other situations where the engine operates at a high temperature. Because they transfer heat faster, cold spark plugs can get dirty and become fouled sooner because they don’t get hot enough to burn off carbon deposits.
What is the range for Autolite spark plugs?
Within the Autolite family, this particular plug is toward the hotter side of the range that runs (cold-to-hot) 3922 – 3923 – 3924 – 3926. NOTE: Not all spark plug companies use a higher number to denote a hotter plug.
Are Autolite ar3923 plugs any good?
That’s a pretty hot plug. I’ve been running Autolite AR3923 plugs for the past 7 years. Really great plug. I would address the rich condition by some means other than a hot plug (if possible).
Do I need a 3924 or 3924 heat plug?
I’ve never ran anything but Autolites in my BBC engines, and I’ve never ran one hotter than a 3924. Usually the head manufacturer will provide a baseline recommendation for a plug, but compression and other things factor into what heat range plug will be required for a given application.
What is the best heat range for my engine?
The key to a heat range selection is related to selecting a plug that will efficiently burn-off carbon deposits from the center ceramic during normal use of the engine. So for a normal, street-driven engine, that 3924 recommendation is a great place to start.