Removing Charcoal Canister

[BlackBox]

Hi,

I have a r34 GTT and i want to remove the charcoal canister to tidy up the engine bay.

I have tried searching and have read a bit but i'm still not positive on what needs to vent and block. From what i understand they should all be blocked besides the one coming from the tank which should be vented with a breather?

I would like to remove all the lines possible instead of just looping them together, but im not sure which line goes back to the tank. Is my diagram correct?

Also when i remove my fuel cap it makes a 'whooshing' sound (Air entering/escaping) would this mean that their is already a problem with it venting?

[Got a Pulsar]

Wooshing from the tank is normal.

Consider relocating the canister rather than removing it as the authorities will slap you hard if they catch you without it.

[BlackBox]

Thanks for the reply,

Why does the tank 'whoosh' if it is vented/breathing?

And i'm pretty keen to relocate it to the bin haha

[Bronx]

i relocated it into the bin and that was the end of that, i plugged one pipe into the other one that runs under your throttle body. Fixed! no cop has ever known any different as it looks stock

[BlackBox]

bump bump

[NEO25T]

Hi guys just wondering if i could get some info on the carbon canister for an r34 gtt.

Mine is partially disconnected and gives a terrible fuel smell when starting the car.

It has 2 metal lines running to the back of the car, then there is a vent with a one way valve on the bottom of the can  letting air in and a vacuum line running up to the manifold through a solenoid.

Am i able to remove this solenoid and connect the vac line to the air filter pipe?

A few things are changing on the car at the moment so would be easier to do this now rather than later.

[WantGTR]

Honestly.  Better off not removing it. Leave as is. No stinky fuel smell

[NEO25T]

Well it does get stinky fuel smell now so im not sure the solenoid is working properly.

Does the solenoid just close on boost?

If so i could just replace the solenoid with a pcv or one way valve couldnt i.

[WantGTR]

Are you using a cat converter?

[NEO25T]

Yep

[silviaz]

Why do people remove these canisters on rb's?

Edited March 20 by silviaz

[GTSBoy]

50 minutes ago, silviaz said:

Why do people remove these canisters on rb's?

Bogan's gotta boge. Dumbarse's gotta dumb.

[silviaz]

3 minutes ago, GTSBoy said:

Bogan's gotta boge. Dumbarse's gotta dumb.

I'm pretty sure my car was owned by a bogan previously so they would explain things lol

[MBS206]

3 hours ago, silviaz said:

Why do people remove these canisters on rb's?

Because race car.

[silviaz]

1 hour ago, MBS206 said:

Because race car.

Don't see what difference it makes though. Mine has definitely been tracked though. Luckily the engine is in good nick lol

[GTSBoy]

23 minutes ago, silviaz said:

Don't see what difference it makes though.

For a real race car, remove everything that does not need to be there.

For "race car", which is what 95% of these cars are, then you remove it because "race car".

[R3N3]

I’m one of these idiots.. because ‘race car’ doesn’t really apply either.. I mainly did it to clean up the engine bay. Fortunately, rules in NZ are more relaxed and this isn’t illegal to remove.

[joshuaho96]

19 hours ago, silviaz said:

Why do people remove these canisters on rb's?

People think it's a waste of space, ugly, etc, generally associate "emissions control equipment" with "bad". These OBD1 vacuum-only systems I'm not a huge fan because I think they don't go far enough. They're wasting some of the fuel captured because they start purging as soon as the engine pulls vacuum. Later OBD1/OBD2 they put an electric purge valve on them to vent only when closed loop is active so the ECU will trim some fuel out. Even later OBD2 with zero evaporative loss the tank is 100% sealed from atmosphere until you run the engine or press the refuel door release. The tank has to take much higher vacuum/pressure spec but you never deal with saturating the charcoal canister and losing some fuel that way. The fuel also lasts as long as it would in a 100% airtight container which is nice when you're dealing with modern E10 pump gas.

Edited March 21 by joshuaho96

[silviaz]

1 hour ago, joshuaho96 said:

People think it's a waste of space, ugly, etc, generally associate "emissions control equipment" with "bad". These OBD1 vacuum-only systems I'm not a huge fan because I think they don't go far enough. They're wasting some of the fuel captured because they start purging as soon as the engine pulls vacuum. Later OBD1/OBD2 they put an electric purge valve on them to vent only when closed loop is active so the ECU will trim some fuel out. Even later OBD2 with zero evaporative loss the tank is 100% sealed from atmosphere until you run the engine or press the refuel door release. The tank has to take much higher vacuum/pressure spec but you never deal with saturating the charcoal canister and losing some fuel that way. The fuel also lasts as long as it would in a 100% airtight container which is nice when you're dealing with modern E10 pump gas.

That makes sense. Thanks!