We have been conducting some test on several cars using back to back dyno runs using alot of different filters, on both a 346 Supercharged car and a Turbo Honda.

What we have found has been pretty surprising so far...some results are not what you would think!


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">

Green Line - 2 Window Screens on a 45 to one another. This gave us the lowest boost and the least power.

Middle Red - Stock ATI Little filter for an 04 GTO (Very limited room)

Purple Line - One Window Screen. Little bit more boost then the stock filter, with minimal gains for the safety given up.

Top Red Line - No filter at all...The most boost and most power.




This is a picture of the stock air filter and the two screens. We have a MUCH larger air filter we will be installing some time next week and we will report the results.


I should note, the car is an 04 GTO with a mild cam, P1SC, LTs, Full Exhaust and other supporting mods. </TD></TR></TABLE>


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">In this test, we used a Turbo B16...50trim, AEM, custom ramhorn A/C manifold.



Bottom Red Line - Red fluffy K&N filter with a LARGE wire backing. Lowest HP &lt;225hp

Lower Red Line - Window Screen 271hp

Blue Line - NO Filter 278hp

Green Line - AEM Dry Flow Intake 280hp



These are the three filters used in this test...The AEM Dry Flow on the left, Window Screen in the center and K&N on the right.

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Anyone have any track times or dyno runs of back to back filters?


We are interested in learning more and gathering more data.

 

Excellent test. Confirmed what I've thought all along.

Thanks for putting in the time and effort to let us all know.

 

Very interesting, I wonder how a K&N Dry style filter would do.

 

Interesting. I'd like to see numbers from a K&N filter that's of similar size to the Dry Flow AEM, or maybe a "regular" oiled AEM filter.

 

Nice work.

 

glad to see tests like this. but i think tests like this are also subject to variances and the results may not be the same for everyone. people have reported running no screen or just a screen has resulted in lost hp. something to do with surface area of the filter and/or where the filter/turbo is located in regards to air flow.

 

Yeah, this is something we would also like to test...hopefully we can round up a couple of name brand air filters and re-test again.

If we were to do a test like that, what filters would you like to see tested?


HKS
AEM dry
AEM Oiled
K&N dry
K&N oiled
??

 

We have tested K&N filters (similar to the one shown below) on 300whp - 530whp setups. All of them showed 4whp - 6whp loss when taken off

 

so that aem dry flow showed some gains huh? im thinking about rocking one of those when i go turbo

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alpha &raquo;</TD></TR><TR><TD CLASS="quote">We have tested K&N filters (similar to the one shown below) on 300whp - 530whp setups. All of them showed 4whp - 6whp loss when taken off

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Very cool results!

 

wanna see more results on this. seems the no filter works for the LS1 but anymore testing been done on turbo hondas besides Alpha's and Carters tests?

not gonna subject my turbo to a screen only but the filter seems really restrictive based on CarterRace's testing

 

haha, air filters. What's that?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by agrn93ls &raquo;</TD></TR><TR><TD CLASS="quote">
not gonna subject my turbo to a screen only but the filter seems really restrictive based on CarterRace's testing</TD></TR></TABLE>


I may have been confusing in my first post, but in fact the AEM Air Filter made MORE power then NO filter!! The screen is the WORST of them...the AEM Filter picked up 2hp over NO filter and 60+ over the K&N foam!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CarterRace.com &raquo;</TD></TR><TR><TD CLASS="quote">Yeah, this is something we would also like to test...hopefully we can round up a couple of name brand air filters and re-test again.

If we were to do a test like that, what filters would you like to see tested?


HKS
AEM dry
AEM Oiled
K&N dry
K&N oiled
??

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i wanna see RS akimotor tested

 

awesome test ....i wonder how the apexi filters would do

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18Flip &raquo;</TD></TR><TR><TD CLASS="quote">awesome test ....i wonder how the apexi filters would do </TD></TR></TABLE>

bump cuz i got one

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18Flip &raquo;</TD></TR><TR><TD CLASS="quote">awesome test ....i wonder how the apexi filters would do </TD></TR></TABLE>

I've always wondered this too. I'm curious if the velocity stack really does anything to enhance the filters efficency.

 

I've always said a decent sized filter will not loose more than a few hp over no filter at all, and that screens suck on anything less than 4" diameter.

 

i'd really like to see the apexi and r/s akimoto filters in there as they both have velocity stacks integrated vs. the generic k&n style and no filter. also screen door style mounted on a velocity stack maybe? anyways, cool results!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by I3iggy &raquo;</TD></TR><TR><TD CLASS="quote">i'd really like to see the apexi and r/s akimoto filters in there as they both have velocity stacks integrated vs. the generic k&n style and no filter. also screen door style mounted on a velocity stack maybe? anyways, cool results!</TD></TR></TABLE>

agreed x10

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alpha &raquo;</TD></TR><TR><TD CLASS="quote">We have tested K&N filters (similar to the one shown below) on 300whp - 530whp setups. All of them showed 4whp - 6whp loss when taken off

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I made 3hp less at over 600whp with a properly sized K&N filter on my car than I did with it removed. Close enough for me to keep it on there always.

 

Where was the filter placed during all of the tests? Right on the compressor?

 

very interesting

 

Bump for a interesting test

 

I want to see how a regular k&n oiled filter does with the test.