Originally Posted by MarcusF
The Mann filter for my CLK430 has pleats. Each pleat is 7 inches long and .75 inches tall. Thatâ€™s 5.25 square inches per pleat. With 116 useable pleats (there are 123 total) thatâ€™s 609 square inches of surface area. Per filter. There are two filters.
Whatâ€™s the surface area of the filter youâ€™re selling? Also, whatâ€™s the CFM rating?
You say the stock airbox traps heat. Is that a guess or are you using an intake air thermosensor? The reason I ask is a normally aspirated 4.3 liter spinning at 6000 RPM, at 90% volumetric efficiency is ingesting over 180 liters of air per second. That being the case, it doesnâ€™t seem as though the air is in the airbox long enough to be "trapped and heated". If that's true, and a normally aspirated engine is ingesting hot air, the air would have to be preheated before entering the box, or the air box would have to be large enough to hold a considerable amount of air, neither of which fits the profile of the factory box - would you agree?
If I was to tell you that the K&N filter (part # rc-4700) on this kit flows up to 900 CFM, would you agree thatâ€™s more then enough for the 4.3, or even the 5.0 engines with out calculating the surface area?
No I havenâ€™t measured the temperature difference between the two set-ups with a thermo sensor. The only reason why I mentioned that the stock airbox traps more heat, is because the guy who posted the prior replay seemed to be concerned that my set-up will consume wormer air then the stock. However I have touched the stock air box after driving the car, and I have also touched the intake I have on now, and without question this set- up runs much cooler. I am not arguing with your statement that the air travels so fast through the system that there is not much time for it to heat up.
Please understand that I am not stating this system delivers more power because it delivers cooler air to the combustion chamber. This system delivers more power, just like any other high performance after market intake system, simply by elimination as much restriction as possible in the air flow.
If you really want to feel the difference simply take out the stock air-box assembly and take you car around the block without a filter (this is not recommended, but if you do it make sure there is no dirt around the mass air flow sensor). If the OEM on your car compensates for the amount of air thatâ€™s coming in, you will feel the difference in power.
At its most basic level, an engine is an air pump. More air entering the engine increases the efficiency of the combustion process creating more horsepower and torque. This system is designed to increase engine performance in both horsepower and throttle response by reducing air flow restriction.