K&N Air Filter

[MY95]

What does everyone think of the K&N air filter, Is it worth using one of these over a standard Peueot one? How does the performance and longevity differ to the standard air filter?
Thanks

[ginge191]

With a DERV; air filters are fairly generic. The bigger the better has always been my call, and often seen the cheaper ebay jobbies are the biggest and often the best. Then again, others enjoy a nice brand on a filter.

[cully]

standard panel is more than capable of passing enough air on a stg 1 tune
i wouldnt bother with the messing of washing and oiling the filter as the std filters are cheap and dont feck up the MAF sensor

[Dum-Dum]

They are good and will flow more but the standard one isn't really a restriction. Also as cully says the oil on the filter can get sucked in and damage the MAF sensor. The reason most people change them is not being able to fit the standard air box with a FMIC.

[lolsteve]

I had a universal jobby on mine and while it did sound a lil grunty on the lower rpm range it no doubt didn't do the intake temps any favours since I didn't hook up a cold air feed

[MY95]

[quote='ginge191' pid='306707' dateline='1375434792']
With a DERV; air filters are fairly generic. The bigger the better has always been my call, and often seen the cheaper ebay jobbies are the biggest and often the best. Then again, others enjoy a nice brand on a filter.
[/q


Thanks for the reply, so I guess you use the standard air filter? Purflux isn't it?

[procta]

I have bought an ITG filter, its better than the K&N one, I found that the car responds better and noticed a little more pull up top end.

[MY95]

I had a universal jobby on mine and while it did sound a lil grunty on the lower rpm range it no doubt didn't do the intake temps any favours since I didn't hook up a cold air feed

Ah, thanks for passing on your experience!

---

They are good and will flow more but the standard one isn't really a restriction. Also as cully says the oil on the filter can get sucked in and damage the MAF sensor. The reason most people change them is not being able to fit the standard air box with a FMIC.

Ok thanks again dum-dum, so you would advise just sticking with a standard purflux one?

[ginge191]

With a DERV; air filters are fairly generic. The bigger the better has always been my call, and often seen the cheaper ebay jobbies are the biggest and often the best. Then again, others enjoy a nice brand on a filter.

Thanks for the reply, so I guess you use the standard air filter? Purflux isn't it?

I don't have a HDi, i run a DT with no filter .. not the best but meh, the noise and spool is epic

[Dum-Dum]

They are good and will flow more but the standard one isn't really a restriction. Also as cully says the oil on the filter can get sucked in and damage the MAF sensor. The reason most people change them is not being able to fit the standard air box with a FMIC.

Ok thanks again dum-dum, so you would advise just sticking with a standard purflux one?

Yeah Its probably best as aftermarket "induction kits" get terrible heat soak, like on a 10*C day the standard system will be about 10*C at the MAF but with a induction kit it'll be 30-40*C

With a DERV; air filters are fairly generic. The bigger the better has always been my call, and often seen the cheaper ebay jobbies are the biggest and often the best. Then again, others enjoy a nice brand on a filter.

Thanks for the reply, so I guess you use the standard air filter? Purflux isn't it?

I don't have a HDi, i run a DT with no filter .. not the best but meh, the noise and spool is epic

Cant believe your still condoning this after what happened t Max's turbo.

No filter is a good recipe for destroying turbos in just a few thousand miles and on the HDi it'll also destroy many many MAF sensors.

[ginge191]

Cant believe your still condoning this after what happened t Max's turbo.

[Poodle]

Lol...

Tbh after market filters are pretty much a waste of money imo, unless you just want the noise or need room in the bay. They're much more likely to do harm than good, anything costing less than a ton can be safely allocated to the same category as fuel magnets and electric turbos.

[Piggy]

just watch the pod filter mythbuster on mightcarmods...

shows that manufacturers do spend time developing an air box for a reason!

[KevinTW]

just watch the pod filter mythbuster on mightcarmods...

shows that manufacturers do spend time developing an air box for a reason!

I put a K&N in the airbox of my HDI. The standard filter was 3 months old so still clean. 2 mpg more and better acceleration. I think they are great.

[Mattcheese31]

just watch the pod filter mythbuster on mightcarmods...

shows that manufacturers do spend time developing an air box for a reason!

i watched that and tbh i don't think it was very scientific, an air filter coming out the morrete is going to produce lower charge temps on the road, not in a garage though . .

[Arron]

When my car last went on the rollers it pulled 1hp less with the filter off. We put the filter back on and it pulled the same as the first run. Although I dont trust them rollers

I run a hks mushroom filter. It makes a sweet whistle on boost. The inlet diameter is 101mm. The filter is foam like and can be bought for 12 pound as and when needed. But I think it does ruin maf sensors.

The stock airbox modded should be fine tho

[KevinTW]

When my car last went on the rollers it pulled 1hp less with the filter off. We put the filter back on and it pulled the same as the first run. Although I dont trust them rollers

I run a hks mushroom filter. It makes a sweet whistle on boost. The inlet diameter is 101mm. The filter is foam like and can be bought for 12 pound as and when needed. But I think it does ruin maf sensors.

The stock airbox modded should be fine tho

Thanks Arron. I have had K&N air filers since 1988 in various Capris,a 106 diesel 1.4, a 405 1.9d,an Alfa Sprint Cloverleaf and a Stihl saw although for very different reasons. I have always thought they were great.