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Air Filters
BMC CDA Kits - click here to buy online!
BMC Replacement Filters - click here to buy online!
BMC F1 Results
FIA F.1 CHAMPIONSHIP FORMULA 1 HUNGARIAN GP 2010 01/08/2010 BMC's RESULTS:
2° BMC 4° BMC 6° BMC 7° BMC 8° BMC 9° BMC 10° BMC
Air filters are clearly essential for engine life. Properly fitted they will improve power by ensuring a good supply of clean, cold air. There is a lot of hype about filters improving power. Some certainly do but only when they improve upon the existing set up. Fitting a cone type filter such as a K and N 57i or BMC VAS may well improve flow, and possibly throttle response but if the filter then draws hot air from the engine it will not improve power. In fact it could well reduce power. The same applies for airbox drilling.
We have read of lot of information on filters over the years. We personally feel cotton gauze are the best ONCE they have had time to develop a layer of dirt to increase filtration efficiency. In terms of flow we feel they are superior. However in terms of dirt filtration we were surprised to read the results of this test which showed that foam were much better in multilayer style than cotton gauze for filtration efficiency alone.
http://www.ducatigarage.netfirms.com/filtertest.html - to read the full test
IN BRIEF from an airflow perspective
Bronze Medal
As you would expect, the paper element finished third It captured around 120 grams of dirt over an 11 minute run before the filter became clogged and registered the pressure differential drop on a manometer of 6 inches of water.
The starting reading was 17.84 inches of water, and the ending differential was 23.84 inches of water.
Silver Medal
The RamAir (similar to Pipercross) multi-stage foam filter finished first in dirt holding holding capacity. It captured a massive 199.81 grams of dirt but with a larger starting and ending pressure differential. This means the foam filter works well out the box but less well with a layer of dirt.
Gold Medal
The K&N cotton gauze filter (BMC air filters and Green also use cotton gauze) finished second in terms of filter effciency with it capturing 140.08 grams of dirt over a 22.8 minute run before the filter clogged up and registered the pressure differential change of 6 inches of water. HOWEVER the start pressure drop was just 16.8 inches of water making this the all round filter. The starting differential pressure was 16.80 inches of water and the ending pressure differential was 22.80 inches of water.
Balance Motorsport can offer the superb range of BMC Filters including the Carbon Dynamic Airbox. This device ensures a supply of cold air to the filter and using a venturi effect and front air intake actually increases the velocity and volume of air being drawn into the engine.
If the airbox is not listed for your vehicle we can either custom design and install a setup for you or if you are too far away you can order a range of pipes and clamps that should enable you to install a CDA on any vehicle. We still offer cone filters from BMC, K&N and Green but remember with these to focus on getting a good cold air feed.
In addition have a look at our Heat Management products. If you can reduce underbonnet temperatures then you can probably increase power.
More information on BMC Filters
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BMC was founded in 1973 and until 1991 was essentially a motorcycle accessories distributor. Since 1991 BMC started also distributing technical products for cars: some of their first customers were Cosworth and Ferrari.
In 1995 BMC started producing their own air filters due to an inquiry of F1 air filters from Ferrari Team.
From producing race air filters starting the manufacture of air filters for production cars was easy. Now BMC range includes panel sport air filters, conical air filters, direct induction kits and the Carbon Dynamic Airbox.
BMC air filters are designed and produced by Italian Engineers to be used in extreme conditions and to give you the highest performance.
Since 1996 BMC air filters have equipped some of the most important Teams in F1 and American Le Mans Series like Ferrari, Toyota, Williams BMW, Prost, Sauber, Minardi, Porsche and Audi, thus demonstrating the high quality level of the product Pictured below is a twin CDA intake on a Ferrari

Pictured below is a cutaway diagram of the Carbon Dynamic Airbox and also a view of the airbox 
K&N Airfilters
K&N 57i Air Induction Kits - we think it's worth bearing in mind with these kits that if you are drawing hot air from under the bonnet you will lose power compared to a well designed enclosed cold air feed.
K&N High Performance Air Filters - again bear in mind with any panel filter - the engine needs their to be a restriction in the air flow path for these products to increase performance. Many modern engines have such well designed filters that the chief advantage of a washable filter is cost saving on paper filters in the long run. Remember the test results above show paper filters best when new so in the long run it costs more but may make your engine last longer.
K&N Apollo CIS (Cold Air Intake System) Universal Induction Kit - it's taken some time however this is K&N's first offering of an enclosed intake and the best option if you are looking for a filter to extract more power compared to a poor OE design.
- Outside shell reduces heat build-up allowing cooler air to your engine, resulting in improved efficiency & increased power gains
- Designed to increase horsepower and acceleration
- Contains a K&N washable and reusable K&N air filter.
- Ideal for normally aspired engines up to 250BHP and turbo engines up to 350BHP

BMC CDA Kits click here to buy online!
BMC Replacement Filters - click here to buy online!
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