Aftermarket Air Filters & Rain

[dieselcruiserhead]

With all of this crappy weather leately it has me wondering. First I swiss cheezed my air filter and drove it a ton this weekend through some pretty nasty storms and seems OK. But I am worried about moisure both saturating the filter and water possibly getting through? I have a paper filter now but am shortly going to something aftermarket & reusable with more air flow...



Possibly a K&N (havn't thought about it much) but I have a Snorkel now so the intake is much higher so much less dust etc so the K&N should work fine... (??) I need something with a 3" round intake, about 6-8" long and maybe upto 6" wide, cylinder shaped... I have found the right K&N numbers. Unfortunately no bolt on kits for me, all has to be custom...

 

[JLEONARD]

I have a K&N and it is now simply resting on the fenderwell... I know it takes in water because the truck runs with more power during a rain...

Actually some water getting thru won't hurt anything... . with a paper filter it will render the element useless, but with a renewable style you'll be fine.

The filter I really like however, is the S&B filters... similar to a K&N but much heavier duty and deeper pleats. I had one on my boat Cummins. Nice well made unit.

You can get them with a 3 inch neck.

 

[cerberusiam]

Since you are in UT I would highly advise NOT using a K&N or any other renewable element filter. It is just too dusty and dry this side of the rockies to take a chance on dusting the engine. A paper filter with an Outerwears pre-filter will keep things in good shape unless you drown it. The pre-filter is treated to bead water and keep it out. When it starts getting wet and not beading it is time for a prefilter. Given good care a high quality paper filter should go 50k+ before you have to replace it.

I know it takes in water because the truck runs with more power during a rain

Shame on you Mr Leonard!!! You will start an urban legend talking like that!





Jleonard likes his K&N, and given where he lives, it is probably just fine. Out here in the high desert we have this fine stuf called DUST that never shows up where he comes from. The wind blows it all inland for somebody else to deal with. Before you jump into the K&N arena do some searches in the 2nd gen forum on it and dusting the motor. Some of the reading is down right scary. An AH19036 with an Outerwears prefilter is hard to beat for flow, filtration, life, and harsh environment use.

 

[wildwestdiesel]

domt be worried about the water 9ever heard of water injection?) as for the K&N cerberusiam has a good point. I lve in southern ut and run a k&n BUT i maintain it very well and do oil samples ect. with no problems. Allthough on a first gen (I have one) the stock air filters are plenty big (more surface than the 2nd and 3rd gens) and should not need to be any bigger unless your cranking 450 hp. After 50k my oil samples silican (dirt/sand) still read the lowest possible on the acceptable rating

 

[cerberusiam]

One other note on the K&N filter. If you intend to stay pretty much within stock boost levels, 25 to 30 psi, it is probably as good as they come. The problems appear when we start pushing boost levels over 35 psi. Simply too much flow required for the filter to work effectively as designed.

 

[Sri Ram]

A little off-topic, wildwestdiesel and others, where do you get your oil analysis done?

 

[JLEONARD]

Jleonard likes his K&N, and given where he lives, it is probably just fine

Yes I do check the compressor blades from time to time and have never found any residue that would indicate a dusting problem. Now that I have the bigger turbo I will monitor it more closely esp with winter comming and all the sand on the roads...

Jay

 

[dieselcruiserhead]

Interesting & thanks guys. I wheel a lot and it is usually really dusty but the snorkel helps quite a bit with that. . . Even when following a vehicle dust is rarely over 4' high so the K&N might work. I barely push 20 psi with the turbo so I'll be fine. Drove through massive rain last weekend and drove fine but I was a little worried about it. Anyway, I;ll start looking at filter options. Gov spring, 4" exhaust, and good intake and I am done with this engine. Getting pretty close already, but adding up of course... Andre

 

[wildwestdiesel]

I get the oil samples from Caterpillar Machinery.

 

[pepecat]

BHAF vs. Stock trash can

What you all are saying is true about the stock airfilter flowing well for the first gens, my first hand experience from stock filter (open no airbox) v. s BHAF is that I didn't gain any more flow I. e. the Stock filter wasn't hindering any airflow in and of itself, however, with the stock airbox around it I would see lack of flow. I can't tell the difference in turbo whine volume or boost levels between the BHAF with outerwears (current setup) or the stock filter that is open, sitting on the fender. Problem is keeping the water off the small trash can w/out the airbox, so in conclusion, get a BHAF with outerwears! Howeveryou have a 4bt, and a 3" inlet, not 4" like us so maybe you need to go to the site : http://www.fleetfilter.com/airfilters.html and get yourself a custom setup with one of these filters, they're a good deal at that site too. JUst do your reasearch beforehand on what filter size you want and then make an order online

Nick

 

[RailroadJim]

Has anyone tried using scotch gaurd for the outwears after it's been washed instead of getting a new one? or might it restrict too much when enough is applied to be effective? just a thought.

 

[Greenleaf]

I say... ... ... "don worry 'bout eet"



I assisted a friend in hot rodding his Pet cab over w/kitty CAT 3406 and we installed water injection right into the turbo inlet flange just inside the guilleteen (emergency) shut down.



Angry CAT... kitten has claws

 

[ubcummins]

soooo ya'll think my first gen will do o. k. down here in fla with a k/n stuck right on my

inlet are do i have to space it?

 

[DBF]

A little off-topic, wildwestdiesel and others, where do you get your oil analysis done?

Blackstone Labs, Ft Wayne IN. PM me your e-mail address & I'll send you a copy of a report I received from them.



DBF

 

[Greenleaf]

No, don't install the filter directly ONTO the turbo inlet flange. Make yourself an air intake pipe from exhaust tube and 45° rubber elbow or buy one from a performance shop. Sam's ASA Modified is just as I described above. Very simple and easy to install too.

 

[tugboatphil]

Railroad Jim,



I wouldn't recommend Scotchguard, as it "fills in" the spaces in the fabric to attain it's water/stain resistance.

 

[RailroadJim]

Well that's kind of what i thought as well, just wondered if someone had tried it.

 

[Greenleaf]

Air intake assembly like this is what your after?