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Autolite 3924 Heat Range
Autolite 3924 Heat Range. So 4 is a notch or two colder than stock. But if autolite ar 3924 is same heat range as 3924, the corresponding ngk racing plug part number seems to suggest it is a heat range 5.

The 39 means they are 3/4 longer for aluminum heads. For example, 3923 has a heat range of 3. The higher the number, the hotter the plug.
Guaranteed To Deliver Quick Starts, Good Fuel Economy And Smooth Acceleration.
The higher the number, the hotter the plug. I have 2 cylinders that are very close to touching the primary tubes on this 383 sbc, does anyone make a header plug with the same heat range of. The 39 means they are 3/4 longer for aluminum heads.
The Plug Should Be Ok If They Are For Your Engine.
The cross references are for general reference only, please check for correct specifications and measurements for your application. There are 301 replacement spark plugs for autolite 3924. They do this because it gives the plug more thread to grip so you don't strip them in the.
Anyone Using Autolite 3926 In Your Big Blocks ?
Discussion starter · #1 · sep 1, 2006. A stock heat range plug would be a 5 or 6 (higher is hotter). I am running a 454 @ 10:1 cr, edelbrock.
A Switch In Heat Range.
Copper core center electrode for higher thermal conductivity. If the heat range is too cold, the deposits will not burn off the tip and the spark plug will foul. For example, 3923 has a heat range of 3.
Sometimes Using A Heat Range.
Autolite racing spark plugs are the preferred choice for many professionals. You should set your timing back to stock 10 degrees while running nitrous. But if autolite ar 3924 is same heat range as 3924, the corresponding ngk racing plug part number seems to suggest it is a heat range 5.
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