help wive air filters
01 December 2010, 08:07 PM
#2
Are you talking panel filter or induction kit?
What spec is your car, mods etc.
Standard Subaru one is fine. Re useable one is cost effective if you plan keeping the car.
I have the K&N, no issues
What spec is your car, mods etc.
Standard Subaru one is fine. Re useable one is cost effective if you plan keeping the car.
I have the K&N, no issues
01 December 2010, 10:56 PM
#6
Had an hks fitted to my 18g car when i got it.
all i can say is that you might as well put an old sock over the intake
i had to clean my maf and inlet pipes every few weeks to clean the detrius that was caked over everything and stop rough running/overfuelling that occured.
the apexi that i used after that was a much better FILTER with no sign of any cake left behind ,did notice the mid range torque was a little stunted though as its quite a small filter.
the big k&n i have now (no maf on my car) filters & flows really well.
i hate to think how much ****e went through my turbo and engine with the hks pantyhose, i mean filter
all i can say is that you might as well put an old sock over the intake
i had to clean my maf and inlet pipes every few weeks to clean the detrius that was caked over everything and stop rough running/overfuelling that occured.
the apexi that i used after that was a much better FILTER with no sign of any cake left behind ,did notice the mid range torque was a little stunted though as its quite a small filter.
the big k&n i have now (no maf on my car) filters & flows really well.
i hate to think how much ****e went through my turbo and engine with the hks pantyhose, i mean filter
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02 December 2010, 01:54 PM
#9
Do-Luck panel filter apparently gives the most bhp increase for an impreza.. some magazine (may have been banzai or something) did a test a few months ago.
Do-Luck filter is available from sumopower (seach on ebay for best price and results).
Do-Luck filter is available from sumopower (seach on ebay for best price and results).
02 December 2010, 02:26 PM
#10
You will not get 'good bhp' from a cone/IK. Unless you are running a FMIC and wing mounted IK, you will only end up drawing in warm under bonnet air, which will be detrimental to running and performance.
Do-Fukk are sh1te. That magazine 'test' was incomplete and not worth the paper it was printed on.
Valid tests show, the OE airbox is good for 350bhp and beyond.
Fit an OE STi panel and change it every year. Or, buy a KnN panel and clean it once a year to produce optimum results.
I to run a KnN panel filter with zero issues.
Edit: Read this thread. https://www.scoobynet.com/general-te...ction-kit.html
Or this one: http://www.sumopower.com/news/view/8...st-of-the-best
It doesn't mention the most importent factor, filtration abilities.
Valid tests show, the OE airbox is good for 350bhp and beyond.
Fit an OE STi panel and change it every year. Or, buy a KnN panel and clean it once a year to produce optimum results.
I to run a KnN panel filter with zero issues.
Edit: Read this thread. https://www.scoobynet.com/general-te...ction-kit.html
Or this one: http://www.sumopower.com/news/view/8...st-of-the-best
It doesn't mention the most importent factor, filtration abilities.
Last edited by Glowplug; 02 December 2010 at 02:51 PM.
02 December 2010, 08:35 PM
#11
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How do you draw warm air in when there is a grill air scoop on top of the grill which draws the air in which then goes through the wing onto filter.Granted you will get a bit of warm air coming off the engine but it will mostly be air drawn in from the front of the car.Putting the HKS filter on my 02 wrx definitely made a difference to the power and throttle response.
02 December 2010, 08:39 PM
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Had an hks fitted to my 18g car when i got it.
all i can say is that you might as well put an old sock over the intake
i had to clean my maf and inlet pipes every few weeks to clean the detrius that was caked over everything and stop rough running/overfuelling that occured.
the apexi that i used after that was a much better FILTER with no sign of any cake left behind ,did notice the mid range torque was a little stunted though as its quite a small filter.
the big k&n i have now (no maf on my car) filters & flows really well.
i hate to think how much ****e went through my turbo and engine with the hks pantyhose, i mean filter
all i can say is that you might as well put an old sock over the intake
i had to clean my maf and inlet pipes every few weeks to clean the detrius that was caked over everything and stop rough running/overfuelling that occured.
the apexi that i used after that was a much better FILTER with no sign of any cake left behind ,did notice the mid range torque was a little stunted though as its quite a small filter.
the big k&n i have now (no maf on my car) filters & flows really well.
i hate to think how much ****e went through my turbo and engine with the hks pantyhose, i mean filter
02 December 2010, 08:59 PM
#13
Grill=>Air Scoop=>Grill=>Wing=>Filter.
