VVT and Cam Phasing
Thread Starter
Racer
Joined: Oct 1999
Posts: 330
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From: San Diego CA
VVT and Cam Phasing
Looks like GM is putting some new technology into in V-6 OHV engine. I wonder if the LS2/LS7 could/would be enhanced with this technology.
"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 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."
