Our BMW performance tuners have 75+ years of experience in performance tuning, auto restoration, racing, aerospace engineering, aircraft maintenance and a lengthy affiliation with the BMW Car Club of America.  It is with this breadth of knowledge and experience that you can entrust us to performance tune your BMW.  Ultimately, this tuning is accomplished without compromising the factory warranty and raising your car’s performance to the level inherent only in the most exotic sports cars in the world.    From an engineering point of view, let’s share our philosophy on basic technical principals that apply when optimizing the design of a component/machine.  The first and most important principal is the understanding that individual components of a system do not act alone but rather operate as part of an integrated assembly.  Often we see customers that have gone the catalogue route mixing and matching a multitude of products only to find that the expected performance gain is not there and in some instances has actually caused performance degradation.  A systems approach to engineering is the “only” way to enhance performance since it provides for integration of mechanical systems and often does this with software as well.  It is with this basic principal that DINAN performance tunes your BMW.    Performance tuning can be broken down into the following four basic categories:  engine, chassis, driveline and brakes.   Engine tuning in theory is actually quite simple.  Imagine for the moment that an engine is an air pump much like the human heart is a fluid pump.  An engine’s ability to aspirate air ultimately determines how much output in terms of torque and horsepower can be produced.  This pumping ability is quantified by an engineering metric commonly referred to as volumetric efficiency.  There are many variables that impact this pumping ability and it is with these variables that DINAN and UMW can have the greatest performance impact.  Going back to the air pump analogy an engine has an intake and exhaust system.  If you think of these systems as being overly restrictive, analogous to a human sucking through a straw, then you have the fundamental understanding of what is necessary to enhance engine performance.   First, we analyze the intake system.  The Intake consists of a restrictive air box, followed by an airflow meter through a device called a throttle body and finally through the intake manifold.   The air box is designed to dampen intake noise while at the same time aspirating hot engine compartment air.  DINAN cold air intakes eliminate the intake of hot air by relocating the air intake in a cold zone within the front end of the car while at the same time substantially enlarging the air tract thus making it les restrictive.  In addition in some applications DINAN relocates the intake air temperature sensor thus allowing the engine management system to recognize the colder denser air being aspirated.  This also translates into greater performance.   The airflow meter (AFM) is the second component in the intake system and is simply a device that measures airflow.  The airflow meter provides a signal to the engine ECU thus quantifying total mass flow rate.  The factory AFM is small in diameter and as such is also restrictive.  DINAN designs its AFM to enable much larger quantities of air to be aspirated.   The next device in the intake tract of an engine is the throttle body.  This device is nothing more than an air valve that is activated by depressing the accelerator.  Again the factory Throttle body is often restrictive, thus reducing total airflow.  The DINAN throttle body is precision machined to enlarge this restrictive aspect of the induction system.   The intake manifold is the last portion of the engine induction system and has the job of taking the upstream air and distributing it to each of the individual cylinders.  For many applications DINAN offers custom intake manifolds that optimize airflow and fuel distribution thus further optimizing airflow and also improving overall power and torque delivery of the engine.  All of the above components make up what is referred to as an aspirated induction system.  DINAN also offers the ultimate in performance by introducing supercharged induction systems.  In short, superchargers were developed by the Aviation industry to enable high altitude flight.  The basis for a supercharger is that rather than the engine having to suck air through an intake system, it now is forced by virtue of a belt driven blower/air pump.  The supercharger offers huge levels of performance improvement, often increasing horsepower by as much as 150-200 horsepower.   The next aspect of engine performance is the exhaust system.  The exhaust has the job of both dampening noise while at the same time carrying spent fuel/air out of the engine.  DINAN takes a very unique approach to designing high flow exhaust systems that goes beyond most other manufacturers of performance exhaust systems.  This approach not only considers enhanced performance but also noise level.  Noise often translates into cabin resonance for the passenger that substantially compromises the civility of what is meant to be one of the premier luxury cars.   The last discussion point and one of the premier skills of DINAN is its software design.  It is no coincidence that DINAN resides in Silicon Valley, the home of software design.  The DINAN software essentially takes the benefits of improved engine volumetric efficiency (i.e. ability to aspirate more air) and couples the aforementioned systems approach to engineering by tailoring software that enables the engine management systems to compensate for greater airflow.  This is accomplished by remapping the fuel system to allow fuel injector signaling improvements by increasing injector pulse width and duration, thus adding more fuel to the engine. The software improves the spark timing by initiating the spark earlier which allows the burning of more fuel and air, and also remapping of the valve timing thus also opening valves earlier for a larger gulp of fuel and air.  In short this translates to significant increases in horsepower and torque delivery.  In summary, these DINAN modifications provide these significant performance improvements without compromising fuel economy.   As stated previously, this is accomplished by improving overall engine system efficiency.  The only exception to this is, of course, if one is at or near wide-open throttle, in which case who cares???