Sunday Project - Finally got to finish intake.

[No457 Snowy]

Well, I took sierra055's lead from an old DIY post and decided to get me some more fresh air. A trip to the Auto store to pick up a funnel, some air duct, hose clamps and a metal intake adapter.

Here are the bits, the funnel has already undergone surgery and the metal intake adapter is inserted into the flexible hose.



Here's the assembled lower half of the intake, complete with funnel shaped scoop and using the adapter to clamp the hose on, the electrical ties hold everything nice and firmly in place.



Here's the whole deal installed in the car and bolted to the bottom of the horn bracket, I had to re-bend one of the horn brackets to position the horn at a different angle above the scoop.



Here's the view from above, not much to see, just a hose running from the intake down to the scoop.



It was a fair bit of mucking around and scratched up hands and arms and new swear words to get all this done, and I still have to make up an extended angle bracket for the other horn which I removed for now, also you have to Dremel out the plastic between the fins on the lower vent, but that's no biggie. Pretty happy with the results not looking too ghetto, and the car seems to like like it.

So that was my Sunday gone!


Cheers

Snowy

[sierra055]

Nice one!! I remember inventing those same swear words when I did it, mainly when trying to route the pipe back up into the engine bay.

Have you had a chance to drive it much? Notice much difference with the CAI? The bum-o-metre definitely felt some improvement for mine.

I still haven't gotten around to re-mounting the other horn bracket though, lol. It probably wouldn't matter as the bass horn actually died a couple of months ago, so I swapped with the treble horn... I really only hit the horn when it's ABSOLUTLEY necessary! Should get around to getting another one.

[chris.]

looks really good man,
like you bought it from a peformance shop

[No457 Snowy]

Thanks for the original write you did on that mate, it helped me out quite a bit. I am going to change the hose at some point though I"m not entirely happy with the stuff I got. I'll just leave it be for now and sort the other horn out, I'll need to make up a slightly longer bracket and use some connectors to make the wires long enough to reach the new location.

Car felt pretty good and it will probably get better in the next day or so as I had the battery out overnight and I think the ECU might have to learn where to set everything up again. Overall but a good outcome.


cheers,

Snowy

[No457 Snowy]

I think this setup would probably come into it's own at highway speeds of say 80 to 110 kph to get heaps of air pushed in and filling the filter box and engine bay with pressurised cool air.

Snowy.

[D3bb4]

More pics please!!!!!!!!!!!! I'm tryina knock up a CAI myself. Would love some ideas Mine's a little different but, as for a 2L.

It seems a little dicey to me to remove stock intake pipe, as it's fed from the best place for air intake, near the grill. Am thinking of adding an additional 3" pipe, and merging them before the airbox, similar to what you've done.

Awesome use of a funnel!!!!

[sierra055]

Can I recommend trying a smoother internal pipe if you can? I used a silicone one from Autobarn, Monza brand I think.
The smooth interior should stop a majority of turbulence at the beginning of the pipe caused by the ridged material, which MIGHT reduce the amount of air finally reaching the rest of the intake.
We're probably talking minute differences, but if you're considering changing it anyway, it might be worth considering.

[D3bb4]

After working in wind engineering place for 6 months... at speed, it makes a hell of a difference to the velocity! Is alot involved, including coefficient of friction with walls of material air is flowing through, etc.

Smoother the better for sure. Just isnt always possibly with tight spaces.

[99gti]

I did something like this originally before I got my Neuspeed intake.

Take the battery and the base out and it will make your life so much easier. It's only 4 bolts I think from memory and it will open up the whole cavity down there for you get it all into position.

Nice work snowy - looks really well done. Has it changed the induction sound much at all?

[TSi2NV]

Look great, is this on a mk4?

[ranton-inc]

Nice Evoms intake man!

I was thinking about one but it would be way too loud and aggressive sounding on a R32..

my EVOMS CAI was freakin louder than my exhaust

[No457 Snowy]

Neil it has probably quietened it down a little if anything, I guess some of the sucking sound has moved toward the front of the car whereas it used to be all in the engine bay.

Hitman, LOL, yeah this EVOMS growls like a WRX exhaust when you get on it. It's fine when you drive sedately, but there is a serious Hoover effect at WOT. It would put a $2.00 wh*re to shame.

Chris, yeah it's a MK4 GTI


Snowy

[ranton-inc]

i was about to order one but just realised
i cut up my Credit Card last week

DOH

[No457 Snowy]

i was about to order one but just realised
i cut up my Credit Card last week

DOH

Sometimes I think that is the smartest thing to do!

Snowy.

[gavs]

After working in wind engineering place for 6 months... at speed, it makes a hell of a difference to the velocity! Is alot involved, including coefficient of friction with walls of material air is flowing through, etc.

Smoother the better for sure. Just isnt always possibly with tight spaces.

My sentiments exactly. Not just velocity but turbulence also, with lots of vanes and pockets to catch air, at speed you will get ebbs and flows in the air, kind of like rapids in a stream.

I'm currently trying to work on an induction system, utilising some of the original system, where the air is taken from next to the passenger headlight. The main restrictions I see in the factory design are:
1, the funky leaf catcher plastic mesh thing
2, the big support ribs behind the plastic mesh
3, the path over and around the headlight adjusters/bulb holders
4, that teeny tiny pipe from the headlight area to the air box
5, and finally, the noise baffles in the airbox.

As D3bb4 pointed out, friction is a problem as it generates heat, so a 3" flexi pipe possibly produces the same amount of useful, un-disturbed air as a 1", smooth, slippery pipe. But that's just a guesstimate.