Walmart Filter
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Joined: Oct 2000
Posts: 30,809
Likes: 15
From: Sydney
Yep, that's the one. Perhaps you should read ninegrand's retraction:
And Wortham's K&N is relocated and on an adaptor.
This is how rumours start.
At the time I wrote that it was the K&N filter I thought had the history of coming loose/off. This AM with a clearer head and coffee I knew that it was a mistake (doh) and that the Mobile 1 filter was thought to have a few more issues than the others.
It's good to know that it isn't only the Mobile 1 filter with the potential for a prob and we should all take note. I switched to the K&N after reading about a second M1 filter and went to the K&N.
It's good to know that it isn't only the Mobile 1 filter with the potential for a prob and we should all take note. I switched to the K&N after reading about a second M1 filter and went to the K&N.
This is how rumours start.
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Joined: Nov 2003
Posts: 1,131
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From: Waikele
[QUOTE]Originally posted by Road Rage
No, any filter that is supposed to be applicable to the S2000 will have an anti-drainback, a bypass valve, and so forth. the point is, DO THEY? And do they have the right PSI spec for the bypass? Who knows - I don't, you don't, maybe Wal-Mart doesn't. Champion probably does. But since the bypass spec and the filter media all affect little things like oil pressure and the like, having so many "who knows" adds up to uncertainty, and I do not like uncertainty in an engine of this complexity and cost. Are ya feelin' lucky, my friend?
No, any filter that is supposed to be applicable to the S2000 will have an anti-drainback, a bypass valve, and so forth. the point is, DO THEY? And do they have the right PSI spec for the bypass? Who knows - I don't, you don't, maybe Wal-Mart doesn't. Champion probably does. But since the bypass spec and the filter media all affect little things like oil pressure and the like, having so many "who knows" adds up to uncertainty, and I do not like uncertainty in an engine of this complexity and cost. Are ya feelin' lucky, my friend?
Joined: Jan 2003
Posts: 2,184
Likes: 95
From: Granville OH
Do you know what kind of bypass valve that particular SuperTech filter has? If it has a "clicker type" bypass valve, then I would say absolutely do not use it. If you look down the center "perf" tube of the filter, you should see a small coil spring or a thimble-sized object on the bottom of the filter. If all you see is a flat surface on the bottom with a bunch of circles in the shape of a ring, then it has a clicker-type bypass valve.
Champion Labs makes both types of bypass valves on the filters they make for Walmart under the SuperTech label. The clicker-type does not work the same way as a conventional coil-spring loaded bypass valve works. If you press on the valve to get it to open, nothing happens (blieve me, I've done it). Since the pressure relief valve in the F20C engine is set much higher than other engines (I'm guessing at around 95 psi based on oil pressure readings posted by others on this site), if the filters bypass valve doesn't open, the filter will fail. Failure might be torn filter media, a collapsed center perf tube, a ballooned outer can, or all of the above.
Besides the bypass valve design, I agree with RoadRage's comments regarding Honda's choice to design a filter specifically for the S2000. They did this for a reason, and I'm guessing that it is because they don't want the filter's bypass valve to open up while in VTEC. If your engine never goes above 6000 rpm, then any filter will probably be adequate. But if you're planning to spend a great deal of time up near redline, then in my opinion you might want to stay with a premium filter.
Champion Labs makes both types of bypass valves on the filters they make for Walmart under the SuperTech label. The clicker-type does not work the same way as a conventional coil-spring loaded bypass valve works. If you press on the valve to get it to open, nothing happens (blieve me, I've done it). Since the pressure relief valve in the F20C engine is set much higher than other engines (I'm guessing at around 95 psi based on oil pressure readings posted by others on this site), if the filters bypass valve doesn't open, the filter will fail. Failure might be torn filter media, a collapsed center perf tube, a ballooned outer can, or all of the above.
Besides the bypass valve design, I agree with RoadRage's comments regarding Honda's choice to design a filter specifically for the S2000. They did this for a reason, and I'm guessing that it is because they don't want the filter's bypass valve to open up while in VTEC. If your engine never goes above 6000 rpm, then any filter will probably be adequate. But if you're planning to spend a great deal of time up near redline, then in my opinion you might want to stay with a premium filter.
