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 FeedsTony Stewart's comparison between Kevin Harvick and Leah Pruett is a big compliment. Pruett's ability to do more than drive is underrated.
Learn why wet sumps fail in motorsports and how dry sumps ensure survival. We break down pump stages, plumbing, and pressure.
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Brian Bednar's Oldsmobile Cutlass has transformed from family car to race car. Now the Olds is powered by a supercharged Gen III HEMI.
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The IHRA has named Dustin Farthing as its new president. Farthing has an extensive background in the motorsports industry.
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The Idle Air Control value is an important setting in an EFI system. Here's how to set the IAC for a Holley EFI system.
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Chaos Super Nationals Results: Funny Car Chaos And Nitro Chaos Invade Summit Motorspo
The Chaos Super Nationals put on a show at Summit Motorsports Park. Here's a recap of all all the chaos-filled action.
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