Which air filter should I get? Are they about the same performance wise? Or should I just stick with the stock filter?
K&N or Spectre
- Thread starter 87MK111Supra
- Start date
Neither. Get an Apexi or an AEM Dryflow.
Here's some reading material for you: http://www.mkiv.com/techarticles/filters_test/2/
Here's some reading material for you: http://www.mkiv.com/techarticles/filters_test/2/
agreed any dryflow filter is much better than oil soaked K&N or spectre,
i tried the spectre and had a friend completely demoslih his K&N in less than a month
personally i use a Weapon R SW filter for now, hte cage around the filter might rust after a year but the filter wont get ripped apart
i tried the spectre and had a friend completely demoslih his K&N in less than a month
personally i use a Weapon R SW filter for now, hte cage around the filter might rust after a year but the filter wont get ripped apart
I've been running an AEM dryflow in multiple vehicles of mine for over 4 years.
The only time I had to replace it was when one of my Subaru's had a mystery intake backfire that charred the inside of the filter, burning a couple holes in the media. Other than that, they filter incredibly.
My Supra came with an Apex-i, so I was pretty psyched to see that as that's the only intake I'd buy, otherwise I would have made one with an AEM.
The only time I had to replace it was when one of my Subaru's had a mystery intake backfire that charred the inside of the filter, burning a couple holes in the media. Other than that, they filter incredibly.
My Supra came with an Apex-i, so I was pretty psyched to see that as that's the only intake I'd buy, otherwise I would have made one with an AEM.
I think k&n is fine. I run one in my 85 yoty pickup its used only for wheeling it holds up great. Iv had it extremely dirty just cleaned it up still working great filters very well. If any one tears up a k&n its user error. I personaly don't like specter but if you live in the city where theirs not much dust then I'm sure its fine.
How exactly do you measure 'filters very well'?87GWSupra;1525281 said:
There is research available that shows K&N filters do *not* work very well. If you have contradictory evidence, I'd be very interested to see it.
It's not a very scientific way. But you can look inside your intake or even TB dust can collect in their. With my truck since iv had my k&n iv never had any stick compared to stock replacement where it did and I drive a lot of gravel roads with tons of dust during the summer. So visually it seems to filter well.
87GWSupra;1525861 said:
Visually it doesn't mean much. Send a 3,000 or more mile oil sample to someplace like Blackstone Labs. The silicone levels in your oil will tell you how much dirt is getting in your motor, and the amount of fuel in your oil will indicate how much blowby you've developed by scouring your cylinders with dirt.
There's a reason why my cars with 200,000 +/- miles on them with 8,000 mile oil change intervals are in better shape than many that are at 1/2 that mileage that get 3,000 mile oil changes = science.
I'm not slamming you, just pointing out a better way than the WAG & pray method.
Filter testing done with coarse dust test 5.5 to 176 microns (hair 50 microns) Test proven that particles that cause engine damage are 10 to 20 microns in size. K&N tests come out to 97 to 99% efficient.http://www.knfilters.com/images/factstab2.gif
this is the information i found on the matter. I am interested in other testing to prove if K&N filters as well as they claim.
---------- Post added at 01:18 PM ---------- Previous post was at 01:15 PM ----------
not all blow by is caused by dirt damage to rings and cylinder walls, mostly caused back lack of lubrication. so saying testing blow by for damage done by dirt is not an accurate test.
this is the information i found on the matter. I am interested in other testing to prove if K&N filters as well as they claim.
---------- Post added at 01:18 PM ---------- Previous post was at 01:15 PM ----------
not all blow by is caused by dirt damage to rings and cylinder walls, mostly caused back lack of lubrication. so saying testing blow by for damage done by dirt is not an accurate test.
http://www.bobistheoilguy.com/airfilter/airtest3.htm
Edit: couldnt find the other one where they tested all the filters for our car but i seem to remember that k&n and hks were dead last.
Edit: couldnt find the other one where they tested all the filters for our car but i seem to remember that k&n and hks were dead last.
Blowby coupled with high silicon content is an indication of poor filtration. However, it's your car - run a dirty sock on it if you want.
http://www.mkiv.com/techarticles/filters_test/2/
there you go hvy. there is the test of the popular filters.
there you go hvy. there is the test of the popular filters.
