By Rob Sabbadin:
A commonly asked question by people is whether cam gears on an engine are actually beneficial or a waist of money.
Our R&D will show that cam gears can be very beneficial. Every engine has its own characteristics and different cam timings can vary between engines and the application. Also, turbo size and other bits and pieces can make a big difference to the required cam timing.
Cam gears are generally 1 degree or 2 degree adjustable. Either being 1 degree on the cam, or 2 degrees on the crank.
Advancing and retarding cams can give you more power down low, or up top, or it can also give you a midrange power gain.
The power gain that is needed with vary for the application of the engine. Whether it was someone that was trying to be a horsepower hero, trying to get power at the top of the rev range and not really worry about the bottom half. Or whether a customer wanted midrange and top end, or bottom end power, and not really worry about the top end.
As you can see from the results, cam timing has given us a very good increase. It has basically given us an increase from the get-go, all the way to the top of the power curve. With this we have used exactly the same turbo charger boost, also, we have tried to maintain the same air fuel ratios.
When cam timing is changed, it does alter air fuel ratios, but we have made changes to make sure that was the same, and also ignition timing has been left the same.
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