Deutz bypass set at 35psi

[Brio]

They say it keep oil cleaner & thats what there service sch. is based on.

PS how do you spell luberefine oil filters

[ March 09, 2004, 01:33 PM: Message edited by: Brio ]

 

[dickwells]

They should know what their filters can take before the element collapses, so more power to them. The bypass is only there to keep the filter paper from breaking up and getting out into the system. I think Luberfine is the spelling.

 

[TC]

"The bypass is only there to keep the filter paper from breaking up and getting out into the system."

...Plus bypassing cold thick oil, plus high-RPM/high flow bypass, plus throttle jab pressure spikes, plus clogged/clogging medias, plus to prevent shell seam leaks/bursts when overpressured.

Some engines, such as some Chevy V-8s, can run as low as 40 psi oil pressure at highway speeds. Some of the older Porsche 911s could be as low as 10 psi at idle. I'm wondering if a 35 psi bypass might possibly interfere with such a low oil pressure range when other filter manufacturers typically adopt 8-22 psi bypass...? Even with 8 psi bypass, if the media flows sufficiently and has sufficient dirt capacity, it will continuously filter just fine with no need for 35 psi to "force" oil through the media. By the way, might you have a link to that Deutz info?

 

[Brio]

TC this is there site http://deutzusa.com/parts/genuine1.html my application is a 2000 triumph 955i wix filter #51358(8psi B-pass) they list other apps as escavators/duetz,kabota's, & KIA Rio's.even tho the next filter up(1/2")is cheaper that would make it 1" longer than stock puting it just at header hight and fear of damage. PS the people on this site are a great help, Luberfine had no hits on web.

[ March 10, 2004, 07:46 AM: Message edited by: Brio ]

 

[Brio]

http://www.luber-finer.com/Web/index.html PH 7015 says honda app. WIXX-ref #51358 says champ & warner are same #'s #51358 doesn't mention honda app.

 

[Alan]

The bypass specs on the filter speced for my 320i is 25 to 35 psi.

I wonder if a lower speced bypass would be more benificial to the engine.The Supertech ST3614 fits the 320i but has a 8-12psi bypass.

[ March 10, 2004, 09:40 AM: Message edited by: Alan ]

 

[TC]

Thanks for the link, Brio. Sure enough, it states "DEUTZ filters have a high relief valve pressure of 35 PSI, which allows the engine to run longer before filter changes." This is an aspect of bypass pressure theory I've never heard before. But it makes sense since it will continue to force oil through the media, over time, even as the filter gradually clogs. But of course, there's trade-offs to everything, and I can't help but think there might be one here as well, especially since the competition typically uses about half that much bypass pressure. Without knowing all the pros/cons of Deutz's philosophy, I do know that a safe route in extending oil drain intervals, if feasible for a given engine, would be to simply go with an oversize filter, rather than follow Deutz's 35 psi route. The stock Purolator filter for many Hondas, for example, is the 14459, while simply switching to the 24458 adds 50% more media, with no need to pump up the bypass pressure for equivalent results. One caveat is that it appears many German cars come OEM with high bypass settings (heard before and confirmed by Alan), and if so, then going 35 psi is a non-issue for those rides -- maybe they even prefer it.

Alan: I suspect that as long as you use a good quality filter and change it regularly, the bypass setting is of only limited significance since under normal circumstances (OTHER than cold start-ups, high RPMs, and throttle jabs), the bypass valve should be closed anyway in your non-clogged filter.

[ March 10, 2004, 07:55 PM: Message edited by: TC ]

 

[gtm245]

Luberfiner is the spelling.