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 FeedsLebanon Valley Dragway hosted Wind In The Valley. This new event was designed to bring more heads-up racing to the Northeast region.
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Jack Beckman will be running a legendary John Force paint scheme at the U.S. Nationals. This scheme honors Force's 1996 championship season.
The NHRA has unveiled the 20-race, 2027 Mission Foods Drag Racing Series schedule, featuring a return to the traditional West coast openers.
Joel Grannas' new "Peeled" Mustang is one bad ride. The 2JZ-powered Ford reset the H-pattern world record with a 6.490 pass.
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The rumors of Darana Motorsports Holdings tracks closing continue to swirl. We spoke to management at several tracks and got the truth.
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Recent Technical Articles
John Force?s Crash Inspired A Reusable Funny Car Rescue Training Chassis
John Force's 2024 crash has led to numerous safety improvements for Funny Cars. Tim Fabrisi developed a training rig for first responders.
NewsSource Yesterday, 09:50 AM