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K& N Performance


Guest Brutus
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This may be of interest to some..........

I have a copy of a write up in PERFORMANCE FORD where they tested the first K+N on a 1.8 Si Estate and the figures were impressive ....approx 8 BHP if i remember right. This was using the modified intake pipe which does away with the restrictive elbow......i''ll scan the magazine and post it up later

I have the same set-up on my XR3i Cab, and there's a NOTICEABLE DIFFERENCE THROUGHOUT.

 

The guy who wrote the article, DENIS FOY, also published a book' Escort Performance' detailing this and other mods, culminating in a final figure of 160 BHP for his own Si Estate, they also ran a series of articles in PERFORMANCE FORD 'Project Wagon' describing each mod in stages with rolling road figures to prove.

I know the guy personally, having met him on seperate occasions as he featured 2 of my cars in the magazine ,He also gave me a signed copy of his book, so this definately isn't pie in the sky.

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Cool mate, look forward to reading it, any ideas for my Cab pass em' over !!!post-4076-1200915400_thumb.gif
here ya go.......the proof's in the pudding!

 

2eds7ck.jpg

 

 

2ni5xfm.jpg

 

 

iwpwdw.jpg

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Guest turbocabbie

Personally I think the article is flawed as the engine is heavily tuned as quoted by them, this displays more about the requirements of the engine rather than how effective the air filter is.. the fact that it was not established if the 'New K&N Kit' was being tested against a New Standard Airfilter although the article suggests this was not the case as the article states "complete with original paper element"

 

A new K&N will perform better than a K&N that has done a lot of mileage and has airflow blocked by debris and that would prove nothing or just as much as replacing an original paper element with a new filter

 

Putting a high flow air filter on a car which does not require more air or can not consume it will achieve nothing and possibly make it run lean, a modified car such as in this instance may be suffering from lack of air and resolving this issue will create noticeable performance increases.. the test prove nothing except it worked well on that car.

 

I took a K&N of my car and got more power using an airbox as the K&N suffered from heatsoak.. does it prove that a airbox is better, NO it proves that a airbox suffers less from heatsoak on my heavily tuned car.. the articles seriously flawed imho

Edited by turbocabbie
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Putting a high flow air filter on a car which does not require more air or can not consume it will achieve nothing and possibly make it run lean,
AFAIK the Airflow sensor compensates for the extra airflow by adjusting the fuel to suit, hence better performance
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Personally I think the article is flawed as the engine is heavily tuned as quoted by them, this displays more about the requirements of the engine rather than how effective the air filter is.. the fact that it was not established if the 'New K&N Kit' was being tested against a New Standard Airfilter although the article suggests this was not the case as the article states "complete with original paper element"

 

A new K&N will perform better than a K&N that has done a lot of mileage and has airflow blocked by debris and that would prove nothing or just as much as replacing an original paper element with a new filter

 

Putting a high flow air filter on a car which does not require more air or can not consume it will achieve nothing and possibly make it run lean, a modified car such as in this instance may be suffering from lack of air and resolving this issue will create noticeable performance increases.. the test prove nothing except it worked well on that car.

 

I took a K&N of my car and got more power using an airbox as the K&N suffered from heatsoak.. does it prove that a airbox is better, NO it proves that a airbox suffers less from heatsoak on my heavily tuned car.. the articles seriously flawed imho

 

 

wow nice right up and for a change its not me that is being negative ......

 

but i do agree with you as the artical is bull lol .......

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Guest turbocabbie
AFAIK the Airflow sensor compensates for the extra airflow by adjusting the fuel to suit, hence better performance

 

Agreed but the airflow sensor adjusts to suit the requirement of the engine, not the air filter and because this engine was modified we do not know if the requirement for air was being met thus the results could be sensational for the wrong reasons

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Guest turbocabbie
I thought it was a Cracking little nugget of info, explained a few items I was unsure of, EXCELLENT !!!post-4076-1200997079_thumb.gif

 

I hope im not coming across as a bitch, I liked the article.. it was well written however the testing method produces misleading results.

 

You can not state that a 'NEW' K&N is better than an original filter unless that is also new.. you it proves is clean is better than dirty.

 

A standard car is a known quantity and the standard air filter flows enough for its requirements in general and as such using this as a test bed would indicate more than using a tuned car which may be restricted by air flow capability's thus removing this restriction causing sensational results which can not be contributed to the attributes of the airfilter.

 

Simply put the tuned car may have featured a ported head and cam which ensured it was restricted by the standard air filter, we do not know.. All we know is a Big New Clean Filter works better on that car

Edited by turbocabbie
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I hope im not coming across as a bitch,
Son of one maybe! lol2.gif

 

No, seriously..........fair comment, but i have the same set up on my XR3i 130 Cab and after swapping back and forth from that to OE airbox with NEW filter, there IS a noticeable difference with the K&N

Edited by Brutus
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Hi all, I noticed this topic and thought I would join and make a few points.

 

I've had 4 Zetecs over the last few years and this is the arrangement in the engine bays I had all Mk6 1996 on!

 

SIEngine.jpg

 

Basically all the zetecs P reg and above (maybe some N's) had this engine arrangement and this includes both the 1.8 16v 115ps and the 1.6 16v 90ps.

 

If you want some advice please do NOT do the following: Fit a K & N Cone or similar, put on bigger throttle body or MAF sensor or remove EGR etc if present.

 

These mods are a complete waste of time. The K & N makes it feel less responsive, I opted for K & N panel with drilled box and the performance was improved. 2.0 litre throttle body swaps are pointless and so are the MAF sensor they just don't do anything unless you were really wanting to go down the route of also using the 2.0 mondeo cams etc. The inlet system as standard does its job and personally havin had 4 of these engines and tested this I can say its a waste of time and money! Don't forget the car in the pics above had also had the head modified and exhaust etc so its bound to be a bit better.

 

CheeRS sorry to drone on just like to try n save ppl time money etc!

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