There isn't a difference because a dyno cannot simulate real driving conditions when it comes to wind. Those fans cannot simulate the same force being applied at 120+mph, therefore we cannot determine if it will make a difference or not.

My point was not to prove that there is a gain by removing the filters. My point was that there might be a gain by changing to a different type of drop in filter like blitz dry filter or a gauze air filter.

 

even still, i doubt there will be a difference. i plan on testing this out next time i go to the track, see if it affects my trap speed at all, but don't hold ur breath, the track doesn't reopen till feb

and if there is only a difference at 120+, i'll stick to the suprerior filtering of my oem filter, rather than gaining half a horse power at 120+ along with a **** load of dust (i live on a gravel road)

no filter will flow better than any filter, so if u don't gain anything by taking out the filter, ur not gonna gain anything with any "hiflow" filter. have u looked at ur stock filters? if not, pull them out and take a look, they're not ur typical one inch thick oem filter that u find in ur moms camry (but don't get the impression the the basis of my argument is based on how the filter looks)

 

I tried this when I went to LACR a few months ago when they were open. I was a bit nervous going down the 1/4 mile with no filters because anything can go in the intake and LACR isn't the cleanest track in the U.S. I did notice a improvement but low end you will notice a bit of lag. Once you are done with first gear you will only feel a gain with no filters, it's not much but it's enough to feel especially on a cold night.


The flow rates of the aftermarket filters are much greater than OEM, that's the only reason I would upgrade the filter. The best alternative is no filter yes, but it's the most dangerous. Since we can't drive around with no filter we can substitute the OEM restrictive for a free flowing. Try doing a CFM test on the OEM filter and a blitz or gauze type, you'll be surprised. The OEM might "look" great, but it's main purpose is for filtering and not for performance.

 

That'll be a problem even with the stock airboxes. Ever pull the filter out after driving the car for a while and slide your hand in? It's quite warm in there.

 

did u notice a difference in trap speed, trap speed is the only true dyno, higher trap=higher power


what i'm saying is that if there isn't a difference between oem filter and no filter, there wouldn't be a difference with any aftermarket filter either, does blitz even make drop in filters? as far as i know, there isn't a drop in filter available for the 07's yet, not even k&n

 

i know, but the this would be amplified with this poor excuse of a heat shield

this is why my traps can vary from 100 to 103 in the same night within 20 mins of each other

 

I only got one run, I didn't notice a big change in trap speed as in 1mph or higher because it didn't add that much power.

If there's no difference then it just means OEM is the best. Once your OEM filters are dirty and need to be replaced you might as well switch to aftermarket if they will flow more right? Makes sense.

This is why I still run OEM intake.

 

from all the test i've seen, oem filters do the "filtering" job much better than aftermarket ones, the only aftermarket filter i've seen that does a good job is the apexi one, and they only make conical filters.

if it comes down to keeping the stock air box, mine is only gonna see oem filters

the last 11 (counting this one) post are me, 97supratt, and vitviper. we are taking over!!! muahahahahaha

 

HR - Human Resources? LOL

 

I don't change my oil enough to run a gauze filter. The paper filters used by manufacturers are WAYY better about keeping **** out of your oil,and frankly 5 hp isn't worth it to me. I'd rather spend the few hundred $$ somewhere else.

 

fixed

 

Drop in filters are like $35 bucks each.

 

Synthetic oil and a filter is $40. Over 10k miles I'd be adding 1.5 oil changes. I change every 5k now, would change every 3k with those filters. Thats $50 every 10k miles all for a couple horsepower. Not to mention I don't have time to DIY every change, so potentially a lot more.