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 FeedsKyle Loftis and 1320Video changed motorsports media. Sadly, it has been announced that Kyle has passed away.
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Former road racer J.R. Osborne's ride is wild. He's partnered with FFRE to create a unique Coyote-powered Pro Mod Mustang.
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Ron Capps has earned another honor. Capps will be inducted into the Motorsports Hall of Fame of America Class as a part of the 2027 class.
Moser Engineering is making rearend upgrades easy. Moser Engineering is offering free assembly of its MusclePak rearneds in the month of may.
The last 365 days have been a wild ride for Jordan Vandergriff. We sat down with Vandergriff to learn a bit more about him.
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Recent Technical Articles
High Output Alternators: Solving Idle & RPM Limits
Master your charging system: calculate true idle amp draw, respect the 18,000 RPM limit, and ensure a perfect engine ground.
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