Well I came up with the The number of turns head thread Test.
Basically there is a seat in the head for the wider portion of the plugs just above the threads to stop on. This seat, notch, ledge, whatever... read more

Mustang Feeds"Disco Dean Karns will debut a new-to-him Pro Modified 1969 Chevelle in his signature pink color at this weekend's IHRA season opener.
FuelTech officially sponsors the 2026 Motorsport UK British Drag Racing Championship. This partnership elevates the Pro Modified class.
More...
Arizona native Dylan Winefsky tackles the NHRA Arizona Nationals. He pilots the Nitro Moose Funny Car in scorching desert heat.
More...
Top Fuel driver Travis Shumake steps into a Nostalgia Funny Car. This historic hometown race honors his father at the Arizona Nationals.
The Right Trailers Outlaw Street Series officially debuts at zMAX Dragway. This crossover brings television racing icons to the NHRA stage.
Recent Technical Articles
Intercomp Introduces Billet Wireless Scale System With Mobile Data Integration
Intercomp has added another great scale system to its lineup. The SW700 XBT is packed with features that any racer needs in their scales.
NewsSource Today, 07:10 AM