How good is KNN Air filter?
- Thread starter Leean
- Start date
opvaulet
Well-Known Member
TripleM,
Hi,
Visitor from e34 forum (classics)
Did you get a power gain with the ITG. how would you rate its filtration properties? Was yours a drop in fitment and where can one buy this? My K&N seems to work really well, but some people are worried about filtration and oil on the MAP sensors.
Hi,
Visitor from e34 forum (classics)
Did you get a power gain with the ITG. how would you rate its filtration properties? Was yours a drop in fitment and where can one buy this? My K&N seems to work really well, but some people are worried about filtration and oil on the MAP sensors.
I'm currently driving the E46 3.18. Actually its not for the performance but for the sound :twisted: the valvetronic engine makes a whirring noise (I think some forumers call it the taxi sound 
) during moving off. Was hoping to make it more of a growl 
Just came across this report on the net, so still considering my options :thinking:
http://www.bmwe34.net/E34main/Upgrade/Air_filter.htm
) during moving off. Was hoping to make it more of a growl Just came across this report on the net, so still considering my options :thinking:
http://www.bmwe34.net/E34main/Upgrade/Air_filter.htm
Re: How good is !@#@!)#&!@#@!)#&!@#@!)#& Air filter?
I just did mine today with a K&N Filter although what i did was slightly different.
Mine looks kinda like that
The engine bay with the metal tubing going down..
The front bar with the filter
THe front bar with the filter2
Must smoother upward revving... although i could be insinuating.. and definitely punchier above 4500rpms..
Only very worried about water ingestion now.. or hydro locking...
I just did mine today with a K&N Filter although what i did was slightly different.
Mine looks kinda like that
The engine bay with the metal tubing going down..
The front bar with the filter
THe front bar with the filter2
Must smoother upward revving... although i could be insinuating.. and definitely punchier above 4500rpms..
Only very worried about water ingestion now.. or hydro locking...
Whisky_Tango
Core Group Members
Re: How good is KNN Air filter?
Well from wat I read, most felt tat their low end improved. Same for me.
I had given my feeback sometime back and there was a comparison of filters.
Hope I can find it and paste it here.
Cheers!
Well from wat I read, most felt tat their low end improved. Same for me.
I had given my feeback sometime back and there was a comparison of filters.
Hope I can find it and paste it here.
Cheers!
Whisky_Tango
Core Group Members
Re: How good is KNN Air filter?
As long as the flow is better than stock, means more air correct?
So more air means more fuel usually, because the MAF (air sensor) detects the air density and so naturally ECU will govern more fuel. This is general concept for discussion purposes.
Unless you can datalogged your ECU and from there you can tell if its economical.
Found the thread and thanx to Ryan for putting it in the correct folder.
http://www.bmw-sg.com/forums/showthread.php?t=1910
Cheers!
silky6 said:
As long as the flow is better than stock, means more air correct?
So more air means more fuel usually, because the MAF (air sensor) detects the air density and so naturally ECU will govern more fuel. This is general concept for discussion purposes.
Unless you can datalogged your ECU and from there you can tell if its economical.
Found the thread and thanx to Ryan for putting it in the correct folder.
http://www.bmw-sg.com/forums/showthread.php?t=1910
Cheers!
reardriven
Well-Known Member
Re: How good is KNN Air filter?
In most cases, the more major determinant of airflow would be the airbox design of the car. The difference between air filter panels from a performance perspective is negligible.
Some of the things to look out for in your stock airbox assembly and/or DIY CAI are:
- acute bends in the plumbing
- convoluted hoses: these should be avoided because the "accordian" like inner surface will reduce flow velocity and cause turbulence
- where you locate the mouth of the feeder hose in a CAI is very important; avoid low pressure under bonnet areas; if possible should be placed directly incident to airflow
- use of a stack or bell-mouth is encouraged; if you notice, original airboxes usually have bell mouths inside them where the intake hole is.
....just my 2 cents
In most cases, the more major determinant of airflow would be the airbox design of the car. The difference between air filter panels from a performance perspective is negligible.
Some of the things to look out for in your stock airbox assembly and/or DIY CAI are:
- acute bends in the plumbing
- convoluted hoses: these should be avoided because the "accordian" like inner surface will reduce flow velocity and cause turbulence
- where you locate the mouth of the feeder hose in a CAI is very important; avoid low pressure under bonnet areas; if possible should be placed directly incident to airflow
- use of a stack or bell-mouth is encouraged; if you notice, original airboxes usually have bell mouths inside them where the intake hole is.
....just my 2 cents
Re: How good is KNN Air filter?
Thanks a lot for finding the thread and the explanation! Datalogged ECU seems v chim esp 2 a newbie like me haha coz thinking of some minor mods to my car to improve low end torque. Does the Fc increases a lot? Thanks again!
Whisky_Tango said:
Thanks a lot for finding the thread and the explanation! Datalogged ECU seems v chim esp 2 a newbie like me haha coz thinking of some minor mods to my car to improve low end torque. Does the Fc increases a lot? Thanks again!
