Ya that about sums it it. The louvers do look consistent and fully open, albeit still small.
Fram Ultra C&P XG9688
- Thread starter JWC86
- Start date
I didn’t even notice the nubs before so I went and looked and yes I see what you mean, it solely relies on the “face” of that plate for a seal, the plate that’s all wavy …The leaf spring was a really good fit in the end cap because the "nubs" on the ID of the end cap hole makes it an interference fit. So the leaf spring needs to sit all the way down and seal on that thin raised ring on the end cap. If the leaf spring is warped and/or has lots of ruffles there simply will not be a good metal-to-metal "seal" . That's why there's a leak gap and why light shows up so prominently. Also possible that the interference fit with the nubs is too tight and won't allow the leaf spring to sit all the way down in the end cap. If that's happening too, it’s another separate quality issue, and makes the leak gap even worse.
Nubs.... and there is zero sealing going on between the ID of the end cap and leaf spring because the nubs leave a big air gap in that area. The only sealing interface is the leaf spring to that thin raised ring around the end cap hole. Only way it will "seal" is to have perfectly flat and smooth surfaces.
View attachment 295217
Yep, it's a very small sealing area, so if the leaf spring is warped and/or has a ruffled surface, and/or it can't sit down all the way to make good contact, then there's always going to be some level of leakage around the media. It being just a metal-on-metal "seal" means it has to be basically perfect to ensure any good level of sealing.
Look at the last picture you posted, the one with the media cut away and the light shining in. You can see closed louvers that are not passing any light.
Ed
Not very confidence inspiring….I see no improvements into 2025 on these. Poor manufacturing and QC.
Interesting experiment using my closet door. Top to bottom horizontal orientation
*Closed from inside
*Closed from outside
*Light originating from inside taken from outside
*Close up of INSIDE seam that light originated from
The “Inside” seam here would be analogous to where bypass leak would enter into oil flow of cartridge.
*Closed from inside
*Closed from outside
*Light originating from inside taken from outside
*Close up of INSIDE seam that light originated from
The “Inside” seam here would be analogous to where bypass leak would enter into oil flow of cartridge.
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I’ll went and had another look and that’s just how it appears in the picture, must have been dark behind those louvers, they are all evenly open.
Lighting and ANGLES are very critical in evaluating Louvers!!
They can appear closed/crimped when taken from particular angle
Here’s mine
I took particular care to shoot straight down with maximum illumination
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And just what is this "experiment" suppose to prove?
I’ll let everyone judge for themselves as to what a “Flashlight Test” signifies.And just what is this "experiment" suppose to prove?
It's pretty simple by using the light sensor called an eyeball.
1) No visible light = Good.
2) Visible light is seen = A leak gap. The more light seen, the bigger the leak gap.
3) Based on 2), the visual light sensor's input to the "computer" it then decides if it likes the leak gap or not.
4) If the "computer" doesn't like it, then look for a filter that doesn't have a leaf spring that depends on a metal-to-metal 'seal".
5) If the "computer" does like it, then at least only buy high efficiency filters that leak.
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The fluid dynamics calculation shows the impact of a certain sized leak gap. The bottom like is a leak of xx% on a filter that's 99% @ 20u will decrease the efficiency to (99% - xx%) @ 20u. If you don't think it's pretty accurate, then go to that big Endurance thread, get the leak gap measurement dimensions given, and do a calculation to see what you come up with.
Come on ... you've been hashing over this ruffled leaking leaf spring issue for literally months ... jumping in every thread it comes up in and trying to down play it and come up with every twisted rabbit hole "theory" and excuse to try and justify it as "no big deal" ... you own some First Brands or Champ Labs stock?, lolUp to??
So now we open the door to less than??
Maybe 5%??
And since you've seen all the photos posted too (and constantly repost them), you should realize that the leak gap can be anywhere from non-detectable all the way to a pretty large leak gap. The one large one was actually measured and used for calculations. So the leak can be anywhere from 0% to 15% . So roll the 16-sided dice.
Bingo!!
Again …
Your words
So what's you're point? You should know that by now - see below why. This subject matter has been beat to a pulp, yet you never seem to really understand that the ratty leaf spring stamping quality is all over the map, and some are pretty horrible which would be pretty bad leakers. If you're "lucky" you might get one that only leaks 5%.
Update ... I went back and looked at old threads when the ruffled leaking leaf spring issue first got attention ... and you were in all of those threads trying to justify internal leakage even back then. That was almost an entire year ago (Sep 2024)! How long is your crusade for leaky leaf springs justification going to go on?
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