Modular Roller Tappets Development and Testing

Then we designed camshafts with a card tappet, Benny drilled a hole and mounted it on the shaft , because no one could grind a camshaft with a narrow cam. Benny measured the degrees on the turntable and adjusted everything. It could only accept a pushrod with a diameter of half an inch. If you take a tappet from a card with a diameter of an inch and grind it down to half an inch, it will start to cut into the camshaft. So they came up with the roller pusher. Ahem. And it has roller pushers. Wow, so you had to make those too? Yes. This is incredible. Then I put it on a go-kart with a roller pusher and drove it at full power for two hours—it did n't wear out at all, and of course, after all our tests, it shows great results. This is really interesting. So you used a real kart engine for development to make sure your parts were reliable before installing them on... you only did the pushrod? A. That's all I used the kart motor for. Because I wanted to run it and make sure it worked before