Hi people

Ive noticed that quite alot of folk on this forum has built their own induction kit due to high costs for aftermarket ones such as K&N.
Can anyone give me a list of what would be needed to build an induction kit?
Also is it relatively easy to build it as im not that great hands on.

I was thinking of buying a universal mushroom style air filter for mines, much like the HKS ones.
Is there any difference between a mushroom filter and a cone filter?

Any opinions, feel free to add

Thanks
William

[quote name='Wiffy0404' post='911285' date='Jul 7 2009, 01:14 AM']Hi people

Ive noticed that quite alot of folk on this forum has built their own induction kit due to high costs for aftermarket ones such as K&N.
Can anyone give me a list of what would be needed to build an induction kit?
Also is it relatively easy to build it as im not that great hands on.

I was thinking of buying a universal mushroom style air filter for mines, much like the HKS ones.
Is there any difference between a mushroom filter and a cone filter?

Any opinions, feel free to add

Thanks
William[/quote]

[url="http://www.107oc.com/index.php/topic,5464.0.html"]http://www.107oc.com/index.php/topic,5464.0.html[/url]

there was a discussion on induction kits over on the 107 forum. one of the links provided showed a series of the cars fitted with different induction kits including the mushroom type one, here is the link provided.

[url="http://my107.blogspot.com/2007/03/induction-kits.html"]http://my107.blogspot.com/2007/03/induction-kits.html[/url]

After reading all o fthese i'm thouroghly confused about whether to get one or not.

Of all the systems shown, just 5 of them actually address the Carter Ventilation the correct way.
The ones with the extra little filter would be an MOT-fail in the Netherlands...

And the ones with the filter next to the battery have two problems of their own:
they're behind the radiator, so they get fed mostly HOT (thin) air and that is
if they will fit at all: on a car with A/C there will be two pipes there,
so there's little to no space for a big filter construction...

Induction kits are of no benefit unless they have a good supply of cold air. If they are just sucking in warm air inside the engine bay you won't expect any improvement in performance, just engine sound, so I guess the approach you take depends on what you want from the system.

Some systems seal the filter from the rest of the engine bay using shields which have flexible seals at the top so the underside of the bonnet will sit directly on top avoiding any ingress of warm air, but looking at the Aygo engine bay it's not obvious to me if such a system can be properly fitted.

Aww dammit, i was actually thinking about fitting the air filter next to the battery haha
You have any good suggestions then Jan?

Well im aiming for the performance from the air filter, not too bothered about making the sound

On a LHD car you can put the filter to the other side, but I'm not sure if this will work in the UK,
as the pedalbox/brakbooster/throttle-cable might be in the way on a RHD car...

I have the air filter on my current induction kit mounted next to the battery. The inlet air temperature is around 2-3 degrees cooler than the standard airbox, when connected to a scangauge type device.
I believe this is due to the larger surface area of the filter. I ran with the airbox refitted a while ago, and there was a definite drop in performance. On motorway hills a had to change down a gear to maintain speed, but with the induction kit no downchange is needed.

[quote name='timcrasher' post='911749' date='Jul 8 2009, 04:26 PM']I have the air filter on my current induction kit mounted next to the battery. The inlet air temperature is around 2-3 degrees cooler than the standard airbox, when connected to a scangauge type device.
I believe this is due to the larger surface area of the filter. I ran with the airbox refitted a while ago, and there was a definite drop in performance. On motorway hills a had to change down a gear to maintain speed, but with the induction kit no downchange is needed.[/quote]

Have you fitted like a heatshield or cold air feed to your filter or you just left the air filter sitting as it is?
Im considering doing something like that if alot of heat is generating near the battry

No, I don't have a heat shield. The filter is just above the direct air passing through the radiator. It sits in quite a large volume of air, but a cold feed would be better. I am making one at the moment. I hope to get it finished and fitted for the weekend.

[quote name='timcrasher' post='911774' date='Jul 8 2009, 05:49 PM']No, I don't have a heat shield. The filter is just above the direct air passing through the radiator. It sits in quite a large volume of air, but a cold feed would be better. I am making one at the moment. I hope to get it finished and fitted for the weekend.[/quote]

Aww nice one, yeah that would help alot i think.
Can you upload a picture of your engine once your done thanks.

just found this on ebay!
[url="http://cgi.ebay.co.uk/63mm-2-1-2-Neoprene-Cold-Air-Feed-Ducting-Hose-1-Metre_W0QQitemZ140291877422QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item20aa0c2a2e&_trksid=p4634.c0.m14.l1262&_trkparms=|293%3A1|294%3A30"]http://cgi.ebay.co.uk/63mm-2-1-2-Neoprene-...93%3A1|294%3A30[/url]

Here is the carbon fibre cold air feed airbox I have been making. It feeds from air at the leading edge of the bonnet. I did a quick test today and it certainly make the car feel more lively. It also has a nice "roar" that resonates round the new airbox. The cover weighs just 148 grammes. This is the first one off the mould, and needs a few slight adjustments, until I will be completely happy. I am getting the fueling checked next week on the rolling road, so i will also find out if there is any performance differences.
[img]http://i189.photobucket.com/albums/z63/timcrasher/NewInductionkitfilter.jpg[/img]
[img]http://i189.photobucket.com/albums/z63/timcrasher/CarbonColdFeedAirBox.jpg[/img]
[img]http://i189.photobucket.com/albums/z63/timcrasher/CarbonAirBoxfront.jpg[/img]
[img]http://i189.photobucket.com/albums/z63/timcrasher/CarbonAirBoxScoop.jpg[/img]

Man thats awesome tim

Did you have to make the carbon fibre airbox yourself or can you buy them?

