Comments on: Motor Trend: The Technology of the BMW 5 Series Gran Turismo http://www.bmwblog.com/2009/09/25/motor-trend-the-technology-of-the-bmw-5-series-gran-turismo/ BMW News, Reviews, Test Drives, Photos And Videos Mon, 13 Feb 2012 22:15:11 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: aa http://www.bmwblog.com/2009/09/25/motor-trend-the-technology-of-the-bmw-5-series-gran-turismo/#comment-157244 aa Wed, 07 Oct 2009 15:20:15 +0000 http://www.bmwblog.com/?p=21316#comment-157244 Atr_hugo, the old 760i was the first that implemented valvetronic and direct injection. Atr_hugo, the old 760i was the first that implemented valvetronic and direct injection.

]]> By: atr_hugo http://www.bmwblog.com/2009/09/25/motor-trend-the-technology-of-the-bmw-5-series-gran-turismo/#comment-155133 atr_hugo Sat, 26 Sep 2009 20:52:24 +0000 http://www.bmwblog.com/?p=21316#comment-155133 A straight six fires all cylinders once every 720 degrees of crank rotation. The individual turbos in the old engine received an exhaust pulse every 240 degrees of rotation, the twin-scroll (single turbo) of the new engine gets an exhaust pulse every 120 degrees of rotation. I suspect that is what resulted in peak torque occurring at 1200 rpm (on the new N55B30) rather than the 1300 rpm of the previous engine (the N54B30). This may be the first couping of variable lift valves and direct fuel injection. There's a lot of kit stuffed into the cylinder heads, dual Vanos, Valvetronic (variable valve lift tech), direct fuel injection, and the spark plugs. A straight six fires all cylinders once every 720 degrees of crank rotation. The individual turbos in the old engine received an exhaust pulse every 240 degrees of rotation, the twin-scroll (single turbo) of the new engine gets an exhaust pulse every 120 degrees of rotation. I suspect that is what resulted in peak torque occurring at 1200 rpm (on the new N55B30) rather than the 1300 rpm of the previous engine (the N54B30).

This may be the first couping of variable lift valves and direct fuel injection. There’s a lot of kit stuffed into the cylinder heads, dual Vanos, Valvetronic (variable valve lift tech), direct fuel injection, and the spark plugs.

]]> By: L. Hamilton http://www.bmwblog.com/2009/09/25/motor-trend-the-technology-of-the-bmw-5-series-gran-turismo/#comment-154972 L. Hamilton Sat, 26 Sep 2009 00:52:04 +0000 http://www.bmwblog.com/?p=21316#comment-154972 waooooo!!!! waooooo!!!!

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