Originally Posted By: MuzzleFlash40
Originally Posted By: sayjac
Quote:
I believe that the silver is rated at %80. The proselect has the same media but less of it.
80% at what micron level? Without both parts of the efficiency equation, percent and micron level, efficiency can not be accurately stated. And how do we know Silver and PS use the same media, is there some reference that says that? Or is it an eyeball determination?
As for the topic, the 1372 (51372 Wix) is the Wix/Napa Gold equivalent of the Motorcraft FL820S. And for whatever reason or reasons is one of the minority Wix/NG filters using dome end bypass. So the answer to the question I posed above back in 2012 is no, not all Wix/NG's use dome end bypass. Still majority thread end bypass. And apparently the very short lived silicone combo valve experiment on this Wix/NG application is long gone.
That is what was told to me by the manager of our local napa. That was explained to him when he went to a training session last year for their filters. Beyond that I have no idea.
So for my application it does not have the combo valve?
Due respect to the manager, but again for efficiency, 80% without a micron level is essentially meaningless. Not that I would necessarily let that lack of information keep me from using one. But if for example it's 80%@20um, that wouldn't be very good. As for PS media, maybe it is the same as Silver but less of it, just wondering the source of that information.
Not sure of your application, but if it's said x1372 in either the Silver or the PS based on the pics I would say it uses a 'nitrile' combo valve. I was referring the Wix/Napa Gold 51372 application as not using a "silicone" combo valve as the MCFL820S comparo linked above indicated. If the "silicone" combo valve was accurate that is the only combo valve not nitrile I've seen. But as shown here, even if Wix did try it they abandoned the idea in favor of the current dome end bypass.
There are some Silver and PS that still use the Wix traditional separate thread end bypass. But many use the nitrile combo valve as shown in the pics above.