Toyspeed.org.nz Message Board

by **deaf_rattle** » Sat Mar 06, 2010 11:17 am

OK, the charcoal canister has two lines going to it. one is vacuum source and the other is to the fuel tank.

Do i need to run a charcoal canister? if not how should i delete it?
Should i just leave the fuel tank line vented in the engine bay? or should i delete it further back and just have it vented? or should i block the end?

cheers

by **fivebob** » Sat Mar 06, 2010 1:09 pm

Probably best to leave it in.

If you block it the fuel tank will pressurise. If you vent it you open up the possibility of igniting the petrol vapours that come out of the tank.

by **deaf_rattle** » Sat Mar 06, 2010 1:51 pm

bugger
its going to take up more valuable engine bay space

someone mentioned they need a one way valve in the line to the manifold? but i dont think this is correct.

See pic of stock set up, although i guess im not running stock n/a 5mge anymore.

by **deaf_rattle** » Sat Mar 06, 2010 1:55 pm

just had a thought.. the nz new ma61s didnt have a charcoal canister.
maybe i need to look into that further

besides im sure it would be useless nearly 30 years old.

by **Elmendorf** » Sat Mar 06, 2010 2:38 pm

Run my EP82 without the charcoal canister for years even had track use and had no issues with the removal of it. Didn't block anything off either.

by **tsoob** » Sat Mar 06, 2010 4:22 pm

Harlet wrote:Run my EP82 without the charcoal canister for years even had track use and had no issues with the removal of it. Didn't block anything off either.

+1 dont block it tho.

by **fivebob** » Sat Mar 06, 2010 4:40 pm

If it was NA and now it's turbo then it needs a one way valve or you'll pressurise that tank.

If you're going to run without it don't block it off, but it might be a good idea to put something like a sintered brass filter on it to reduce the likelyhood of a fire.

by **sergei** » Sat Mar 06, 2010 8:28 pm

NZ new Corolla GTI (~ FXGT) has little filter (like carb fuel filter) on that line and it goes into atmosphere in the guard area.

by **molex** » Sun Mar 07, 2010 11:54 am

Seen loads that vent into the wheel well area, usually with some sort of little filter, wouldn't anticipate any issues removing it all.

Website · by **Rick** » Sun Mar 07, 2010 12:53 pm

All you need is a to put a vent (like the ones below) in place of the charcoal canister its best to vent to the outside of the car not under or in the engine bay, there are a few different types around, some have ball bearings in them in case the car gets inverted etc... and have a flash aresster built into them. I have my one just behind the rear bumper.

by **Quirky** » Sun Mar 07, 2010 4:56 pm

Is it still okay to have the charcoal canister connected as per usual on a 4ag thats turbo? I would think that the vacuum line will now pressurise the charcoal canister?

by **jakesae101** » Sun Mar 07, 2010 5:38 pm

Rick wrote:All you need is a to put a vent (like the ones below) in place of the charcoal canister its best to vent to the outside of the car not under or in the engine bay, there are a few different types around, some have ball bearings in them in case the car gets inverted etc... and have a flash aresster built into them. I have my one just behind the rear bumper.

where do you get these from?

Website · by **Rick** » Mon Mar 08, 2010 6:29 am

jakesae101 wrote:where do you get these from?

Alot of boat shops have them or at least can get them in for you, there are a few on TradeMe.

Some performance shops have them.

http://www.trademe.co.nz/Trade-Me-Motor ... 948212.htm

http://www.smartmarine.co.nz/fuel-engin ... _1263.html

http://www.fostersshipchandlery.co.nz/a ... /tank.html

http://www.generalmarine.co.nz/shop/Sys ... thers.html

by **Snaps** » Mon Mar 08, 2010 9:26 am

Quirky wrote:Is it still okay to have the charcoal canister connected as per usual on a 4ag thats turbo? I would think that the vacuum line will now pressurise the charcoal canister?

Which would then pressurise the fuel tank, wouldn't it? (Unless there's a one-way valve in the charcoal canister)

by **sergei** » Mon Mar 08, 2010 10:38 am

Snaps wrote:
Quirky wrote:Is it still okay to have the charcoal canister connected as per usual on a 4ag thats turbo? I would think that the vacuum line will now pressurise the charcoal canister?

Which would then pressurise the fuel tank, wouldn't it? (Unless there's a one-way valve in the charcoal canister)

I believe there is a one way valve in the canister.

by **Bazda** » Wed Mar 10, 2010 9:20 am

Ok i'm a little confused..
Do the charcoal canisters vent pressure from the tank, or do they let the tank suck in air? Or it does both?

I thought that when you open the fuel cap after a long run its sucking air into the fuel tank not venting it out? As the fuel pump is sucking petrol from the tank therefore that space needs to be replaced by air...

by **sergei** » Wed Mar 10, 2010 10:29 am

Bazda wrote:Ok i'm a little confused..
Do the charcoal canisters vent pressure from the tank, or do they let the tank suck in air? Or it does both?

I thought that when you open the fuel cap after a long run its sucking air into the fuel tank not venting it out? As the fuel pump is sucking petrol from the tank therefore that space needs to be replaced by air...

Charcoal canister is there to remove evaporating emission.
basically it acts as temporary storage of petrol vapour until you are in right operating range where PURGE VSV opens and sucks stored vapour out (or in older systems it is tied directly to a bleed placed in a strategic place on the throttle body, where it only sees vacuum only under certain conditions).
The name implies that it contains charcoal, which is great absorbent of various compounds (main ingredient in gas mask filter), hence theoretically it can store more volume of fuel vapour than the volume of the canister itself.

EDIT: here is the proper description of the operation:
http://www.autoshop101.com/forms/h62.pdf

by **Bazda** » Wed Mar 10, 2010 10:58 am

Ok that makes sense.

For what Rick has done with the little valve he put on, that can only suck air in? but also lets vapour through?

by **cat007** » Wed Mar 10, 2010 11:54 am

So I'm still unsure of the outcome of this thread.

I'd like to remove mine - but don't want to just vent to the atmosphere for fear of the gases building up in certain areas and igniting.

Am I being paranoid?

What would a track marshal think of such things?

What do 'race cars' do?

by **sergei** » Wed Mar 10, 2010 3:38 pm

cat007 wrote:So I'm still unsure of the outcome of this thread.

I'd like to remove mine - but don't want to just vent to the atmosphere for fear of the gases building up in certain areas and igniting.

Am I being paranoid?

What would a track marshal think of such things?

What do 'race cars' do?

GO to pickapart and find a NZ-new car similar to yours and take the bits that sit instead of canister.

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