Are there any good alternatives to the original DP air filters?

Hi,

I have trouble getting my DP air filters to fit properly inside my CF air tubes. The filter itself seems to be too narrow to cover the whole width of the air tube.

Have any of you tried other types of air filters?

What if I install an air filter in the air box instead (either on top of the throttle intakes or like the Pipercross filter that runs between the air tube openings on the inside of the air box)?

Will that in any way "reduce" the engine breathing space and create adverse effects?

I think thre best stock alternative is the triangle shaped ones that go in the inlets to the airbox. I can't remember who sells them though.......anyone

(sportsbike.com.au ) in australia,,maybe jason can buy bulk and sell um to you guys

Short Answer

Filters are not performance equipment, they are protective equipment. You won’t find a filter that flows air better (and makes more power) than a clean stock filter. Unfortunately, the stock filter elements don’t seal very well to the air runner and don’t filter dirt from the air as well as aftermarket filters.

The best location for the filter is in the air runner, and best filter of this type is the Pipercross MPX038. The Pipercross filters are the same shape as the stock filters, but thicker. They even use the stock plastic frame to give rigidity. Thicker means they seal to the air runners better and hold more dirt. They also filter better since they use a coarse layer (similar to the stock unit in cell size) bonded to a smaller cell foam layer so they capture smaller dirt particles. They come supplied with filter oil. Most important, they don't mess-up your airbox resonance.

Filters located in the air box take-up space which changes the resonance of the intake system at various engine speeds. Air box resonance helps to fill the cylinders with air, and it’s important to note that factory engine development work to smooth-out the power and torque curves is done using the stock filters. In particular, air box filters degrade throttle response, the ability to smoothly accept changes in throttle, by reducing the volume of “free�air located in the space between the filter element and the throttle plate. The volume of “free� air should be at least 1.5 liters for the best throttle response for liter displacement bikes.

One type of air box filter is installed over the throttle body velocity stack. Some owners choose these to protect the engine from any dirt ingestion in the event of a crash that dislodges the fuel tank, or from a poorly sealed air box.

Peak power is essentially the same for both filter types.


Long Answer

http://ducatisportingclub.com/...12578

What bike is this for? Pipercross makes good replacement OEM style in-ram tube filters for the 748/916/996/998. $50/pair. Our dyno testing for in airbox filters says ITG JCS-79R (on sale $75) is best for 748/916/996, Pipercross MPX065 ($235) is best for 748R/998 with high injectors, Ducati stock filters are excellent in 749/999 bikes.

Thanks a lot for all your helpful advice, guys!

The air filters are to be installed on my 998R. I don't want to expose the engine to dirt and at the same time I don't want any loss of power or reduced engine response.

Can I have my cake and eat it too if I install filters over the throttle body velocity stacks or will that reduce the volume of free air to nothing?

For 998R, we recommend either the replacement Pipercross OEM style (and grease up the tank/airbox seal area) or the Pipercross MPX065.

The triangle ones are bmc and tuckerocky or lockhart sell them.

BMC




I saw some for sale on Ebay.

So... it's a tie between Pipercross MPX065 and BMC 40-0898 then. Am I right?

Is it just a question of price and personal preference or do any of you know if the one filter beats the other with respect to dirt blocking capacity and engine power/torque?

Thanks again, you Gurus! Truly grateful for your advice & input!

The ability of a filter to remove dirt from the air and its ability to allow air to pass-through unrestricted are opposite goals.

So any filter design is a compromise between filter efficiency and flow efficiency. An efficiency-flow balance is achieved when the filter element area is as large as practical. For a given filter material, the larger the flow area the less flow restriction. Increasing flow area is usually done by pleating the filter material to fit into the available space.

On a per-square-inch basis foam filters are less restrictive but less efficient filters than paper elements. However, foam element filter effectiveness is enhanced by applying oil to the element allowing trapping smaller particles than foam alone and longer intervals before clogging up.

Whatever filter you decide to use, KEEP IT CLEAN to maximize air flow and maintain the correct air-fuel mixture.

What is the best way to oil the filters (the inbox type that is)?

A recycled pump-spray bottle works well. The idea is use enough to coat the foam cell walls throughout the filter's thickness. Squeeze out any excess, but don't worry, the airflow will suck any oil caught in the cells into the engine to be burned anyway.