OK, I know I'm new to this and p r e t t y s l o w.... :D but I just gotta know what I should do for a bigger air filter. I take it from reading some posts that a BHAF is an after-market, much bigger air filter. This allows more air into the turbo, thus increasing output and reducing fuel mileage. Am I on the right track?

So, if thats the case, what BHAF should I look at, and how much? Is the BHAF an interior filter (i.e. is it housed inside an air filter housing), or is it external of a hard air filter housing?

PS. New clutch just cost me $700. Thats the LUK Pro Gold Series clutch and a new flywheel.... A friend and I are installing it on Friday. Wish us luck!!!

There is only one "BHAF" filter. It's actually a big rig paper filter which has a lot more area than the stock filter. It allows the turbo to breathe better, but its affects aren't noticed until you start developing serious HP. It does however let the turbo whine out which is why I use one for my "sheep in wolf's clothing" ride. Check the FAQ section for filter numbers.

Here's some of the part numbers for the BHAF, I am in the process of ordering the Wix Filter and and Outerwear Pre-Filter anyways the part #'s....

John Deere PMAH19037 $55
Wix 42790 $29.41
NAPA 2790 $57.04
AFE 20-40044
Hastings af 1012
Carquest 87790 $64.78
Caterpillar 3i 0005
Fram ca 6818

Pre-Filter
Outerwear wr 3325-105
AFE 28-10033

So do you have to do any modifications to install one of these filters? Lets say I wanted to go with the NAPA filter. What would I have to do to fit it on?

So do you have to do any modifications to install one of these filters? Lets say I wanted to go with the NAPA filter. What would I have to do to fit it on?Remove the stock air box and attach the hose to the end of the filter is about it. There's a pattern, I think also in the FAQ section, for a heat shield that you can make to shield it from the engine heat a bit. Not required, but might be helpful.

hooks right to the stock intake tube and it looks like this(sans the Outerwears)

http://www.dieseltruckresource.com/pics/data/500/27816Outerwearsr.jpg

...thus increasing output and reducing fuel mileage. Am I on the right track?...

it will not reduce your fuel mileage, but im betting $20 you already knew that and the above was a typing error :)

it will not reduce your fuel mileage, but im betting $20 you already knew that and the above was a typing error :)

Actually, it does a little bit.
You can hear the turbo more, so you tend to have a heavy foot to produce more and more turbo noise.

After a couple months, it wears off, and mileage returns to normal.


phox

Where can i find one of those outerwears, thanks in advance-Justin

I believe the link is Outerwearsracing.com

Cool, thanks again.

hooks right to the stock intake tube and it looks like this(sans the Outerwears)

http://www.dieseltruckresource.com/pics/data/500/27816Outerwearsr-med.jpg


where do you get those covers like that ib your BHAF, are they water proof?

where do you get those covers like that ib your BHAF, are they water proof?

Not water proof, but quite water resistant.

http://www.outerwearsracing.com/products.taf?_function=detail&product_uid1=838&_UserReference=3952B68B7B22392E43D83493

If link doesn't work, click on "search by make and model", then put BHAF into the keyword box.


phox

where do you get those covers like that ib your BHAF, are they water proof?

The link is already posted above.

The filters themselves are/should be waterproof. I had a 2818 Baldwin on my PSD and it was waterproof. The filtering media is more advanced in the better filters over a paper filter. The higher cost is evened out by a longer service life.

Big Jimmy

This is my kind of thread! Slow........ with pictures!

The filters themselves are/should be waterproof. I had a 2818 Baldwin on my PSD and it was waterproof. The filtering media is more advanced in the better filters over a paper filter. The higher cost is evened out by a longer service life.

Big Jimmy

Incorrect - unless you spring for the big dollar synthetic Fleetguard (sorry I dont have a p/n) none of these filters are waterproof. They are paper - therefore the outerwares racing cover is a really good idea.

Incorrect - unless you spring for the big dollar synthetic Fleetguard (sorry I dont have a p/n) none of these filters are waterproof.

Fleetguard Marine BHAF-AH19002, $120 or thereabouts, and still only water resistant, not "proof"


phox

Fleetguard Marine BHAF-AH19002, $120 or thereabouts, and still only water resistant, not "proof"


phox

I think we are in the hair splitting arena now. The baldwin is not a paper filter. It may not be "proof" But does it need to be??? I should have used the word "resistant", for that it is, ie it "resists" water being pulled through it. I know the baldwin is not one of the BHAF used in a CTD, but I would think the ones that are would have a non-paper equiv. thats not too expensive. For example, the NAPA cross reference for the Baldwin I used in my PSD was the same filter in all respects EXCEPT it was paper. Same price too. Go figure.

However, I consider myself spanked.[tapdshut]
(I never thought truck owners could be such sticklers about filters, and if they are waterproof or water resistant or sponges. You'd think we were driving trucks with the hood up in a downpour) I bet someone is going to speak about how much H2O gets drawn up into the engine area next... ;)
Big Jimmy

Pgilles - I guess you would have won that $20 bet. Typo. I meant increasing fuel mileage!!

yeah like others mentioned....more airflow does not help much unless you are also increasing fuel to engine and likewise reducing backpressure on exhaust.....so initially you will have lots of air and more turbo whine but that is about it.....or so I understand.

I was recommended to get a set of gauges first...before I did any engine mods so I could get used to NORMAL readings.... Those should be in next month. Then a little at a time.... :)

one very important thing everyone forgets until it is too late......you need to get some fuel line about 8 inches long. cut it down the middle and put it over the A/C line up near the firewall. if you do not protect your a/c line with a hose the filter will eventually rub its way thru the line causing a leak in your a/c system......

go with a Scotty and it'll be all the air you need, mine is on its way

Here's some of the part numbers for the BHAF, I am in the process of ordering the Wix Filter and and Outerwear Pre-Filter anyways the part #'s....

