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 Post subject: Bypass oil filters
PostPosted: Fri May 21, 2010 11:51 am 
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Quad T88
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Anyone used or know much about these?

They run off a secondary circuit to primary oil circuit so doesn't affect flow or anything. From what i gather it'd run out of a sensor hole and feed back up the top somewhere.

Sounds like a good idea in therory, wondering if anyone had heard bad or good?

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PostPosted: Fri May 21, 2010 8:01 pm 
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TO4

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Car: 200sx S14.5
the only oil bypass i know is all factory fitted
for safety reasons ofcourse

im not sure what you're talking about or what you're trying to achieve


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PostPosted: Sun May 23, 2010 12:02 pm 
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the bypass is in the filer itself. basically,when they get blocked because you haven't changed it for way longer than after it should have been done,they build up internal pressure,and stop filtering the oil.

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PostPosted: Sun May 23, 2010 6:56 pm 
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TO4

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true in some cases

some motors dont have a bypass in the oil filter but have an external one
this is why you should use the correct filter all the time, because if you use a non bypass filter with a motor without external bypass, you could be in a world of shit


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PostPosted: Tue May 25, 2010 12:36 pm 
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Quad T88
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I probably should've gone into more detail.

What I'm talking about is a secondary filtration system, that works with the normal filter, with a much finer filter. It filters out the impurities that the normal filter cannot, thus the oil maintains it's viscosity and stays cleaner for longer.

Apparently in a normal car you'll get 30k from an oil change with changing the bypass filter every 5k. I thought it'd be benifitial in a performance setup.

So I want to know if they don't get used because they're crap or because no one's heard of them.

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PostPosted: Tue May 25, 2010 5:07 pm 
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do you really need to get all that extra life from a throw-away $10 part?

especially when it will cost you money to do it,and involves modifying the lubrication system?


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PostPosted: Tue May 25, 2010 5:34 pm 
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Quad T04
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I was thinking the same:

Plusses:
Don't change your oil as much.

Minuses:
Extra complexity
Extra weight
Extra cost
Less space in the engine bay

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PostPosted: Tue May 25, 2010 6:45 pm 
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TO4

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Car: 200sx S14.5
its not the impurities in the oil that require the changing of it (well it is, but it's not the main reason)

the main reason is because the oil gets superheated and cooled and heated and cooled, and this process breaks the oil down

and i think in a high performance system, a more finer filter might increase oil pressure too much?

hmm, not my cup of tea thats for sure!


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PostPosted: Tue May 25, 2010 7:22 pm 
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Takumi
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diesel engines usually have two filter elements.
One is full flow, and one is a finer one with partial flow.

It's a bit more necessary due to the extra carbon that ends up in the oil on a diesel.

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PostPosted: Wed May 26, 2010 1:19 pm 
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Quad T88
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As time goes by, it becomes ever clearer that dumhed is the only person who knows stuff.

fergo308 wrote:
do you really need to get all that extra life from a throw-away $10 part?

Did you read my post? It has nothing to do with extending the life of the standard filter. It works in conjunction with the standard filter. Don't quote me, but i think i recall hearing the standard filter is about 16micron, whereas the bypass is 2micron. It's about running better oil.

rk2k9 wrote:
and i think in a high performance system, a more finer filter might increase oil pressure too much?

Again, twice i have said it works on a secondary circuit to the primary oil circuit. Thus it does not affect flow at all. I have held ony of these bypass filters in my hand and the fittings are actually restricted so to not draw to much oil and not affect pressure. It filters the oil slowly.


I was looking for knowledge of actually facts if they're good or bad, not of the theory.

They are used in diesel engines due to their nature, and with a petrol engine, maybe not nessercery but could be benifitial, especially the work out the oil gets with track use and such.

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PostPosted: Wed May 26, 2010 5:14 pm 
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I did read your post,and I fail to see the point of going to that much trouble to fix something that isn't broken.

If you'll sleep better at night knowing that your oil is getting finer filtration between changes and that you MIGHT get a few extra thousand km of life out of it over a decade or so,than that's great,and go for it.
Personally,and judging from the majority of posts contained within this thread so far,it's a waste of time,money and effort.


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PostPosted: Fri May 28, 2010 12:11 pm 
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Quad T88
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The oil is the most important part of any motor. Probably shouldn't bother wasting my time here(as seems to be the case with a lot of people). Just thought some old farts might know something about this.

Again, I'm not interested in your opinion of the therory, it works, it's worked for a long time. I wanted to know if they don't get used beacuse they're shit or unknown.

Thus I have found my answer, thankyou nublets

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PostPosted: Fri May 28, 2010 5:27 pm 
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sik thread, shame its over.

See you in the for sale section magnub.

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PostPosted: Fri Jun 04, 2010 6:16 pm 
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very narrow view fergo. it was a good question considering retail on 6L of a good full synth is over $70, if it prolongs the life, its worth more than just a $10 part

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