Catweazle64

Catweazle64

Member
Afternoon.

Anyone put a K & N air filter in their TD5 and noticed any improvement in performance?

I'm considering the benefit but despite what K &N state at about £46 not sure if it will do much so looking for any real world experience.
 
Got one my highly tuned Defender. Won't make any difference in a standard TD5, makes a bit of difference in a tuned one running high boost. Makes turbo noise a bit louder, other than that not much difference.

Edit sorry mines Pipercross, never read anything good about the K&N ones.
 
Hi, you opened a can of worms with that:cool:...all i can tell(then i'll rest my case) is that i've been using it for 8 years and as long as it's properly serviced the air flow readings are better than with the paper one and it didnt ruin my MAF nor the engine untill now... as about costs, it's cheaper than paper ones cos you can use a service kit at least 10 times ...that's all
 
sierrafery said:
Hi, you opened a can of worms with that:cool:...all i can tell(then i'll rest my case) is that i've been using it for 8 years and as long as it's properly serviced the air flow readings are better than with the paper one and it didnt ruin my MAF nor the engine untill now... as about costs, it's cheaper than paper ones cos you can use a service kit at least 10 times that's all
Click to expand...

Sure it will be just fine in moderate conditions. Might not work so well in an extreme sandy or dusty environment like the Sahel.
 
sierrafery said:
Hi, you opened a can of worms with that:cool:...all i can tell(then i'll rest my case) is that i've been using it for 8 years and as long as it's properly serviced the air flow readings are better than with the paper one and it didnt ruin my MAF nor the engine untill now... as about costs, it's cheaper than paper ones cos you can use a service kit at least 10 times ...that's all
Click to expand...

A K&N filter may, just may improve airflow and give a slight boost to a normally aspirated engine. But will do nothing whatsoever for a turbo engine.
 
wammers said:
A K&N filter may, just may improve airflow and give a slight boost to a normally aspirated engine. But will do nothing whatsoever for a turbo engine.
Click to expand...
The difference is like between a dirty old paper filter and a new one.... I didnt want to have a debate on that but as your statement makes me look like a liar i can tell you that i made comparative measurements just for fun with nanocom on the same road and same conditions and comparing the logs the readings were between 10-20kg/hr higher up to 2500rpm then between 20 to 45kg/hr higher above 2500 untill full load where it reached 649 with K&N and 602 with paper ... also the drop in AAP reading being lower with K&N the MAP reading was a bit higher as the result of that, which is normal as long as you understand what sensors are doing in an electronic management ... believe it or not and what ever you respond i'll rest my case for good now cos based on our last debate about MAF's effect on Td5 i know it's useless to say more
 
I fitted a k&n filter to my 2 Ltr Pinto engine Ford with other go-faster mods bringing the engine BHP at the wheels from the factory spec 98bhp to 146, the filter didn't add anything other than induction noise so was removed.
Even modern performance cars I've owned still have paper filters.
 
sierrafery said:
The difference is like between a dirty old paper filter and a new one.... I didnt want to have a debate on that but as your statement makes me look like a liar i can tell you that i made comparative measurements just for fun with nanocom on the same road and same conditions and comparing the logs the readings were between 10-20kg/hr higher up to 2500rpm then between 20 to 45kg/hr higher above 2500 untill full load where it reached 649 with K&N and 602 with paper ... also the drop in AAP reading being lower with K&N the MAP reading was a bit higher as the result of that, which is normal as long as you understand what sensors are doing in an electronic management ... believe it or not and what ever you respond i'll rest my case for good now cos based on our last debate about MAF's effect on Td5 i know it's useless to say more
Click to expand...

You really don't have a bloody clue how a diesel engine works do you. The MAF has nothing to do with fuelling, for any given load/RPM manifold pressure, air is constant. Only fuel is changed to maintain RPM under load. There are reasons for differing air flows, but none have anything to do with the K&N filter.
 
You couldn't help yourself to not be rude could you?:rolleyes:... Have you ever heard of stoichiometric air-fuel ratio? i'm sure you did but i doubt you know how it's calculated for the Td5 and what's the purpose of airmass in it as the diesel to run lean... when you'll understand that the electonically managed diesel engine does what the electornic management makes it to do based on stored data(fuel maps), sensor's readings and complex calculations and it's not throttled with a cable then we can have a chat about that... what's painfull is that as you are a well respected member somebody who has an Eu3 Td5 might believe you that MAF has nothing to do with fuelling calculations and that would be a shame
 
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sierrafery said:
You couldn't help yourself to not be rude could you?:rolleyes:... Have you ever heard of stoichiometric air-fuel ratio? i'm sure you did but i doubt you know how it's calculated for the Td5 and what's the purpose of airmass in it as the diesel run lean... when you'll understand that the electonically managed diesel engine does what the electornic management makes it to do based on stored data(fuel maps), sensor's readings and complex calculations and it's not throttled with a cable then we can have a chat about that... what's painfull is that as you are a well respected member somebody who has an Eu3 Td5 might believe you that MAF has nothing to do with fuelling calculations and that would be a shame
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Don't talk out of your arse.
 
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Some google and the yanks did some sort of test they called it a white rag test or summat like that, they basically ran a std filter for so many miles then wiped the white rag around the pipework after the filter then did the same with the k+n its wasnt good news for the not so white rag with the k+n!

Its basically one of them mods for people who absolutely must buy a gadget for their car you know the ones with the drls and extra lights and reflectors and it really makes a difference honest:D

Just as an aside Ive been sevicing trucks for years and changed literally hundreds/thousands of air filters and not once have I thought wow this goes so much better with the new one and some of the old ones were proper ****e.
If and its a big if the k+n style was any good all truck firms would run them.
 
lynall said:
Some google and the yanks did some sort of test they called it a white rag test or summat like that, they basically ran a std filter for so many miles then wiped the white rag around the pipework after the filter then did the same with the k+n its wasnt good news for the not so white rag with the k+n!

Its basically one of them mods for people who absolutely must buy a gadget for their car you know the ones with the drls and extra lights and reflectors and it really makes a difference honest:D

Just as an aside Ive been sevicing trucks for years and changed literally hundreds/thousands of air filters and not once have I thought wow this goes so much better with the new one and some of the old ones were proper ****e.
If and its a big if the k+n style was any good all truck firms would run them.
Click to expand...

Lynall mate it is no good talking to people like him. He reads too many comics. When he mentions stoichiometric air fuel ratios it is quite obvious he does not have a clue how a diesel engine works.
 
Catweazle64 said:
Erm..o_O

I fear too much tinkering with the electrickery on the TD5 will only cause me more problems but happy to hear thoughts on that too.

Benefits vs Risks?
Click to expand...

Well worth doing, look up Dynachip he mapped my old 90. Bundles more power, much more torque and drivability was increased enormously. As in I could confidently overtake people and pull out of junctions without fear! MPG depends, if you floor it round all the time it will be worse, if you drive sensibly you may notice a minor increase. For £250 it is well worth doing!
 
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