This circuit utilizes a microprocessor to track and control the position of both
cams by continuously pulsing the VANOS solenoids. Typical accuracy is within 1
degree of the cam setpoint. Full translation of the cam from 0 to 20 degrees takes
less than 1 second at most rpm’s. The DISA valve is also controlled for optimum
low and high rpm operation.
This circuit was designed to work in conjunction with the 413 ECU on an M54 engine
but can easily be configured to any standalone system . It utilizes the factory
VANOS signal to only adjust cam timing when the 413 calls for it, therefore ensuring
optimum cold start and part throttle operation.
This circuit is designed to mount in close proximity to the ECU but has provisions
for a cabin LCD to monitor real-time cam position, as well as DISA status and RPM.
This product incorporates the results of many hours of dyno testing to maintain optimum
cam position at both full and part-throttle. It has run in my personal car for 18
months and 16,000 miles without error. This board is now the third revision with
reliable surface mount technology.
S54 dual VANOS control is also possible but has not been developed.