Well, I Can Tell You Where NOT To Have Your Evo Dyno-Tested
by Jack Baruth
December 12th, 2010 8:09 PM
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I’ve worked a few places where cars are tested on various types of dynos, and without exception, the cars are always “four-corner tied” to prevent both front-to-back and side-to-side motion. Do you want to know why? Watch the video.
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Some states require vehicle hold downs be installed "X" -like across both the front and rear. If they aren't, you sit there on the side of the road until they are. They define "vehicle" as anything on wheels. This includes air compressors, generators, and garden tractors. Well, maybe they got it right after all.
Sadly, this kinda thing is the norm with these shops rather than the exception. It seems the only prerequisite to running one is that you have the ability to bolt parts on when they come with instructions. Professionalism, common sense, and in this case knowledge of basic physics is quite rare at a tuning shop.
This is one of my recurring nightmare themes -- car falling off a lift (though engine not running). Usually involves my dearly departed Volvo 240 for some reason... Another theme is losing lots of small parts on the ground.
Who could have foreseen an AWD car pivoting around a (somewhat) fixed point? Insert active handling gag here. I believe the dyno testing at the local motorcycle shop involves a guy straddling the bike and squeezing the front brake lever. I'll have to look closer for straps next time I'm there.