The large displacement of the 3900 V-6 – achieved with 99-mm offset bores and an 84-mm stroke – combines with torque-enhancing technologies such as active air intake to produce a broad, flat torque curve that translates into exceptional all-around performance and terrific off-the-line launch feel. With active air intake, air entering the engine is continuously tuned through a valve in the intake manifold to deliver optimized low-, mid-range and high-rpm torque. In fact, 90 percent of peak torque is available from 1800 to 5800 rpm.

Variable valve timing is used to bolster performance, enhance economy and reduce emissions. An electronically controlled cam phaser provides for infinitely variable adjustment of camshaft timing in relation to the crankshaft. By electronically controlling the camshaft, the optimum location can be selected for various engine operating conditions, maximizing torque and horsepower outputs. The 3.9L V-6 is the first production cam-in-block engine to incorporate cam phasing.

The M800 is our flagship Engine Controller. It is capable of 8 High Flow injectors in sequential mode operation like the M48. It has 8 auxiliary outputs, 10 auxiliary Inputs and 1Mb of logging memory. Unused Ignition or injector drives may be used for additional output features. M800 offers 2 Lambda inputs which allow control of the Air Fuel Ratio Bank to Bank. The M800 is the first ECU in the industry offering the fully variable cam control option and Drive by Wire. Twin Turbocharged Big Block Chevrolets have produced over 3300 Horsepower using the M800 for precise fuel delivery. Advanced Functions are standard and include Traction Control, Anti-lag, Gear Change cut and High Low Injection.
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Fully Variable Camshaft Timing - MoTeC is proud to be the industry leader in the aftermarket for controlling engines with fully variable camshafts. We have several special modes written to allow full control of up to 4 fully variable camshafts per engine such as the Dual Vanos BMW V8 using our M800/880 series of Engine Management Systems. Special Ref/Sync modes were written to allow the tuner to use the stock trigger wheels and sensors. Camshaft timing can be independently adjusted for each cam in 1/2 degree increments based on RPM and Load. With full adjustment of camshaft opening and closing points, the engine's volumetric efficiency curve can be stretched providing optimum cylinder filling over a much wider range of RPM, increasing the average horsepower and ultimately making the car faster.