aFe ProDry synthetic air filter

[petrotk40]

I haven't seen anyone with one of these yet. I was in need of a new air filter so I bit the bullet and got one. No oil issues of a K&N. So far so good, it feels like it is breathing just a little better.

Amazon.com: aFe 31-10027 Air Filter: Automotive

 

[FullyLitLED]

Sure sounds like a good idea...hows the mpg? I will take any upgrade that will improve mpg's lol More power as well?

 

[mechanixhorseman]

I use the AFE pro dry dual cone setup on my 335i, but I keep the oiled TRD (K&N) filter in the landcruiser to better deal with the dusty and sandy environment it often finds itself in.

They're both good filters if you ask me, but at the end of the day they are still just filters and not likely to dramatically or noticeably affect anything other than the sound of your engine. At least for a vehicle like ours. Oiled filters will generally perform and protect better, it's just a matter of whether you want to go to the extra trouble of maintaining them.

 

[NMuzj100]

Oiled filters will generally perform and protect better,

Which oiled filters are those ? The most common K&N filters are known to allow much more dirt into the intake than OEM filters.

There is a reason all OEM filters are dry.

 

[TheFuzz]

I had nothing but trouble w/ the K&N setup on my '99 Envoy. Others have reported no issues. I personally prefer the dry filter setups. Ran an AEM BruteForce system on my yukon with great success.

Keep us posted on any gains you see with this filter, MPG or otherwise.

 

[mechanixhorseman]

Which oiled filters are those ? The most common K&N filters are known to allow much more dirt into the intake than OEM filters.

There is a reason all OEM filters are dry.

They're known to allow more dirt because people don't oil them properly or at the correct intervals. Manufactures are always going to gravitate towards the option that depends on less maintenance over higher performance. They wouldn't have put the TRD brand on an oiled filter if they believed it would allow more dirt in the engine when properly maintained.

 

[MidTex]

I have a friend who highly modifys his cars and has access to a dyno which he uses after every mod. to see how much improvement the mod makes. Back in the early 90's he had a M3 and the dyno showed he lost 1hp by adding a K&N filter.

 

[petrotk40]

I'll post up when I have some more fuel econ info. Only been thru 1/4 tank, I dont drive a lot. It seems to breath a bit easier at low RPMs, but that's about it. It filters and flows better than OEM and will last forever. The brochure thingy says it is 60-70% clean when you just tap the dirt off of it. That's a definite plus in sandy environments.

 

[OregonLC]

The brochure thingy says it is 60-70% clean when you just tap the dirt off of it. That's a definite plus in sandy environments.

Couldn't you say the same thing though for the OEM fiber filter? I've been at the tail end of a long dust trail to the point that my brown truck is white and it still looks fresh. Although, I haven't tried anything else so for all I know it's plugged solid. Sure looks nice and white though.

 

[hoser]

Afe... it's a bit tough to take a company that sells throttle body spacers seriously.

 

[petrotk40]

Couldn't you say the same thing though for the OEM fiber filter? I've been at the tail end of a long dust trail to the point that my brown truck is white and it still looks fresh. Although, I haven't tried anything else so for all I know it's plugged solid. Sure looks nice and white though.

The pleats aren't as deep so I think less gets really stuck in those. Who knows. I needed a new air filter and had $50 burning a hole in my pocket I guess.

Oh, hoser, I got a TBS while I was at it, haven't installed it tho. hoping for 30hp and +2-3mpg

 

[mechanixhorseman]

The pleats aren't as deep so I think less gets really stuck in those. Who knows. I needed a new air filter and had $50 burning a hole in my pocket I guess.

Oh, hoser, I got a TBS while I was at it, haven't installed it tho. hoping for 30hp and +2-3mpg

That's it? I got 83 1/2 extra whp and 10mpg's better from my spacer.

 

[sailor95]

Have yall by any chance experienced TBS's first hand? They do quite a bit in my opinion, my older brother put one on his 98 z71 and it added a good bit of powere and actually about 2mpgs better on average.

 

[TheFuzz]

Have yall by any chance experienced TBS's first hand? They do quite a bit in my opinion, my older brother put one on his 98 z71 and it added a good bit of powere and actually about 2mpgs better on average.

They do exactly dick on a fuel injected vehicle. Looking at it logically:

The purpose of the spacer is to impart "spin" on the incoming air charge, right? On our cruisers, like pretty much ALL modern fuel injected vehicles, the air is drawn in through the throttle body, where it then moves through the intake manifold down into individual runners, mixes w/ fuel from the injectors, gets sucked into each individual cylinder via the intake valves, and is then compressed and fired. How is the "spinning" imparted on the air charge at the throttle body is going to have any appreciable effect by the time it has been broken up and redirected several times before reaching the cylinders?

Now, spacers DO have some merit on older carb'd cars that use intake vacuum to suck the fuel in, since the spinning effect helps to atomize the fuel more effectively. In a car w/ EFI though, the fuel is already atomized as it's forced through the injector nozzle...there aren't really any gains to be had there.

I hear the "I gained 5mpg and 40hp" stories all the time, but it just doesn't add up. Kinda like the gains from the deck plate mod. Nobody understands how they work since it makes the fuel trims all kinds of goofy, yet noticeable gains are reported on the pants dyno.

 

[Gottagetone]

I installed the Spectre air filter, its a knock off of the K&N that I found at Advanced Auto Parts. I checked the mileage all the way to Colorado and back from Austin and found virtually no improvement in MPGs. The truck did "feel" like it breathes better but thats all seat of the pants. For $25 I dont have to buy another filter so to me its worth it. I clean it every oil change and check the TB for dirt on a regular basis. I did a full post on it here not long ago, for the money, I give it a thumbs up.

 

[NMuzj100]

I have an air restriction gauge installed on my air box and cannot get it to register any restriction with the stock set up and new OEM filter under any conditions. There is no indication of an air restriction problem that needs fixed. If you can figure out a way to inject more fuel then you you might need more air.

But everyone wants to believe they know secrets to cheap performance and fuel mileage that the auto industry is hiding from us. If you have the secret knowledge I say go for it.

 

[sailor95]

My bros truck is fuel injected also and the gain was noticeable and we did some mileage calcuations and it was like 2mpg better all around. And also gains on a dyno with those could not be seen since there is not air being moved at high rate through the tb itself