RICH WILD

Has anyone binned the carbon filter from their car and if so what did you do with the 3 pipes to and from it?

Does it give any benefits and are there any possible disadvantages?

And why do imports only have 2 pipes on theirs?

Cheers

Rich

iain atkins

Was just thinking this as well Rich.

So BTTT, as there are two of us interested now

Is this gonna be on your 96 or 97?

Cheers



Iain

AlanG

Done this but would need to go and look again to what i did cause it was that long ago!!

Alan

ChristianR

iTrader: (1)

I was told it had something to do with town driving? that is why I kept it, as that is really all i do

Scoty

Binned it cos it was in the road.

Also trying to remember were they went to!

One pipe went to the pipe that connects the MAF to the turbo inlet(now have a new turbo inlet, equivelent to blocking the hole that would be there on the original inlet)
One pipe went to boost solenoid (now blocked @ solenoid end)
One pipe came from the relay thingy that sits under the inlet manifold on the NS (blocked it @ relay end)

Dont know if that makes sence, so just block them all and ditch the Carbon filter

jonny gav

iTrader: (1)

binned mine too, the bottom pipe on the can goes to the petrol tank.
all i did was join all 3 pipes togethet with a T piece leaving the valves in place.
but i didn't rejoin it to the line that goes to the petrol tank, i just vented it to atmos.

reason i ditched it is it got in the way when fitting the FMIC.

this is on a pre 96 JDM car, not sure about the uk ones.

RICH WILD

Thanks for the replies guys.

I'm going to do it on both cars, Iain, but especially the green one as I've taken out the inner light on my Morettes and am using it as a cold air feed for the filter but that bloody carbon cannister is in the way.

Alan, those emails I resent to you have come back to me again [img]images/smilies/mad.gif[/img]
I can receive OK but can't send.

Cheers

Rich

RICH WILD

Does anyone know what each pipe actually does?

Cheers

Rich

Absolute Shower

What's this carbon filter thing? What's it for?

cswminty

Got any pictures of this guys ??

RICH WILD

Right,

Removed mine last night with (so far) no detrimental effects.

Basically unplugged all pipes and removed them (still attached to the carbon filter, undo 2 bolts and the whole lot comes off.

Left the pipes venting to atmosphere.

Now have more room for piping cold air feeds to the induction kit.

Rich

ozzy

Can those of you *in the know* actually explain where it is and exactly what it does (other than the obvious)?

Stefan

AlanG

Stefan

it sits next to the radiator next to the offside headlamp.

Basically receives any harmful emissions procured during the burn process, cleans them up in the cannister and emits nicey nicey fumes into the chassis leg area.

Alan

cswminty

Can you route the pipes anywhere else or do they need to be connected to specific points in order for the engine to function correctly ??

ozzy

Cheers Alan

OK, thickie 1-O-1 questions. By *burn process* do you mean the normal combustion process?

If so, my feable techie knowledge on engines tells me that gases are routed oot yer zort. So is the harmful stuff filtered before here or is this a seperate process?

Is this a Subaru thing or can these be found on any engine?

So, what are the benfits of removing this? Is it just to free up more valuable engine bay space or are there performance gains to be had (or more likely compliments exisitng mods).

Sorry if this has been covered before, but I'm genuinely interested and keen to learn something new.

Stefan

dowser

Be careful where you vent the middle connection - fuel was coming out of mine at a recent track day

http://www.scoobynet.co.uk/bbs/thread.asp?ThreadID=239256

Richard

MorayMackenzie

Re: (AlanG)"Basically receives any harmful emissions procured during the burn process, cleans them up in the cannister and emits nicey nicey fumes into the chassis leg area."

This is not the case.

The canister is part of the evaporative emmisions control system. This system controls the emmision of the fuel vapour fumes that build up in the fuel tank, and, in the process, prevents buildup of vaccuum in the fuel tank.

I would not recommend removing this unless you have a good idea as to what all the hoses do. I certainly wouldn't leave all the lines hanging upen to the atmosphere as someone claims to have done above.

Moray

MorayMackenzie

In summary: If you can't work out what the system is doing and how it is working, then leave well alone.

pugoetru

but its in the way

scoobyboy

it's there to collect the fuel vapour from the tank as moray said and then on start up they are sucked from the canister and reburnt.
also a safety thing as well imagine some lights up then throws the match in the direction of your car with you lot venting petrol fumes to atmosphere bye bye

RICH WILD

I have noticed something since doing this.

When I used to fillup, when I removed the fuel filler cap there was always a large hissing noise.

Since removing the carbon filter this does not happen.

Why is this?

Rich

P20SPD

iTrader: (1)

Probably because before the cannister restricted the escape of gasses until you start the engine, think it works on some sort of purge valve, one of the pipse goes back to the throttle body IIRC.

Now that that pipe is straight to atmos, there is no resistance, so the vapours exit immediately via the pipe to your engine bay.

Whereas before, the quickest and easiest way was through the neck of the tank once the lid is removed.

Why dont you just relocate it with some new hosing, say inner wing

Steven (still with carbon cannistor in tact)

RICH WILD

Good idea Steve,

I think I'll do that. Don't like the idea of fuel vapour under the bonnet.

Cheers

Rich

StanS

iTrader: (3)

I removed mine to relocate the PS reservoir. I joined all the pipes together with a "T", leaving all the one way valves where they were. Ony difference is that when I remove the filler cap there was a big hiss of releasing vapour from the tank.
I thought that the extra tank pressure would help push the petrol out of the tank to the pump, but then thought I'd drill a VERY small hole in the filler cap so XS pressure vents. Seems OK so far (4 months).
Stan
(PS - I know drilling the hole seems like cutting your head off to cure your head ache - but I didn't fully understand that system, and this seems to "work" !!!)

[Edited by StanS - 8/18/2003 8:20:04 PM]

tweenierob

I did the same as stan as far as drilling the cap goes, i blocked off the pipe at the manifold and blocked off the pipe by the bulkhead/Fuel filter.
Removed the canister so that i could route my FMIC pipework.

Was like it for at least 6 months and still is..

Rob

StanS

iTrader: (3)

Hi Rob !
It was probably you or Harvey who told me about drilling the hole !!!!
Stan

richrussell

Removing it will also render your car illegal in terms of emissions laws as well. Not that anyone actually checks there's a working fuel vapour control system, but technically it has to be there on a post-92 car...

It absorbs the fuel vapours from the tank (and manifold when you switch off) and directs them to be burnt safely. On older cars, the tank just vented to atmosphere near the filler cap, and the inlet manifold fumes just drifted out through the air filter when you switch off.

Rich.