It should go without saying that correct rocker arm specs are something you want to get right the first time. But measuring a rocker arm isn’t as straightforward as you might think—there are a few key dimensions to check to ensure you’re ordering the best rocker arms for your engine and cylinder head application.
And to find out exactly what those rocker measurements are, we found this video from the valvetrain experts over at Scorpion Racing Products.
Given that they’ve been in the performance valvetrain game for decades, the Scorpion techs know exactly how to measure a rocker arm (stock or aftermarket), and they’ll show you how to do it too.
As an added bonus, this in-depth tech video will also show you how to calculate the rocker arm ratio—an especially handy technique if you’ve got a cylinder head filled with mystery rockers.
Again, this video really covers the topic in depth, running over eight minutes long, so it’s chock-full of valuable valvetrain information. If you spend much time working in or around cylinder heads, it’s definitely worth checking out:
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