You would just need to change filter more often.Quote:
Originally Posted by paulyg
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You would just need to change filter more often.Quote:
Originally Posted by paulyg
I just do mine with every 5k oil change. Regardless of how dirty it is.
Some good info here Pages 67-76 , and not just on filters
http://www.nissanpatrol.com.au/forum...rence-Document
http://www.nissanpatrol.com.au/forum...ghlight=filter
This thread explains why a k&n is better especially when used in the zd30 style airbox.
While there are some good opinions in that thread there's nothing that would convince me to use one, I rather look at the stats in the comparison I posted, I would be more inclined to go off these then opinions but that's just me.
The main advantage that k&n have is the saving long term in maintenance
Can you post up a screen shot or something? Having trouble opening that link.
And they arent opinions it's logic plain and simple. Oldmav has done real world testing of this even using high end laboratory equipment for his results. Plus his qualification should be enough lol
I'll try but there's a few pages lol
Once a paper element gets past 4m/sec its ability to filter is greatly diminished. A zd30 will easily see 12-14m/sec under acceleration and at this point the element inside the zd airbox can allow particles of up to 80 micron past. Now the k&n filters down to about 7 micron but will still do that at airspeeds of 14m/sec
Let me know if you can see enough..1st 3 pages
That old chest nut lol. Have a look at the graphs and how they are setout. Even by those graphs every filter they tested was within 3% of each other. Then there is the fact the test was done by ac delco so of course its gonna reflect better on them. Have a look at how much restriction the ac delco has though compared to the rest. Like I said paper elements do work good but the need the right system to do so. That test doesnt really give you enough information to make a good decision. There are no air speeds posted. What happens when the filter restriction gets beyond 10in h20? I can gurantee you the zd airbox design will see above that much restriction for a lot of a zds driving cycle not to mention the air speeds being right up there as well. They also dont give you mention of the size of the particles that have been passed through the element.
You can have particles enter the engine if they are less than 10 micron and it wont cause any ill effects as it is so small it is lost in combustion. There really are so many more bases that the above test needed to cover to be informative
In a zd30 type induction system a k&n will filter better than any paper element.