K&n Filter Replacement?

[Goliath]

hmm might give it a go seeming its fairly harmless on the wallet. Doubt I would feel any difference running stock tune, but I'd know it was there haha.

Thanks for the responses guys.

[bjc]

My old XR was comfortably marking 340rwkw with the factory filter and airbox. With the airbox lid lifted for a run (no filter) it made no improvement. But in saying this I have heard people experience gains running a factory tune and airbox with K&N.

Benny.

that's funny as I have seen on multiple cars the reasonable gain in both low end torque and hp due to less restriction of the stock air filter and box. The turbo spools quicker making more boost down low and although its not a massive gain it is free! This was also noticable with my rapids big intake system, removing the cone style K&N filter the car came on boost about 300rpm earlier giving an increase in torque.

Free hp is good hp.

[Black_S15]

bit of a thread hi jack

but from what ive gathered, the K&N filters are alot less restrictive then the factory thick ford filters, this will mean more air entering the turbo, but the stock tune will still be using the same amount of fuel... does this mean a less restictive filter will make the car run lean? is a retune required when changing to a less restrictive filter or a POD?

[Impellor]

bit of a thread hi jack

but from what ive gathered, the K&N filters are alot less restrictive then the factory thick ford filters, this will mean more air entering the turbo, but the stock tune will still be using the same amount of fuel... does this mean a less restictive filter will make the car run lean? is a retune required when changing to a less restrictive filter or a POD?

No retune required. The factory ECU has this all under control. However, to gain the best outcome with a K&N filter, improving cold air intake into the factory box will improve throttle response. I personally have 150mm alloy ducting ( pop riveted in lower section of air box) running to the headlight, and definned both upper and lower air box sections (internal fins designed to create turbulence, therefore to reduce induction noise). Car spools nice from around 1800rpm, were as before it was around 2300rpm. I should also add that this was done in conjuction with port and polishing crossover, and wrapping intake piping with aluminium tape. Cheers

Edited 21/05/12 09:28 PM by Impellor

[broke]

No retune required. The factory ECU has this all under control. However, to gain the best outcome with a K&N filter, improving cold air intake into the factory box will improve throttle response. I personally have 150mm alloy ducting ( pop riveted in lower section of air box) running to the headlight, and definned both upper and lower air box sections (internal fins designed to create turbulence, therefore to reduce induction noise). Car spools nice from around 1800rpm, were as before it was around 2300rpm. I should also add that this was done in conjuction with port and polishing crossover, and wrapping intake piping with aluminium tape. Cheers

been thinking of modding the stock box recently when I throw a K&N in there. thinking a largish hole in the bottom or the side right hand side (that sits next to the front quarter panel.) would like some more noise. will probably screw some kind of mesh over the hole just to stop any debris from somehow making it's way in the box. good to know that it's worth while.

[stroller]

Yeah I've got a k&n panel filter in stock box with a few 100mm holes drilled underneath and infront

[XR6menace]

Congrats mate...

Edited 22/05/12 06:28 AM by dazzler

[stroller]

lol at pointless comment^