BMW 3-Series (E90 E92) Forum - View Single Post

BattleWagon · 03-21-2008, 07:03 PM

Finally found this thread. Will try to answer all the questions.

Why are the pleats perpendicular to the OEM ones?
In air flow tests, the OEM pleats displayed considerable harmonic vibrations at high RPMs and this created restriction to an already challenged air box due to physical underhood constraints. Not all filters require this change in orientation but this particular air box created conditions that benefited from this design. Not all filter designs require or benefit from this pleat orientation change, but this 335 box sure did!

How is this filter different from the competition?
The similarities are that they are all made of rubber cotton, mesh and oil. But how these ingredients are manipulated to create the final product is vastly different. The amounts of each ingredient differ in that we use almost twice as many plies of cotton as the competition. More cotton means more oil which means more filtration which contributes to air flow. Deeper pleats also is a variable in this equation as it is also a factor in retaining particulates at high RPMs. Unlike the OEM filter which uses a paper variant to stop the dirt (via tiny holes which is very restrictive), these filters use oil to trap and retain the dirt. The proprietary additives in the oil are responsible for the specific characteristics of each filter. At HP our goal is to create a filter that PROTECTS as well as it performs, not one or the other as compromise is not an option.

Is this the same Streamline filter that lit up M3Forum.net and catapulted Helene Performance into existence by providing a true custom tuned panel filter?

YES!

Why does this filter have less pleats then the competition?
We are tuning this filter to the stock air box in order to optimize the air flow for its configuration. Having said that, it is very likely that the production filters will have less pleat count then this prototype. Reducing pleat count will decrease dust loading capacity but it will easily go for 10k to 15k miles between cleanings (depending on local condtions).

How much will this cost
Pricing will be very competitive relative to current offerings. It will be inline with the current pricing levels of Streamline filters most likely.

03-21-2008, 07:03 PM	#21
BattleWagon 9 Rep 137 Posts Drives: E90 328i 6mt, 325iT 5mt Join Date: Oct 2007 Location: SoCal iTrader: (0)	Finally found this thread. Will try to answer all the questions. Why are the pleats perpendicular to the OEM ones? In air flow tests, the OEM pleats displayed considerable harmonic vibrations at high RPMs and this created restriction to an already challenged air box due to physical underhood constraints. Not all filters require this change in orientation but this particular air box created conditions that benefited from this design. Not all filter designs require or benefit from this pleat orientation change, but this 335 box sure did! How is this filter different from the competition? The similarities are that they are all made of rubber cotton, mesh and oil. But how these ingredients are manipulated to create the final product is vastly different. The amounts of each ingredient differ in that we use almost twice as many plies of cotton as the competition. More cotton means more oil which means more filtration which contributes to air flow. Deeper pleats also is a variable in this equation as it is also a factor in retaining particulates at high RPMs. Unlike the OEM filter which uses a paper variant to stop the dirt (via tiny holes which is very restrictive), these filters use oil to trap and retain the dirt. The proprietary additives in the oil are responsible for the specific characteristics of each filter. At HP our goal is to create a filter that PROTECTS as well as it performs, not one or the other as compromise is not an option. Is this the same Streamline filter that lit up M3Forum.net and catapulted Helene Performance into existence by providing a true custom tuned panel filter? YES! Why does this filter have less pleats then the competition? We are tuning this filter to the stock air box in order to optimize the air flow for its configuration. Having said that, it is very likely that the production filters will have less pleat count then this prototype. Reducing pleat count will decrease dust loading capacity but it will easily go for 10k to 15k miles between cleanings (depending on local condtions). How much will this cost Pricing will be very competitive relative to current offerings. It will be inline with the current pricing levels of Streamline filters most likely. __________________ BMW strut bar /// BMW perf exhaust /// ZHP shift Knob /// MFD Scoops ///M3 floor mats (from old car LOL) Last edited by BattleWagon; 03-21-2008 at 09:24 PM..
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