I made it from scratch. It's the second version. The first one didn't flow properly. I had to make it because nobody makes anything other than the K&N Induction kit. You can buy more stuff for an IQ, than an Aygo.

[quote name='timcrasher' post='911992' date='Jul 9 2009, 03:13 PM']Here is the carbon fibre cold air feed airbox I have been making. It feeds from air at the leading edge of the bonnet. I did a quick test today and it certainly make the car feel more lively. It also has a nice "roar" that resonates round the new airbox. The cover weighs just 148 grammes. This is the first one off the mould, and needs a few slight adjustments, until I will be completely happy. I am getting the fueling checked next week on the rolling road, so i will also find out if there is any performance differences.
[img]http://i189.photobucket.com/albums/z63/timcrasher/NewInductionkitfilter.jpg[/img]
[img]http://i189.photobucket.com/albums/z63/timcrasher/CarbonColdFeedAirBox.jpg[/img]
[img]http://i189.photobucket.com/albums/z63/timcrasher/CarbonAirBoxfront.jpg[/img]
[img]http://i189.photobucket.com/albums/z63/timcrasher/CarbonAirBoxScoop.jpg[/img][/quote]
THAT is VERY SEXY
I WANT

Where did you get the carbon fibre to make the airbox?
Is it easy to make a carbon airbox?

Wouldn't it be better going to the front grill to get better airflow? Very nice work though, does look great, hats off for the skill and inginuity.

Mind you, if you don't want the sexy carbon fibre then this sort of thing is a cheaper option ...

[img]http://thereifixedit.com/wp-content/uploads/2009/05/tifi-mmmpringles.jpg[/img]

Some plastic piping from Wickes and duct tape might be a bit posher though.

Regards

Andy

I would have used Chili beef flavour myself

I did use a duct mounted to the drivers side part of the grill near the badge, on the first version I made. This was in direct air flow, but it was fast moving turbulant air. It is also right next to the catalyst in the exhaust which is very hot, and hot air is no good for fuel mixing.
The latest version feeds from the still, high pressure air created at the leading edge of the bonnet. This is better for fuel mixing because it is oxegen rich. Many engine tuners realise this and make their airboxes the same way, Simota, Monster Sport,etc. I was suprised at how much air flows over the slam panel and into the engine bay.

[quote name='timcrasher' post='912159' date='Jul 10 2009, 08:16 AM']I would have used Chili beef flavour myself

I did use a duct mounted to the drivers side part of the grill near the badge, on the first version I made. This was in direct air flow, but it was fast moving turbulant air. It is also right next to the catalyst in the exhaust which is very hot, and hot air is no good for fuel mixing.
The latest version feeds from the still, high pressure air created at the leading edge of the bonnet. This is better for fuel mixing because it is oxegen rich. Many engine tuners realise this and make their airboxes the same way, Simota, Monster Sport,etc. I was suprised at how much air flows over the slam panel and into the engine bay.[/quote]

That's really interesting info, thanks for that. I would never have thought.

regards

Andy

[quote name='Wiffy0404' post='912135' date='Jul 10 2009, 01:33 AM']Where did you get the carbon fibre to make the airbox?
Is it easy to make a carbon airbox?[/quote]
You can buy carbon cloth from most glass fibre suppliers, or there are sellers on Ebay. I used a wet lay up like you would making something using fibre glass. It needs another top coat of resin and flatting and polishing to finish it properly, but I ran out of time.

Oft sounds rather alot of work.
My town is crap for motoring, theres hardly any shops or places you can get car stuff from apart from Halfords.

I may just stick to a normal heatshield of some sort with a cold air feed
Plus im not good hands on so i probs wont have the ability to make a one as good as yours.
Unless you fancy making one and ill buy it off you haha :L

[quote name='Wiffy0404' post='912354' date='Jul 11 2009, 12:00 AM']Unless you fancy making one and ill buy it off you haha :L[/quote]


I'll second you to that - that is one HELL of a fine airbox!!!

You have PM young sir

not on a aygo but on my car same carbon fiber air scoop though.gets the looks when the bonnets popped!
nice work on the aygo you should make and sell them when mine was new it cost £150.
[img]http://img687.imageshack.us/img687/6611/p3009092223.jpg[/img]
[img]http://img5.imageshack.us/img5/7310/p3009092201.jpg[/img]