Performance Air Filters for a W9 with Cat motor.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by ProfessionalNoticer, Aug 22, 2021.

  1. ProfessionalNoticer

    ProfessionalNoticer Road Train Member

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    Is there such a thing? Of not; who makes the one that has the most flow for a tuned Cat in W9?
     
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  3. 062

    062 Road Train Member

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  4. benjamin260_6

    benjamin260_6 Medium Load Member

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    Fleet air filters. They're a foam/oil filter. As long as they're oiled properly (you'd be surprised how many people think they're doing it right but aren't) they flow better than a new paper filter and filter considerably better
     
  5. ProfessionalNoticer

    ProfessionalNoticer Road Train Member

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    I just got my oil analysis back from Cat after my rebuild and the silicon was elevated at 21. Not sure how bad that is.
     
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  6. blairandgretchen

    blairandgretchen Road Train Member

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    It’s not bad. Typically they won’t flag it till 50 ppm.

    Still - less is better.

    I run an Amsoil BP filter, and I’ve got the Fleet Air.

    Much more sucky sucky vroom vroom.

    Very technical information I know.
     
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  7. ProfessionalNoticer

    ProfessionalNoticer Road Train Member

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    I just realized those paper filters had 30k on them. I used to change them out every other PM and those were done at 10k intervals. So I was halfway to bad silicon territory with the 21. No bueno.

    So which of the sucky sucky vroom vroom do you think is the better of the two you're currently using?
     
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  8. blairandgretchen

    blairandgretchen Road Train Member

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    I fully recommend a bypass filter - the Amsoil was about $350 - vs that overpriced KR thing.

    Good thing about foam filters - clean every 10-15k, or when you’re bored. Every time you do, you’re saving the paper filter cost.

    To me - it’s about the most important thing on a combustion engine - clean and maximum airflow.
     
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  9. BigBob410

    BigBob410 Road Train Member

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    I thought it was sucky sucky boom boom vroom vroom.... I’m guessing these reusable foam filters are the big truck version of a K&N?
     
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  10. blairandgretchen

    blairandgretchen Road Train Member

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    I’ve only heard of K and N.

    The FA filters are a 3 wrap Velcro fastened foam sheet around a metal cage.

    I noticed you can actually hear the turbo better after installing.

    Who doesn’t love the sound of a turbo spooling up?
     
  11. rollin coal

    rollin coal Road Train Member

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    Silicone is basically dirt. It's normal for that to be a little elevated after a rebuild or sometimes even an overhead. In my opinion though it shouldn't spike after an overhead, but it might. Who does your oil samples? If it's CAT call them up and ask about that, they'll answer your question. I started using Blackstone Labs with my Detroit. And they will definitely explain a sample mostly without the need to call them and ask for more info. They cost a little more but I think are worth the extra $. As far as air filters I've always preferred Donaldson. Not really a fan of the oiled filters but to each his own.
     
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