![]() ![]() The system uses a gear on the Vanos actuator and a gear on the camshaft. The Vanos system uses oil pressure to control the position of the intake and exhaust camshafts. It isn't revolutionary, if you've ever heard a Honda bro ( hilarious youtube video) yell "VTEEEEC", he is talking about the same technology as Vanos. The VANOS system is BMW's technology that allows for variable valve timing. The end result is a smoother power bank, torque on the low end without comprising power on the high end, and overall just better driveability, smoother idling, etc. Variable valve timing allows for timing adjustments to be made electronically and automatically, instead of manually by hand like they had to do back in the day. Variable valve timing is the solution to this problem, and just about every manufacturer has their own technology for it. So tuners would frequently upgrade their crankshaft to provide the performance they are looking for, on the street or on the track. Because of this, you were limited to either low end torque or high end power, but it was very difficult to design a crankshaft that provided both. The crankshaft was responsible for spinning gears which spins the cams which controls timing. In early model BMW's, such as our favorite E30 M3, engine timing adjustments had to be done by hand with a special tool.
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