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  • BHAF (Big Honkin' Air Filter)

       (0 reviews)

    Mopar1973Man

    BHAF-installed.jpg.4c306ad83a17748134cbe

    There are several different kits and filters available for assisting Cummins Turbo Diesels to breathe more efficiently. The following are some of my personal findings when considering and using BHAF’s (Big Honkin' Air Filter).

    Firstly, there are air filters on the market that are washable and re-useable. These air filters also claim to prolong the life of the air filter and save money. I have found this claim to be invalid. When a air filter is washed it puts unneeded wear on the media and eventually creates holes in it. These holes in turn allow the passage of dirt. Another issue of washable air filters is they need re-oiled once washed. Most people over oil these air filters, which causes the turbo to pull oil onto the compressor wheel. Once the turbo wheel gets dirty it can cause damage to the turbo.

    Here is typical results of using washable media filters like K&N air filters. What I want you to take notice to is not the amount of oil but I want to to pay attention to the grit and dust stuck to the turbo housing. If this filter is doing its job this dirt and grit should not be present at all in the turbo.

    kn-filter2.jpg.bf97d43d970f263dc394a2a7e

    Here is my turbo after 195K miles and using the BHAF (Big Honkin' Air Filter) since 50K miles (145 total miles) and only on my second filter in 9 years.

    clean-turbo.jpg.db5731328fc9c9c169555fff

    There are several good qualities when considering a BHAF (Big Honkin' Air Filter) or similar air filter. The first quality is it is a completely sealed unit. Being completely sealed there is no way for dirt to pass through the air filter into the engine. The second quality of a BHAF (Big Honkin' Air Filter) is it is roughly 3x bigger than a stock panel air filter. Being bigger allows more air to enter the engine unrestricted. The third quality of a BHAF (Big Honkin' Air Filter) is the media used in it is a dry paper element. Dirt will not stick to this type media, thus almost eliminating the potential of premature plugging.

    An accessory to consider with using a BHAF (Big Honkin' Air Filter) is the Outerwear for it. The outerwear is and works as a pre-filter for the BHAF (Big Honkin' Air Filter) It will protect the filter from heavy dust and water, as well as prolongs the life of it. The outerwear is also washable.

    I have been very happy with my BHAF (Big Honkin' Air Filter) as I now have 109K miles and 5 years on it, and it is just now starting to show dirt.

    Listed below are the different part numbers used for a BHAF’s:

    Fleetguard
    NAPA
    WIX
    Donaldson
    Baldwin
    Hastings
    Afe
    AH19037
    2790
    42790
    B105006
    PA2820
    AF1012
    20-40044
    Carquest
    John Deere
    Big A
    Caterpiller
    Fleetrite
    Luber-Finer
    Fram
    UNI

    87790
    PMAH19037
    93790
    3I0005
    AHR819037
    LAF2531
    CA6818
    908

     

    You can find a BHAF at

    Vulcan BHAF Link

    Amazon BHAF Link

     

    How to test the filter minder

     

    BHAF (Big Honkin' Air Filter) Life in Idaho

     

    Taking A Closer Look At K&N Filters

     

    As for the life of a BHAF (Big Honkin' Air Filter) I've gotten up to 130K miles and 6 years and still never pulled the filter minder down. But started thinking I'm pushing my luck so I change out the filter at 130K miles and 6 years of back country dirt roads and forestry roads.

    dusty-filter.jpg.7e99508402d1d2e56acda33

    As you can see the filter minder still hasn't moved...

    Heat Shield Template for The BHAF (Big Honkin' Air Filter)

    Here is the template for the heat shield shown in my pictures above.

     

    Alternate BHAF (Big Honkin' Air Filter) Part Number

    This is copied from smokey burnouts at
    http://www.cumminsforum.com/forum/98-5-02-performance-parts-discussion/65116-bhaf.html#post643174

    Well this is just info for all who might be interested:

    NAPA BHAF (Big Honkin' Air Filter) number is: 2790, which most of us know and is priced at about $70-75
    But i got a NAPA 6637 which is a very large filter for only $54...might save some folks some cash...and it fits on the factory hose!!!

    Mopar1973man... 6637 is another you can add to you list of filters

     

    filter-minder.jpg

    BHAF_Template.doc



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