John Deere PMAH19037 $55
Wix 42790 $29.41
NAPA 2790 $57.04
AFE 20-40044
Hastings af 1012
Carquest 87790 $64.78
Caterpillar 3i 0005
Fram ca 6818

Pre-Filter
Outerwear wr 3325-105
AFE 28-10033

Well I'm not sure where you got those prices, but I just got off the phone with my local Napa store, and they show the Wix at $70, and the Napa at around $120. I was about to order one if they were $29.41, but no deal.

Jim

one very important thing everyone forgets until it is too late......you need to get some fuel line about 8 inches long. cut it down the middle and put it over the A/C line up near the firewall. if you do not protect your a/c line with a hose the filter will eventually rub its way thru the line causing a leak in your a/c system......


do you still need that even if you have a heat guard?, and thos covers, are theyworth it, my dad was freakin out cause we live down a dirt road and he is all worryed about my BHAF gettin wet and gettin a hole in it and suckin dust into my turbo and mototr, so i was just gona get an AFE and put bakc in my stock air box.....what do you guys suggest?

Well I'm not sure where you got those prices, but I just got off the phone with my local Napa store, and they show the Wix at $70, and the Napa at around $120. I was about to order one if they were $29.41, but no deal.

Jim

www.fleetfilter.com

# 42790

do you still need that even if you have a heat guard?, and thos covers, are theyworth it, my dad was freakin out cause we live down a dirt road and he is all worryed about my BHAF gettin wet and gettin a hole in it and suckin dust into my turbo and mototr, so i was just gona get an AFE and put bakc in my stock air box.....what do you guys suggest?

See my gallery, dry as a bone.

Yes, they're worth it, if even for peace of mind. :)

check out th prices here.
http://www.fleetfilter.com/index.html

yes you should cover that a/c line no matter what............

what about the sensor thingy on the stock airbox? what should be done with that on an 04?

www.fleetfilter.com (http://www.fleetfilter.com/)

# 42790Your Order ItemCost1 42790 Air
Filter $29.41Subtotal: $29.41Shipping: $10.32*Total: $39.73

Does the BHAF flow more than the K&N cone filter?

Do I need one under 300hp. Does it lower egts any? I am still under warranty. I quess I would have to put back on orignial in needed.thanks

I'm considering the air temperature under the hood. In cool weather, my BHAF is ok but it's HOT out there now and the Scotty with the big cowl inlet would get cooler outside air to the turbo which means more hp.
Does the Scotty flow as much air as a BHAF?

I checked air temp with a digital meter in the cab and the lead hooked right on the bhaf. It was in the high 80's or low 90's when I checked. In VERY heavy stoplight traffic the under hood temp of the filter was as high as 100-103 I think is the highest I saw one day. As soon as I started, fan would blow and you could just about watch the numbers starting to drop. I got on the highway and started to go and it dropped down to like 78-80 degrees. I don't do much city driving so that temp for as little as I care to be in the city is no big deal.

I checked air temp with a digital meter in the cab and the lead hooked right on the bhaf. It was in the high 80's or low 90's when I checked. In VERY heavy stoplight traffic the under hood temp of the filter was as high as 100-103 I think is the highest I saw one day. As soon as I started, fan would blow and you could just about watch the numbers starting to drop. I got on the highway and started to go and it dropped down to like 78-80 degrees. I don't do much city driving so that temp for as little as I care to be in the city is no big deal.

What kind of ambient temps? I have the Juice, which reads intake temp in the manifold and have seen 135* on 100* ambient temps. In cooler weather I am under or around 100* intake temp.

Here is my BHAF and custom air box I made. http://towrig.com/photos/data/510/untitled.JPG
A new filter that has just hit the market is the Amsoil 4090. These are nanofiber synthetic filters that do not use oil, can be blown out and reused, and flow more than a BHAF and a little less than a bad filtering oiled filter. I would have one if they come out with a red color line.
https://www.amsoil.com/products/ea_filters/images/EaAU-group_200px.jpg

Kroner, I like the BHAF lots better than my K&N...turbo inlet wheel is cleaner too.

SSweeney, Need one? nope, but if you want a greater airflow capacity and turbo sounds, the BHAF lets sound out as good as it lets air in.

Nice box RJF, right color too. :cool:

On 100 degree days the turbo compressor really heats up the air...I can't hardly touch mine after getting home and motor idling. The aftercooler cools it back down near ambient before it goes to the engine intake.
Dodgeguy's temperature research indicates there's alot of air under the hood and some doesn't go through the radiator.
Another benefit of a cowl air source is a possible air pressure improvement to the turbo inlet at highway speeds. There was a seat of the pants power improvment at a 70 mph punch between the scoops on my long gone '70 W-30 open vs stuffed with towels.

Well, I have put a BHAF on the flow bench, and it flowed more air than the bench could measure...I'm curious as to what these other brands really do flow.

Do you mean the water column(red) wouldn't even come up to 1"?
If you get any inches of water, you can do a conversion as described in the Superflow black book.

Just to set the story on the Marine version BHAF straight:

It is the same as the BHAF, except that it has a wire mesh internal. This is in case the filters do get wet, the suction will not pull the wet media into the turbo. It is unnecessary for our trucks.
If you search back to my posts in01/02, you will see the specs on the research I did.

:cool: Love the sound


http://i144.photobucket.com/albums/r193/demon_044/BHAF001-1.jpg