Ok guys, who can help me out here...?

I want to put in a cone filter and remove my airbox. I have a nice K&N cone filter on an inlet tube with the MAF sensor attachment nicely left in place. However, I need a heat shroud.

ipd and EST both say around $130-$140 for JUST the metal heat shroud... seems steep for me... was wondering if anyone ever tried to bend their own sheet metal and replicate what these guys are selling?

 

It would be worth a try. Some guy posted a pic of what he did with his box filter about a week ago. He cut the top of his filter box so the cone would fit in it.

 

Right, but the heat-soak there, with that setup, would be unreal.

 

grab some cardboard and make a template of what you want.

the flat rate shipping boxes at the post office work nice since they are free =)

then you can fab it out of some alum sheet stock, or even take it somewhere for them to do it...

 

If you are talking about my old setup I didn't cut the top of the box off. You unscrew the MAF sensor from the box and then remove the clips that hold the top of the airbox to the bottom part and just remove the top of the airbox. Very simple. You will need a Torx driver though forget which size. T-10 or T-25...

As for heat soak, yes you would see a lot without sheilding of some kind. So fab up your own. Your N/A so it isn't like your going to see any gains anyways. You will get some sound and that is about it. I found out as to most that modding a N/A becomes pointless. At least engine wise. Cosmetics and suspension sure very easy and looks great but for engine performance you need to start with a turbo model.

 

without ripping into the engine im going to have to agree with s70driver.... and there really isn't that much out there for internals...

saying that im not saying that you shouldn't mod your car... if you want to... go ahead. =) everyone has a preference

also... a thought just hit me.... how much more filter area is there on a cone filter over a standard panel filter? why not just get a drop in?

measure the 2 circumfrances on your cone and shoot them to me... I'd love to do the math to see if its even worth it...

 

Here is the link: https://volvoforums.com/forum/volvo-850-16/850t-air-box-mod-my-writeup-44300/

Air box mod.

 

I have a drop in. I kinda like the example that K & N has on the shelves of many auto parts stores. They have a plexy glass model with a fan on it. Slide the lever one way the ping pong ball rises to the top, slide the lever to the other filter, it hardly rises. While running that test, I took a piece of paper and started blocking part of the K & N filter until the measurement on the ping pong ball was the same and basically I had covered 1/2 of the K & N filter. That was a clear and simple example for me. Now, what the difference would be in a cone or box K & N filter is not known to me. I'm sure someone could chime in here.

I guess the ultimate test would be on the track. Have someone tell what times they had with a K & N box vs their new K & N cone, with all other matters the same. That is what test & tune track days are all about.

 

I put the panel in my car and I think its great. I was going to do the math but didn't have the cone or time anyway. If and when you do them let us know what the surface area calcs show. To me from a pure eyeball point of view I think the panel is just as big.

 

my eyeball must be calibrated the same as yours bobec. I think the drop in is pretty close to the same size. but when i end up at autozone or some other shop i'll see if they have any cones in stock and do some measuring. Unless someone can shoot me the numbers.

as for air flow since they are both made by k&n and are the same materials (cotton, mesh, and oil) they are going to flow the same per cubic inch...

 

6.25in bottom of cone & 4.5in top of cone & 6.0in total length

or

160mm bottom of cone & 115mm top of cone & 150mm total length

 

is the length measured along the cone i.e. ruler against the angled edge? or held horizontally from one end to the other?

 

OK... straight across, at a right angle, from bottom to top... it's 6 inches (155mm)

Across the edge, with the angle.... it's 5.75 inches (150mm)

 

OK... straight across, at a right angle, from bottom to top... it's 6 inches (155mm)

Across the edge, with the angle.... it's 5.75 inches (150mm)

 

OK... straight across, at a right angle, from bottom to top... it's 6 inches (155mm)

Across the edge, with the angle.... it's 5.75 inches (150mm)

 

Okay I started to do the calculations and then thought let me Google the surface area of a truncated cone and here we go.

http://www.onlineconversion.com/obje...trunc_cone.htm

so plugging the values in remembering that R = d/2 and using the 6in as the height we get 148.97sq in

But this is the entire cone and we don't have filter on the ends so we subtract the areas of the ends

big end A = (PI) x r x r = (3.14) x 3.125 x 3.125 = 30.66

small end A =(PI) x r x r = (3.14) x 2.25 x 2.25 = 15.89

so the total effective area is 148.97 - 30.66 - 15.89 = 102.85 sq in

My panel is 6.5 x 13 = 84.5 in sq

So my eyeball was wrong and you get 22% increase in area with the cone.

 

Geometry class tells me that the measurement at the angle cant be shorter then a measurement at the 90*

It would have to be a touch longer then 6 at the angle…

This isn’t really helping my first argument too much =/

I guess 6 is close enough… =)

 

1st... sorry for posting that 3 times. I'm doing it from my phone and it kept failing (or at least telling me that it failed).

2nd... I mixed up the teo measurments... along the filter is actually the longer measurements. Sorry guys.

 

Yes I noticed this too but did it both ways and it didn't change the results that much.

The panel made a big improvement in my car and I'm not sure I'd pay the extra money for the 22%

 

Not to get all goofy on anyone or get off-topic, but the surface area of the cone doesn’t matter. The diameter of the intake hose does, which is the bottleneck in this scenario. The filter will not force more air into the hose so it’s size will not have any improvement on performance.

Running with the cone and a heat shield will sound sweet, for sure.