115.00 each, compared to 43 for the KN. Is there an advantage one over the other? http://www.carobu.com/catalog/html/360_air_0.html reply i got from Carobu: Yes there is a difference. First, these were designed and tested on an actual Ferrari, something that K&N doesn’t do – They just use their standard material and cut to fit. The Tubi filter doesn’t require oiling which can damage O2 sensors. Also, Tubi Filters are exclusive to Ferrari; K&Ns are used on Chevys, etc. I guess this all involves choice – you could be driving a Corvette convertible, but you aren’t. Let me know if you are still interested. Regards,
Stick with the stock filters....I have used K&N on a couple Ferraris in the past...no real gains, just a bit more intake noise.
Sorry about that then. My bad. Your product can't be that good when your big selling point is "Tubi Filters are exclusive to Ferrari; K&Ns are used on Chevys, etc." I have a K&N but I have to agree with 355, there isn't much difference. You can definitely hear the intake more. When I get on the gas I can hear it sucking air into the motor. Kind of fun but not a real noticeable performance improvement. Then again, how wrong can you go for $43?
thanks for the feedback. Anyone ever used these filters? the issue with KN is they are pre-oiled type filers and these look to be paper and none oiled. Im real curious if that means better flow
There is an objective test of the available filters here.... http://home.stny.rr.com/jbplock/ISO5011/SPICER.htm What you will find it that oiled gauze filters like the K&N have a bit less initial restriction, but pass a lot more crap thru the filter and actually clog up faster than a well designed paper filter. If you want to keep your engine for a long time I would suggest that you skip the K&N and keep a paper element in there... So far as I know there are no OEM's using a K&N type filter. That has to tell you something. Also remember that filter restiction has no effect at anything less than wide open throttle, so you are sucking in a lot of junk into your engine to gain a few (like 1 or 2) horsepower at full throttle. Not really worth the effort.
Interesting link, thanks for the post. In those test is would appear that you are correct. The one caveat I would note is that the statement that for a truck motor the flow differential isn't significant. Truck motors don't rev very high and they don't rev fast either. I suspect that paper may be better is a true statement if you are just running around the streets. If your are on the track, probably different results. Baseless opinion -- The less restrictive filter will give you better throttle response because you don't lower the plenum pressure as much so more air & gas at first push on the throttle. You may pay for that with higher particulate levels. For what it is worth, K&N does doe ISO5011 testing for flow, efficiency, power gain, etc. Here is one of the links http://www.knfilters.com/efficiency_testing.htm
We use K&N filters on two 360 Challenge team race cars and Tubi paper type filter on the third team car as per individual driver preference. You will not be able to feel a seat of the pants difference between OEM and aftermarket filters, but eyeballing all the filters K&N sure looks to be the least restrictive. We have not had any problems with oil fouling the air flow meters with K&N filters when we re-oil at end of season. You just have to make sure you follow instruction and oil the correct amount on the up stream side of the filter.
"Also, Tubi Filters are exclusive to Ferrari; K&Ns are used on Chevys, etc." That statement alone would make me not even consider these filters!
Pressure differential is pressure differential. It really doesn't matter if you have a diesel truck engine pulling against it or a 4 cam v12. What you want is airflow versus pressure drop as shown in the restriction versus SFCM chart. K&N is claiming 96 to 99% filter efficiency. That is actually really bad. A bad filter is 97% efficient. A good filter is on the order of 99.7%. or to look at it another way, the best K&N at 99% is passing three times as much crap into your engine as a good filter and 10 times as much at the best filters. As a worst case it is passing almost 30 times as much dirt... While in theory you should have better throttle response from less restriction, the restriction upstream of the throttle body is pretty small (std day pressure is 406 inches of water, and in this case we are talking about an inch or so of pressure drop at lower throttle settings) so the impact is going to be less than 1/4 of 1% in power between a really bad filter and no filter at all. In a practical sense, you are looking at the difference of less than half of that or 1/8 of 1%. I sincerely doubt that you could ever feel that. In terms of max power the K&N will give you a bit more, the delta is on the order of 1/2 of 1% in pressure drop, or, for a 300hp engine you are looking at about 1.5 hp. Not really worth it..
Straight to the point. QUOTE=cwwhk;137905920]We use K&N filters on two 360 Challenge team race cars and Tubi paper type filter on the third team car as per individual driver preference. You will not be able to feel a seat of the pants difference between OEM and aftermarket filters, but eyeballing all the filters K&N sure looks to be the least restrictive. We have not had any problems with oil fouling the air flow meters with K&N filters when we re-oil at end of season. You just have to make sure you follow instruction and oil the correct amount on the up stream side of the filter.[/QUOTE]
