Ok, so I have what I think is a unique question with regard to these filters. I know the JWT is oiled, whereas the AEM is dry-flow. My question is this:
If both are on a velocity stack, which is going to flow better? As you can see in the pictures, the JWT has a concave 'cone' going in the top, while the AEM filter has a rubber 'cap'...
I know the difference is probably negligible, but I really would like to know what you guys think about this. Does the JWT allow better airflow due to the 'concave cone' in the top of the filter?

 

I prefer JWT just my $.02

 

Ok, but what about my question???

 

The Apexi pop-charger has the reverse cone cap, and it's dry, and it has the velocity stack design built in.

Just saying...

 

I'll suggest a theory, but have nothing to back that. I think they would both provide very similar flow for the simple reason, the oiled unit is designed with less resistance, relying on the oil to trap debris, where the other has a far greater surface area to draw in air, even though a potentially more restrictive material.

The only way to know is to find readings on a CFM flow of these filters to compare, but chances are both manufactures will use apples to oranges comparison. You'd need to find someone that actually did an independent comparison to find out if the difference is indeed nominal.

Something else to consider with a filter is longevity once the dirt starts to build up after 5 or 10 thousand miles...I'm sure one will become more restricted over time, requiring cleaning more frequently then the other.

Again, all theory, I just had a few minutes to kill...

 

Do you have the part number/dimensions/specs on that apexi you have Rochester? It's the same size (6x5) right?
Oh, and why do you have Maf -> Maf adapter -> coupler -> filter? Doesn't the JWT just go directly on to the Maf housing?

 

It's the universal filter, available on Berk's website.

To push it as far away from the engine as possible.

Actually, the part sequence is: TB, coupler #1, mid-pipe, coupler #2, MAF Housing, adapter plate #1, coupler #3, adapter plate #2, air filter.

 

I wonder if surface area of the filter element has anything to do with it?

If someone has access to both intakes and a data logging capability, I would say get some MAF logs and compare them. That would be the only way to see which one flows better.

I like the JWT, but it's only because I've been using this same type of intake/filter since 2000, and appreciate the quality, the customer service and the fact that the replacement filter is only 30$ shipped .

 

I understand that most after market filters will/do outflow the factory setup and provide more than the required amount of airflow.
That being said, I replaced the K&N oiled filter on my Stillen setup with an AEM for the sole purpose of eliminating the oiled filter.
When I changed them out, I noticed an oily residue starting to form on the throttle plate and sensor. This was after only 1K miles. Not Good.
I don't notice any change while driving, be it cruising or standing on it.

 

Maybe you shouldn't have over oiled you filter

 

My JWT unit uses the new R2C Filter which is a dry unit and has a plastic cap on the front like the AEM you pictured above.

Cattman sells the R2C filter as an upgrade so I doubt having that open area at the front makes any difference at all.

I think the biggest difference is having that big velocity stack after the filter, regardless of type.

 

Hey NmexMAX, where do you get your $30 replacement JWT filters? Just for future reference as I think I'm gonna go with the JWT.

 

Cost is a valid consideration. That Apexi pop-charger can run over $70 after shipping.

Ouch.

I buy one every 2 years (about 15K+ miles at a time.) I'm on my 3rd filter.

 

Yeah, that deterred me from going the Apexi route. And even an AEM filter is ~$50 or so... maybe more shipped.
So if I can get replacement JWT filters for $30 (even if it ends up being a little more), that'd be great. I just really need this intake. I'm running a GAB'd airbox, which is good for what it is, but I have a feeling that with my other mods, my engine could be making more power with a little better airflow...

 

I didn't oil it. I purchased it used from a member that stated it was installed new and used for 3k miles.

 

PN: R1227 S&B filters

It's the twinkie .. seriously, identical twin to the "OEM" JWT unit. JWT will try and charge you $60.

 

That's great, thanks hey NmexMAX, why have you never used a dryflow filter of any kind on your JWT stack? Or have you? Why is your preference oiled filters?

 

Never used the dry flow, only because I have 234k combined miles on 2 cars. And have only gone through 2 MAF's, (151k on one car and 1 MAF, and 81k on the other car and 1 MAF, so 2 combined).

And, IMO, the 'dry flow' is for paranoid dudes that don't agree with the K&N oil. That's just me though, so don't take it seriously, I'm sure the difference in power/flow is negligible, so do what you you think is good, or financially stable.

And send me a How To on those LED's ... or come do my interior.

 

Haha, I would love to help you out if I didn't live so far away. I hate how there aren't any orgers or even maxima enthusiasts around here. The closest one was nzelinsky, but he seems to have dropped off the face of the earth...
With regard to the filters, I don't have anything against oiled air filters, so I'm gonna go the JWT route. I believe the whole point of the oiled design is to improve flow... (can have larger pores, because the oil attracts the dirt particles). But, like you said, maybe the difference is negligible. Who knows. My main stipulation is simply that I use a velocity stack.

 

I'd like to get in line for that. Let's see, 1800 miles from Alberta to New Mexico... and then another 1800 miles to New York, and only 2400 miles back home. Are you free this weekend? Drive down and I'll buy you whatever air filter you want.

Alberta, Canada... damn, you're probably digging the snowtires out of the shed this weekend. Maybe next weekend, aye?

Welcome to my world. Feels like I'm on an Island, population: one Maxima.

 

Hahaha wow. K, I'll be right there
And about the winter tires... Usually I can hold out until at least November we'll see this year. You never know...

 

I have Dunlop Winter Sport 3D's ... FTMFW!

 

Yeah, I've got some Hankook Winter iPike tires. They're not top end but they grip surprisingly well and are well worth the money. And as far as winter tires go, they look pretty decent.
Do you really get snow down there?