Need Help With Cold Air Box Construction.

[Just_Juzz]

I have a 1994 Toyota Curren, and am wanting to put a pod filter into it. I have the filter ready to go, but dont really want it to suck up the hot air from the engine bay.

As the filter doesn't fit into the standard cold air box, the only way I can see is to manufacture one of my own.

Has anyone made an airbox for this type of car or have a diagram of how to construct one that I can use?

OR

Is there anywhere in the Wellington region that I can get one made up for relatively cheap?

Cheers

[kingcorolla]

i heard shifting your battery to the boot frees up some space..

but id just bin the factory AIR BOX, yet keep the cold air feed hose in place, then just make custom box, shouldnt be 2 much of a mission.

[2fas4u]

i live in welly and i've come up with a few ideas. where abouts are you? PM and we can arrange a time to devise a plan on making an effective one. since you got more space, it's easier.

[Just_Juzz]

Thanx king....but that was my plan anyways. There is enough room with the battery in if a coldair box is properly made.

[D-T]

any chance of some pictures when you've sorted something out? running a 94 Curren here aswell, atm have removed the factory airbox and running a pod off of an addon piece of 3" pipe. doing fine for now but id like to get a cold air box in there. let us know how ya go!

cheers

[strap-on]

note.... cold air box's are only good for a bit more low end power, once your engine is making high rev's its sucking in so much air it doesnt have time to get hot

[FLAWLES]

stanless steal is good thats what i have used but my battery is in the boot so i have a size able air box made out of stnleess

but yeah what got20v says is true

[Sick Puppy]

Resurrecting the dead I know (nearly a year since last post), but anybody done this? If so, some photos would be good please, as I'm gonna be doing this myself soon!

[Rick]

Could do something similar to this



Go here for more info
http://www.4age.net/tech/coldair.htm

[Just_Juzz]

I started making one.... but I decided on leaving my standard cold air box in and putting a K&N Plate Filter in.

[bad20v]

Heres just an example of the cold-air box I built in my BZR....



When Im racing it, say at Puke Track, I just remove the RH headlight for better flow but it still works pretty good with the light in.

[Malcolm]

i don't get why so many people use materials that conduct heat such as steel, aluminium etc. A far better solution would be fibreglass, perhaps even fibreglass/foam sandwich construction. much better insulation, easier to make (imo), and far easier to make irregular shapes to fit around other parts

[Santa'sBoostinSleigh]

Could do something similar to this



Go here for more info
http://www.4age.net/tech/coldair.htm

only problem here is that you are far more likely to suck in water, plus you are extending the legnth of the pipe and adding in sharp bends, thus fcuking with airflow even more (generally)

[bad20v]

i don't get why so many people use materials that conduct heat such as steel, aluminium etc. A far better solution would be fibreglass, perhaps even fibreglass/foam sandwich construction. much better insulation, easier to make (imo), and far easier to make irregular shapes to fit around other parts

So your saying its far easier to shape and mould fibreglass/foam and resin compounds than cutting and bending metal? I havent seen many fibreglass air-boxes around, maybe carbon fibre ones, but I think it would be alot easier to make one out of metal given the fact that you would get the similar results for each different build material. It would be cheaper to make it out of metal as well.

[Alex B]

you could probly use your aloy one as a mold to make a fibreglass/carbon fibre one.

[Just_Juzz]

For non-track conditions, an alloy one is fine.

Maybe if it was in a race car you would make a fibreglass / carbon fibre one.

Cost of the materials would far outway the benifits that you will gain on the road.

[Malcolm]

i guess it depends what tools/expertise you have at your disposal, but a fibreglass cold air box would be easy as, all you have to do is tape up the area you want to do with duct tape, lay glass in it, and let it dry. Don't need to stuff about measuring, bending etc. And cost, well I guess a steel or alloy one would cost like $5-10 depending on what type you use and where you get it, and the fibreglass would be probably $20 or so.
It's alright, you can all relax, I'm not saying I think that steel or alloy ones are shite, just that I think a fibreglass one would be far superior, and still easy as to make.

I like the idea of having it in the fender well like that too, infact that's how my GT-Four was, and probably how it will stay on the new set up.

[bad20v]

Actually thinking about it now, I was going to redesign my air-box and put the battery in the boot. Hmmm... maybe I should look at building one out of fibreglass, just to see the difference.

How hard do you reakon it would be to make one out of carbon fibre? And what it involved in that process? Is it similar to fibreglassing?

[Malcolm]

carbon fibre is basically the same as fibreglass, just the materials are more expensive, and since most people like to leave them unpainted you need to spend more time making it look pretty, which I imagine would be quite tricky

[Sick Puppy]

Going back to Santa'sBoostinSleigh & Rick's entries (though the carbon fibre aspect sounds kinda cool), that's pretty much what I was thinking about the water aspect and the extra piping involved.

Having said that, I was just thinking of putting a bloody great dividing wall between the filter and the engine, running from the firewall to battery/ fusebox, like bad20v's photo (only I have a bit more room! ). What I was puzzling over was whether I should put some ducting in to get more cool air into the bay without cutting holes in the bonnet, as the layout is fairly tight. Getting round the radiator appears to be the main problem, which Ricks solution appears to answer. I hadn't thought that far outside the square, but as a compromise over the water/ piping drawback, what about leaving the filter roughly where it is, and running ducting into the box?

Darn it, I've just read this and makes little sense even to me, and I wrote it- I so need a camera to show this better...

Oh man, and I've just remembered something! there's this Trueno running around Napier with a similar design to Ricks, only the filter is literally sticking out of the fender, for all to see... figured he hadn't thought of the water etc.

Just as an aside, has anybody examined their intake system to find where the most restriction is, like with a manometer?