Modified Stock Airbox for K&N Cone Filter w/Pics
Apr 15, 2010, 04:36 PM
#18
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No its aftermarket inlet pipe, i cant get the numbers now, but i will later. Getting fp red and stuff installed. Ill just switch back to hiflow panel and compare dyno
Apr 18, 2010, 09:42 AM
#19
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Me too, Assuming both versions had Intake piping , going by the size of the cone filter 4inch diameter and 6 inch length, if you unwrapped it, I dont see any more surface area for air to pass then the K&N drop-in, if anything it may be less. (each flap on the panel filter is much deeper then the cone also) Is there a charactoristic of a cone filter that flows better?
Apr 18, 2010, 10:15 AM
#20
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Surface area only really matters in drop-ins imo. Cone filters have minimal to no pressure drop and increase airflow with a quicker access to the intake tube. If panels were the way to go, then we would see panel filter intakes instead of cone filter intakes. The point is my tune was with a hiflow panel filter from Perrin, swapped on the k&N cone modified airbox intake to fit it so no heat soak and was surpassing airflow limit tables in every gear, that right there shows its flowing more air then a panel filter. Alot of panels are doubled up also, which creates obstacles and turbulence in airflow. Only downfall is youll get less filtration with cones as gauze elements are usually only a 16th in size, compared to 2 inches in other panel filters.
Last edited by ZWingerRyRy; Apr 18, 2010 at 10:22 AM.
Apr 18, 2010, 10:54 AM
#21
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that perrin looks like a brillo pad,lol, I know large cone filters would flow more, I'm comparing surface area of K&N drop in to your 4x6 cone. the 4 x 6 does not seem big to me. and no the K&N drop in and cone are same thickness in gauze elements you are comparing totally different filter, the perrin
Apr 18, 2010, 04:34 PM
#25
While you did a good job curing the idle MAF issue on an exposed WAI, you are highly restricting injestion opportunity for your conical filter due to the limited airflow potential of the stock airbox.
I'd lay money this mod will flow slightly less than a K&N drop in filter, which can be easily proven with a turbo that will outflow either setup, a competent Ecuflash tuner, and a dyno.
You'll have to do more than swap and compare runs, because the tune will be optimized for whatever goes first. Custom tunes on both will show the truth.
I haven't seen this on a 4B11 yet, but I've seen something similar on a 4G63 get whipped on the dyno by a stock airbox and a K&N drop in, hence my opinion.
I'd lay money this mod will flow slightly less than a K&N drop in filter, which can be easily proven with a turbo that will outflow either setup, a competent Ecuflash tuner, and a dyno.
You'll have to do more than swap and compare runs, because the tune will be optimized for whatever goes first. Custom tunes on both will show the truth.
I haven't seen this on a 4B11 yet, but I've seen something similar on a 4G63 get whipped on the dyno by a stock airbox and a K&N drop in, hence my opinion.
Apr 18, 2010, 04:42 PM
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No way, I disagree. I would make it work just like the sport bikes. RAM AIR and pressurize the box. This is something I believe will work well with the right engineering.
Apr 18, 2010, 07:01 PM
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While saying on topic. This wasn't a test. It was a idea for people that don't intend on spending +300 on a intake without heat soak. I'd wish people would stop debating on power as nobody has proof either or so don't assume unless proven. Airflow/torque limits have been raised to support the cone now. Ill get a dyno out before i switch to the red since this thread has changed to a debate. Jebus 
Apr 19, 2010, 01:28 PM
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it's all well and good to debate whether it will make power or not, but i think the point of the mod is to keep the stealth look, and it's something different.
I think this will make more power than stock and if that's all he wants then that's good enough for him. I don't think it will make that much more power than stock because it's still on stock piping which is the main restriction left once the filter panel is changed to a cone type. but it's just a different mod and could probably be done for less than a $50 panel filter.
I think this will make more power than stock and if that's all he wants then that's good enough for him. I don't think it will make that much more power than stock because it's still on stock piping which is the main restriction left once the filter panel is changed to a cone type. but it's just a different mod and could probably be done for less than a $50 panel filter.
