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 FeedsSmall Tire Pro Stock racer David Theisen had his heart set on earning an NHRA Speed For All Wally in Indy, and he worked hard to pull it off.
Summit Motorsports Park is ready to host the IHRA World Finals. Bracket racers will now have a place to race thanks to Bill Bader.
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The PDRA hit Bristol Dragway for the Thunder Valley Throwdown. Here's a recap that covers all the action from Thunder Valley.
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The Southeast Gassers Association put on a show at Rockingham Dragway. See who brought home the wins at this huge double header.
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Tom Hoffman turns heads in his Mustang, and he is going to get even more looks as he hired Mike Szalay to give it a slick new paint job.
Recent Technical Articles
Beyond the Audio Wall: Drag Racing Has More Fans Than We Think
Drag racing is a sport filled with sound, but what if you can't hear? There's a huge section of fans that are deaf and could enjoy the sport.
NewsSource Today, 09:15 AM