Bmw Intake Camshaft

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Bmw Intake Camshaft
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From a technical point of view, throttle response can be measured by how fast your engine can build vacuum in its intake manifold, via throttle pressure. The faster and higher peak vacuum is reached in the intake manifold, the higher the pressure differential will be between outside air, and your engine. This pressure differential forces the air to flow from the area of high pressure (outside air) to the area of low pressure (the engine and cylinders), and the higher the pressure difference, the greater the pressure force, and the faster the air flow into the engine.

This is essentially how throttle response works. To improve throttle response several engine alterations can be used to achieve a higher peak vacuum in the engine or a faster change in vacuum per throttle input... some of these include:

1- Using undersized intake pipes and intake plenum runners to increase the airflow velocity in the intake system, making the engine able to suck all the air out of it faster and create vacuum sooner.

2- Adjusting intake cam timing to open the intake valve as peak vacuum is created inside the cylinder near bottom dead center.

3- Reducing the overall intake system volume, by using smaller manifolds, less vacuum lines, and more electrically operated (rather than vacuum operated) engine auxiliaries which means the engine has less air volume to clear from the intake system to create a vacuum in the manifold to force new air in. 

4- Using cam separation and cam overlap (when both intake and exhaust valves are open at the same time) to have the previous cycle's exhaust gasses help pull in fresh intake gasses for the beginning of this combustion cycle.

One interesting application of this concept is the G-Power supercharger kit for the BMW M3. The ASA supercharger powered kit focuses on response and efficiency rather than on astonishing peak power figures. The G-Power kit utilizes a very conservative boost supercharger by ASA giving a peak of only 4.4 psi of boost. Since the engine already very highly powered at 420hp, the addition of just 4.4psi of boost results in well over 500hp (as a conservative estimate) and as much as 560hp as a result of this combination. 

The focus of the G-Power kit is not just power figures, as rather than just providing a supercharger kit for the M3, G-Power has designed a completely new intake manifold for the M3. The manifold although has higher volume than the original M3 manifold (for more peak power as this is now a supercharged car), does have a narrow profile that promotes high air velocities to improve throttle response. Furthermore, the new manifold has integrated individual runners for each cylinders complete with trumpet style inlets raised from the floor of the plenum, which has been proven through fluid flow simulation to reduce boundary pressure differentials, reduce the pressure drop inside the intake manifold, and promote higher air velocities that lend themselves to higher peak vacuums and faster vacuum buildup inside the manifold. 

Even though centrifugal superchargers typically show a linear boost curve with engine rpm, and thus produce little to now power gain in lower rpms, the combination of this supercharger with the redesigned intake manifold and new tune reportedly provides over 20% increase in torque at ALL engine rpms, and with increased response. 

Here it is in G-Power's own words:

Air duct: Sport air filter system, CAD-FEM flow optimized boost recooling system consisting of an air duct made from aluminum cast, high capacity air-to-air intercooler made from aluminum cast in the car's front and a large volume air box made from aluminum cast, including 8 integral resonance induction pipes made from light polyamide, ensuring an optimal throttle response and a perfect torque curve; pneumatic controlled, engine load related boost control; boost level approx. 4 psi rel.   

The G-Power kit comes in 3 power ranges corresponding to 4, 6 and 7psi of boost. The 7psi kit with their full titanium exhaust is capable of peaking out over 580 hp with great response to match. Last but not least, the new G-Powered M3 is capable of doing a 0-124 mph 2 seconds faster than a factory M3, which at those speeds is about 20 car lengths of distance between the two cars. Moreover the G-Power with its unlimited speedometer will keep pulling all the way up to 223mph!

I am a master electrical engineer who has been Interested in cars and performance modifications for the last 13 years. I have moderated one import performance website for 3 years. I have turbocharged one car, highly modified a twin turbo monster, and have a lot of gained 'experience' on my friend's cars. My current vehicle is a 2005 Mercedes C200 Kompressor which is supercharged and modified.

Find out more about supercharger performance by visiting:
My blog: http://www.superchargerperformance.com

Introduction of the R 1200 Rt

 

Sport touring and touring bikes provide impressive performance with increased power and reduced weight. The R 1200 RT exhibits excellent handling and ride comfort. The design of model is characterized by clean lines and striking surfaces. In the R 1200 RT, the body fairing is subdivided into separate areas and occupies different levels. This visually highlights the already light feel of the motorcycle. Together with the electrically adjustable windshield, the fairing provides protection from wind and weather.

The RT series arrived in 2005 with the introduction of the R 1200 RT, which continues into the 2007 model year with color and other changes. The design of this model is completely different from the R 1150 RT with a 15% boost in power, 20 kg (44 lb) weight saving, optional electronically adjustable suspension and on-board computer. The servo powered ABS brakes on the 2005 and 2006 models are partially integrated such that the rear brake pedal only applies the rear brake while the front brake lever applies both brakes.

The new R1200RT takes the concept further with more power, less weight, and more comfort and safety features.

The new balance-shaft-equipped Boxer engine delivers a smooth 110 horsepower through a slick 6-speed gearbox. The standard anti-lock braking system is the BMW's Integral Generation II with automatic brake force distribution. The foot lever operates the rear brake only, as desired by many enthusiast riders. Every bike also is equipped with heated handgrips, and electrically-adjusted windshield, and adjustable rider seat height. An optional Electronic Suspension Adjustment system (ESA) sets the suspension for load and road conditions at the touch of a button. Electronic cruise control, heated seats, a sound system and more are available. Yet, this full-featured touring bike has a basic dry weight of only 504 pounds! The R1200RT is superbly set up for long-distance touring without sacrificing riding enjoyment.

Engine & Performance

1.Type - Air/oil-cooled 2-cylinder 4-stroke Boxer engine, one camshaft and four valves per cylinder, central compensation shaft.

2. Mixture control / engine management — Electronic intake pipe injection/digital engine management: BMW engine management, BMS-K with overrun fuel cut-off, dual ignition

3. Emission control — Closed-loop 3-way.

4. Maximum speed — Greater than 125 mph (200 km/h)

5. Fuel consumption over a 62 mile course at a constant 56 mph (90 km/h) - 65 mpg.

6. Fuel consumption over a 62 mile course at a constant 75 mph (121 km/h) - 49 mpg.

7. Fuel type — Unleaded premium, octane number 98 (RON) with automatic knock control

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2000 740IL BMW Check engine lite on now!?

Code I am receiving is PO011 or P0011 description of possible causes for code... camshaft position(CMP), intake/left/front, bank1- timing over advanced/system performance. Valve timing, engine mechanical fault, CMP, actuator, wiring.I have had the mass air flow sensor changed, both upstream and downstream O2 sensors, Intake gaskets, valve cover, spark plugs,throttle gasket, fuel pump and fuel filter done. Car has been stuttering under 40 mph and 2 rpms, and hesitating. Now my question is has anyone ever had to get this fixed before and can you tell me what it means or whats most likely to be the problem. Thanks for all your help.

Since the fault was read by a regular OBD code reader, you can not distinguish if it refers to a bad cam sensor or a bad VVT (variable valve timing). But you have to start somewhere. And a cam sensor is cheaper and easier to put in than diagnosing and replacing a Vanos-type VVT system.
Bank 1 is the right cylinder bank from the perspective of the driver.
And the cam sensor is in front of the engine.
After replacement clear faults and roadtest. If there are still other faults
then they need further diagnosis. If the same faults come back, then you need an expert BMW technician (not a wannabe) to look at the vanos (solenoid & oil supply, gears/sprockets, chains and chain tensioners/guides, etc.)
Good luck.

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