I woke up this morning, surprisingly without a hangover given last night's 6 hour drinking session, and felt in a mood to fettle with my car. First step was to clean it, and then I thought I'd have a look at the good old airbox to see what all this trumpet malarky was all about.

So, equipped with a Philips screwdriver and a chisel (don't ask) I popped the bonnet and proceeded to unscrew the airbox fixings and this is what greeted me when I lifted the cover.

Then I figured I may as well take a look up in the cover, as this was where this "trumpet" was located, and this is what greeted me.

Well - I gave it a shove, tugged it down a bit and shook it generally to see if it was nice and easy to remove. ( how many double entendres!? ) and would the damn thing move. NO! It appeared to be glued in. No amount of brute force and elbow grease would even wobble it, so it was time to dig. I went in the bottom edge with the chisel, no luck... Then tried sliding the narrow screwdriver up the sides, which resulted in one of the groove guides snapping off halfway up - like I cared!

Then, after a while, I just went for the bottom with the screwdriver and sure enough, SNAP! - and the thing came out nice and easy. It was bloody well glued in with something you know! I couldn't F'in believe it! Anyway, this is what the trumpet looks like out my car, complete with "wound"

Everything now back in place, and I've yet to see what difference it will make. The car's lost about 20g in weight at least.

to Matt for this cheap mod!

:nono: Jason, what have you gone & done ?? :eek:

hee hee. At least this time there was no need to utilise a hacksaw. I seem to be in a pipe clearing / derestricting mood at the moment.

I did something similar on the Astra when i had it.

Tried a K&N 57i Induction kit first, then ripped it out after a trip to Brum for the 2002 Motorshow, damn thing gave me a headache, i'd never buy another

Put the standard airbox back with a K&N Panel Filter, shortened the trumpet & cut a few other bits of plastic out and the difference was very noticable, nice & smooth and no noticable effect on fuel consumption

Hope its worked on yours

Nice one Jason!

The trumpet is longer on the TDi than on the RS. You should get a bit better response.

For a minute ther I thought you meant you needed a chisel and phillips to open the bonnet

For a minute ther I thought you meant you needed a chisel and phillips to open the bonnet

:nono:

Don't go putting ideas into his head. You know what he's like

If you leave both headlamp backs off you'll save another 40g AND be able to get all gears all of the time!

If you leave both headlamp backs off you'll save another 40g AND be able to get all gears all of the time!

and if you remove the engine cover, thats another 500g and 10bhp :rofl2:

If you leave both headlamp backs off you'll save another 40g AND be able to get all gears all of the time!

Strange how good some Briskodian's memories are, eh?

Yet to drive it TBH. Hopefully I'll shortly be going to town to play in a pub quiz, so I'll keep the radio down and see if I can notice any difference in the engine at all. Somehow I doubt I will, but it feels good to have done what I did.

(and now there's piccies to help others too)

just a note. when removing trumpet from airbox if you remove air mass meter 2 screws it saves breaking the trumpet and possibly airbox.

hope this helps.

ade

Now you do know the purpose of the radius bellmouth on the airhorn is to smooth airflow.... ie better airflow than without it...

You removed it?

Remember carbs? Have bell mouth trumpets on them? There's a good reason for that.

Best mod for your airbox would be to replace the intake horn and fit a larger diameter cold air inlet pipe into the box, routed to somewhere where cool air can be sucked in.

Woops. Lighter tho as you say :P

I found this and this useful

http://www.geocities.com/bora_we/airboxmod.htm

(p.s This Works !)

http://www.geocities.com/bora_we/cai.htm

"Ghetto moddin' "

... or I think Bill would call it SPT :hooray:

Gave the car the first run last night and this morning after the airbox "mod" and I have to say it still feels the same. It was quick before and it's quick now.

Perhaps the pick-up is a little better but to be honest it's always picked up very quick since Jabba tweaked it, and I can't put anything down to this mod. Still - it's all a question of owner satisfaction at having done "something" to their car.

:cheers:

Gave the car the first run last night and this morning after the airbox "mod" and I have to say it still feels the same.

Surely it will though? You haven't increased air flow, only messed with the movement of it. Try drilling some holes in the air filter housing.

Rob.

Don't give him ideas. A drill? For god's sake man, think before you put these things in his head!

Jason, have you tried removing the 'stop' from behind the accelerator? :shock:

Jason, has your airbox got vanes on the inside? Why not dry dremmeling them out and fitting a higher flowing air filter element.

Jon, is it wise to encourage Jason to use power tools?

Jon, is it wise to encourage Jason to use power tools?

I would'nt trust him to open a can of beans :shock:

Now you do know the purpose of the radius bellmouth on the airhorn is to smooth airflow.... ie better airflow than without it...

You removed it?

Remember carbs? Have bell mouth trumpets on them? There's a good reason for that.

Best mod for your airbox would be to replace the intake horn and fit a larger diameter cold air inlet pipe into the box' date=' routed to somewhere where cool air can be sucked in.

Woops. Lighter tho as you say :P[/quote']

Oh dear what have I started?

On the Fabia vRS the intake trumpet is much shorter and a wider bore than on the TDi, but the rest of the airbox seems the same.

Would the rest of the intake system straighten the airflow? Is it the airfilter that distorts it and what about the turbo?

:read: :cheers:

The bell is'nt there to straighten the airflow, just increase airflow. Bell mouth allows more airflow into the pipe. Jet engine air intake cowls is another example. Remember seeing the development program of Thrust SSC when they did the engine trials? (had to add and increase bell mouth to allow enough airflow into the engine)

Mesh etc on the MAF's straighten the airflow downstream for ease of laminar flow from which to measure.

Bigger is better for the VRs but still radiused for best airflow.

Good luck tho. Just thinking you/others should know what function this part plays in the induction tract.

regards

bill

...and there he goes, laughing his tits off and into the sunset... :-)

I have to admit I did see the potential for dremelling out plastic "veins" on the inside of the airbox, but somehow managed to refrain from doing so, due to a lack of dremel. As for a better filter - any recommendations will be gladly looked into!

I have to admit I did see the potential for dremelling out plastic "veins" on the inside of the airbox, but somehow managed to refrain from doing so, due to a lack of dremel. As for a better filter - any recommendations will be gladly looked into!

K&N no doubt do one compatible, but then you get the whole thorny issue about an oily MAF. Stick to standard but keep it changed frequently - 10k if you're feeling rich, 20k if you're not. And drill some holes in your airbox...

Rob.

if your thinking of changing the filter element see if you can get a free flowing dry element, i dont think you can get a stainless mesh element and the K&N and PiperX elements use dirt retension oil and this will come through with the air flow and muck sensors etc up further down the induction route.

I'd deffinately have a go at removing the veins in the airbox though, after reading the bora mods posted in the links i'll be doing that as soon as i get mine i reckon, i like the look of the front mounted air intake piping but wouldnt that cause problems come service time ? actually thinking about it, woulldnt fitting an aftermarket element cause you problems ?

i guess you could always keep a OE filter in the garage until you needed to take it in, sneaky swap over job :detective

i like the look of the front mounted air intake piping but wouldnt that cause problems come service time ? actually thinking about it' date=' woulldnt fitting an aftermarket element cause you problems ?

[/quote']

Wouldn't cause issue at a service - I can see the second might cause problems on warranty work if the element was shown to have destroyed the MAF or something.

The air intake piping has been done by a few people here, some have achieved a tidier looking effect than others...

Rob.