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 FeedsIt was a wild year for the Funny Car and Nitro CHAOS series. Here's a recap of how the title chases played out and who scored the wins.
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Weather Can?t Stop Swanfest Money In The Bank At Rockingham Dragway. Here's a recap of who scored wins at this no time party.
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The Midwest Nationals marked an important point in the NHRA Countdown. See who picked up wins in St. Louis this weekend.
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Two days after setting a new stick-shift world record at FL2K, Brett LaSala's "Snot rocket" Mustang lost a tear tire at over 200 mph.
Ron Capps returns to St. Louis chasing a win and points in the Countdown. Maddi Gordon debuts a historic NAPA Auto Parts Top Fuel scheme.
Recent Technical Articles
Chip King Breaks NHRA Pro Mod?s 5.50 Barrier At St. Louis
Pro Modified veteran Chip King topped a record-setting barrage at St. Louis, breaking the 5.50 barrier with a stunning 5.596-second run.
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