So last night I fitted my filter I got given from a mate, just stuck it on the MAF, I know I know. It's not how I would run it if it was a permanent fixture. So fitted it and went for a drive...it felt a bit sluggish and lumpy to me compared to normal, could that be just down to it being an old filter (9 years!) or has anyone else had that?

 

I did like the induction note, but I would need the radio turned up after 5 mins of driving with the windows up as it makes a fair racket in the passenger footwell! I have come to the conclusion that if I ran a filter and a heat shield, I would get a naca duct from an evo, cut and stick it in. 

 

Also, does having the filter on the end of a cai make it quieter inside the car???

Thanks in advance for comments on an already over talked about subject, just couldn't find an answer to the sluggish/lumpy bit (unless it was in my head).

Not surprised it felt sluggish. The amount of heat generated under the bonnet of these 1.8T is huge and a filter on the MAF will just suck it all up and send the intake temps through the roof.

 

I have a CAI with the filter mounted down somewhere behind the bumper (but not too low down) and it seems to do ok. Also I dont notice a huge amount of noise either.

I'm interested on people's thoughts and findings on this one too!

I have a k&n stuck straight on my maf, I work in a motor factors so found the biggest I could in old stock (ended up to be off a Renault 19 16v!) for a bargain, although to be honest I hadn't noticed a dramatic difference in performance I'm always up for gaining some or re-gaining if I have lost some. What's most effective? Heat shield or cai? I'd guess cai...

Will it make a genuine difference?

Get a cold air Fed induction kit..

 

I got one off ebay for 49 quid, stainless pipe that's shaped to run down behind the battery and filter sits in behind the bumper.. 

 

Gives a nice noise with the 007p and also no chance of heat soak down there! 

 

Heatshields are okkk but still, th amount of heat generated under these bonnets as pointed out above means there is NO place in my bay for one of those as it will never be as good as a filter stuck down in the bumper out the way! 

I didn't notice any difference in performance, but I love the noise with my 57i.

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It may have been down to having an old filter, sounded good but was obviously lumpy compared to standard. I would use a heat shield if I went that route, still tempted so I have an excuse to pop a duct on the bonnet, but may just pop a piper cross panel filter in for time being.

The main reason for lack of performance and feeling sluggish is there is too much air going in at once.

This used to be a problem when cars ran carb's a lot of people just stuck a big filter on without re jetting the carb's to suit.

The factory filter has a hose before the air box so it restrict the amout of air going in to suit the fuel going in..

You will need a proper cold air feed with the pipes to get any benifit from it or get it remapped to suit.