PIttsburgh power mufflers..worth it or not?

Discussion in 'Ask An Owner Operator' started by Beethoven, Jul 21, 2015.

  1. spyder7723

    spyder7723 Road Train Member

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    If you are at the parts country just open up the box and shine a light in. You will see the center is open all the way through, it's hollow. On a baffled road legal muffler the ends have steel baffles. Looks like a cheese grater.
     
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  3. bbechtel16

    bbechtel16 Medium Load Member

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    Thanks for the reply spyder. Looking at Donaldson's catalog so far, that's what I was coming up with. It's half the price of the 463 on Ryderfleetproducts. Claims lower backpressure than the 463 in most applications, although the opposite in other. 463 is listed as offroad, 465 listed as "best value, most popular". The only concern I have is the 465 isn't listed at all on the higher hp applications where the 463 is.
     
  4. spyder7723

    spyder7723 Road Train Member

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    Like i said I was going off memory. I got all this stuff written down in a binder at home. It's very possible im mixing the stock number up with the high flow in my memory. Your best bet is to literally look at the muffler. Is it baffled or isn't it. That's gonna involve a run up to the parts store.
     
  5. spyder7723

    spyder7723 Road Train Member

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    Earlier in the thread this was posted
    Rollin coal wouldn't just make stuff up. He is a good guy.
     
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  6. bbechtel16

    bbechtel16 Medium Load Member

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    I got that. I'm not looking for that one though. I'm looking for the "quiet" straight thru one. I've been researching and that one might actually not be a Donaldson? Or it may be the 465. I'm going to keep digging.
     
  7. bbechtel16

    bbechtel16 Medium Load Member

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    Going through Donaldson's catalog literature it appears if you really want minimal back pressure at high volume (high HP) you gotta go with that 463...
     
  8. 062

    062 Road Train Member

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    Walker makes one called the “silent partner “ or something like that.
     
  9. bbechtel16

    bbechtel16 Medium Load Member

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    That must be a rebadged Donaldson as well. They list mufflers with the same designation. The flow numbers aren't great.
     
  10. bbechtel16

    bbechtel16 Medium Load Member

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    My conclusion here I think is the 463 flows 3200 CFM at 3 in hg. According to Donaldson if I'm understanding the high hp motors stock require 2800-3200 CFM at peak hp and max backpressure you should have is 3 in hg. The 463 is the highest flowing muffler they have, and it's just enough.

    This seems to be the master thread on the subject: high flow mufflers
     
  11. Bean Jr.

    Bean Jr. Road Train Member

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    I wanted to let you know the Walker 22920 is a straight flow muffler. When I ordered the Donaldson, my part dealer didn't stock it, but this muffler cross referenced. I think it was $78 after tax. It has a nice bark right outside my driver window.
     
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