11-04-2020, 07:43 PM
Hi Gurus,
Glad you liked the video. It was a single take and the discussion did not cover everything as well as I might have wanted.
Let me give a little more detail.
The only filter manufactured that is rated by the maker for reverse flow is Racor its part of the Parker family of products.
Here is a link to a technical data sheet that shows reverse flow.
https://www.parker.com/Literature/Racor/...-_7656.pdf
I do not think it is much different then the other makers products as they are all made to be replacements with specific specifications. They might have made the internal spacing on the pleats to have a bit more spaceing. I'll find out when I cut the old one open and compare. Either way, it was not correct to mount a filter in the reverse flow orientation without the filter being rated for that use. As an additional bit of information Newell is now using the Racor filters on the new coaches so they probably realized the mistake. However they are still using the other makers products in the reverse flow orientation on coaches coming in for service which is something they should not be doing.
My plan is to join 2 filters together by opening up the back wall of the first filter and joining it to a second filter essentially doubling the filter area. This would eventually be replaced with a custom canister that can take 2 cylindrical filters and form the necessary seal. I will also address where I pick up the air from to keep air temperatures within limits. Most likely it will wind up on the passenger side compartment behind the louvered door.
As an additional thought we should keep in mind that filters should last for a reasonable amount of time before needing replacement. What we should be seeing in the filter minder is a gradual climbing of the gauge as the filter fills I'm thinking an absolute minimum reading with a single filter and a proper plumbing job would be in the 10 to 12 inches range. I don't think that can be obtained until I change out the 5" elbow with something better suited. I'm thinking about having an aluminum or Stainless elbow 3D printed in powder petal.
Thanks for the comments
Glad you liked the video. It was a single take and the discussion did not cover everything as well as I might have wanted.
Let me give a little more detail.
The only filter manufactured that is rated by the maker for reverse flow is Racor its part of the Parker family of products.
Here is a link to a technical data sheet that shows reverse flow.
https://www.parker.com/Literature/Racor/...-_7656.pdf
I do not think it is much different then the other makers products as they are all made to be replacements with specific specifications. They might have made the internal spacing on the pleats to have a bit more spaceing. I'll find out when I cut the old one open and compare. Either way, it was not correct to mount a filter in the reverse flow orientation without the filter being rated for that use. As an additional bit of information Newell is now using the Racor filters on the new coaches so they probably realized the mistake. However they are still using the other makers products in the reverse flow orientation on coaches coming in for service which is something they should not be doing.
My plan is to join 2 filters together by opening up the back wall of the first filter and joining it to a second filter essentially doubling the filter area. This would eventually be replaced with a custom canister that can take 2 cylindrical filters and form the necessary seal. I will also address where I pick up the air from to keep air temperatures within limits. Most likely it will wind up on the passenger side compartment behind the louvered door.
As an additional thought we should keep in mind that filters should last for a reasonable amount of time before needing replacement. What we should be seeing in the filter minder is a gradual climbing of the gauge as the filter fills I'm thinking an absolute minimum reading with a single filter and a proper plumbing job would be in the 10 to 12 inches range. I don't think that can be obtained until I change out the 5" elbow with something better suited. I'm thinking about having an aluminum or Stainless elbow 3D printed in powder petal.
Thanks for the comments
2008 Newell #1223 4 slide, Cat C15 with ZF 12 spd, 2004 Chevy Silverado 4x4 Duramax 6.6