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 FeedsTop 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.
Mark Viso's 1969 Chevelle is a dream project car that's stood the test of time. The classic Chevy is powered by one nasty big block.
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Ryan Rudrick has grown up around racing. Rudrick now pilots his family's 1970 Duster in NHRA's Stock class at events across the country.
Nitro engines need a whole lot of fuel to make power. On this episode of Tech Inspection we learn about these pumps and how they work.
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Local Funny Car Star Dylan Winefsky Ready For NHRA Arizona Nationals
Arizona native Dylan Winefsky tackles the NHRA Arizona Nationals. He pilots the Nitro Moose Funny Car in scorching desert heat.
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