surface area of air filter

[geesus69]

does this make a blind bit of difference?

im not talking about standard panel filter, i mean aftermarket induction (cone type)

if you have pipework leading to tb of 70mm ID then all you really need is a filter to cover this? its just looking at the itg/pipercross filters they are mahoosive! whereas the filters you get in an enclosed kit are quite small

does the filter really NEED to be that big?

 

[MRBILLYUK]

In my experience i had a k+n apollo which was way too small imo . It seem to strangle the engine and lost the 5k kick .

I now have a green cone filter ( also a k+n cone ) in a custom enclosure , the surface area of the cone filter is alot bigger than that of the oem panel filter . It definitely hasn't lost any power , still pulls hard and retains the 5k kick .

On the 1*2's i think the thing that determined the size of the oem filter was lack of space in the engine bay .

Just my thoughts anyway .

 

[geesus69]

i would of thought the only thing that could cause the 'strangle' effect would be a very inefficient filter material?

obviously the filter is bigger than the 70mm ID of the pipework, so i cant see there being much of a problem? is the bigger itg/pipercross filter like that to minimise heat soak?

im just playing with ideas here i'm still gonna go ahead with my plan, just wanted some opinions or technical knowledge

if its rubbish i'll just get a ph1 airbox setup

 

[franx]

i think the bigger size of airbox/filterhousing will give a bit of "play" when blipping throttle. think it needs this or it may be too restrictive in means of fast throttleresponse ? With the bigger space there will be a little air-reserve built up for next throttle-opening.