The open bonnet vent will only encourage the heat to rise and try to escape past the IK which is constantly sucking (hot/warm air).
Last edited by Glowplug; 02 December 2010 at 09:00 PM.
02 December 2010, 09:11 PM
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To give me a fair chance of answering a question you could at least ask one that i could make sense of.
Grill=>Air Scoop=>Grill=>Wing=>Filter.
When upto operating temp, the under bonnet temp is well in exess of 80 degrees C. As a none wing mounted IK will sit next to the engine, turbo, up-pipe and directly above the o/s headers, and the heat is always rising the intake temp of the air will be much higher than if drawn through the OE airbox/tract.
The open bonnet vent will only encourage the heat to rise and try to escape past the IK which is constantly sucking (hot/warm air).
Of course it did. If you had done a side by side RR i think you would have more chance of seeing a loss in power rather than any gains.
Grill=>Air Scoop=>Grill=>Wing=>Filter.
When upto operating temp, the under bonnet temp is well in exess of 80 degrees C. As a none wing mounted IK will sit next to the engine, turbo, up-pipe and directly above the o/s headers, and the heat is always rising the intake temp of the air will be much higher than if drawn through the OE airbox/tract.
The open bonnet vent will only encourage the heat to rise and try to escape past the IK which is constantly sucking (hot/warm air).
Of course it did. If you had done a side by side RR i think you would have more chance of seeing a loss in power rather than any gains.
02 December 2010, 09:33 PM
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02 December 2010, 09:51 PM
#18
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I am a qualified technician.
Not Subaru, but BMW.
Long answer here, and there are lots of other factors to consider too.
Under bonnet temperatures, will always be higher than that of the air within the filter housing/tract. It's down to heat convection.
Heated atoms will always be attracted upwards to atoms that are of a lower temperature (heat rising), essentially they are naturally trying to maintain an equilibrium.
This is what happens in the engine bay of a car.
The only way to lessen heat convection is to intruduce a sheild that is relatively sealed away from any chance of heat seeping past (airfilter housing for pannel filters/ well made heat shield for connical filters)
The good thing with the airfilter housing, is that Subaru has kindly crafted a good induction path for cool air to reach the filter.
You would have to buy an expensive cone filter that has it's own specificly designed sheild for your engine bay. Then you have to intruduce a good supply path of cool air for your newly mounted/sealed cone filter.
The expensive filter is only really viable once the pannel filter starts to reach it's maximum tollerances.
Not Subaru, but BMW.
Long answer here, and there are lots of other factors to consider too.
Under bonnet temperatures, will always be higher than that of the air within the filter housing/tract. It's down to heat convection.
Heated atoms will always be attracted upwards to atoms that are of a lower temperature (heat rising), essentially they are naturally trying to maintain an equilibrium.
This is what happens in the engine bay of a car.
The only way to lessen heat convection is to intruduce a sheild that is relatively sealed away from any chance of heat seeping past (airfilter housing for pannel filters/ well made heat shield for connical filters)
The good thing with the airfilter housing, is that Subaru has kindly crafted a good induction path for cool air to reach the filter.
You would have to buy an expensive cone filter that has it's own specificly designed sheild for your engine bay. Then you have to intruduce a good supply path of cool air for your newly mounted/sealed cone filter.
The expensive filter is only really viable once the pannel filter starts to reach it's maximum tollerances.
02 December 2010, 09:55 PM
#19
Not personally, no. But people on here, well trusted people/tuners/mappers have. Just do search.
IIRC the STi came out on top.
We are not talking bhp here. Filtration is first and formost, closely followed by air density/temp. You could fit a pair of stockings over the intake, that would give you maximum flow but fukk all filtration. So a 'happy medium' has to be reached and STi achived that very well by all accounts. I only use KnN for it's longivity, i am under no illussions about the 'claimed' power increases.
03 January 2011, 09:18 PM
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How the fekk can a silly cone filter possibly help? Drawing in all that hot air the turbo is throwing up instead of the sealed factory air box which offers some resistance. Unless your running massive bhp and starving the engine of air (which i seriously doubt) through the size of the air box, it can only make things worse.All the reviews are by people that sell them. Load of to55 they are in my opinion. Leave em to the 18 year old nova boys.
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