Carbon Canister Removal

[QBee]

ClassiChimi said:

Im not sure I've driven it since the extra servo was fitted Anthony. I'm sure there's a thread somewhere that details this mod so I'll keep looking.
Cheers.

I had it done about 3 years ago - but you could be right.

[Richard 858]

SILICONEKID345HP said:

When does the ECU decide to vent the fumes in to the intake ?

Been reading mpg can drop by removing the system.

[footnote]E

Edited by SILICONEKID345HP on Sunday 16th October 21:46

I wouldn't worry Daz, your mpg will drop alot more when you slap the blower on

[QBee]

Richard 858 said:

SILICONEKID345HP said:

When does the ECU decide to vent the fumes in to the intake ?

Been reading mpg can drop by removing the system.

[footnote]E

Edited by SILICONEKID345HP on Sunday 16th October 21:46

I wouldn't worry Daz, your mpg will drop alot more when you slap the blower on

Ah, but at least there won't be any leaves on the line. Spot of multitasking from our Mr Parker.

[N7GTX]

QBee said:

ClassiChimi said:

Im not sure I've driven it since the extra servo was fitted Anthony. I'm sure there's a thread somewhere that details this mod so I'll keep looking.
Cheers.

I had it done about 3 years ago - but you could be right.

After reading Anthony's post on the clutch servo, I bought one to fit as stop start traffic can be tiresome with an ordinary clutch. Someone else fairly recently fitted the servo unit under the bonnet which would be much easier but then it will need protecting from the heat of the manifold with wrap.
There will be room behind the grille on the driver's side but the carbon canister may be in the way if still fitted.
You also must fit a one way valve that screws directly into one of the blanks on the plenum and maybe some vacuum hose if the length included in the kit is not long enough for your installation.

http://mgbhive.co.uk/product/mgb/mgb-mechanical/mg...

This screws directly into the plenum so no drilling, tapping etc. and its shiny

http://www.ratsport.com/PBSCProduct.asp?ItmID=1441...

[QBee]

N7GTX said:

After reading Anthony's post on the clutch servo, I bought one to fit as stop start traffic can be tiresome with an ordinary clutch. Someone else fairly recently fitted the servo unit under the bonnet which would be much easier but then it will need protecting from the heat of the manifold with wrap.
There will be room behind the grille on the driver's side but the carbon canister may be in the way if still fitted.
You also must fit a one way valve that screws directly into one of the blanks on the plenum and maybe some vacuum hose if the length included in the kit is not long enough for your installation.

http://mgbhive.co.uk/product/mgb/mgb-mechanical/mg...

This screws directly into the plenum so no drilling, tapping etc. and its shiny

http://www.ratsport.com/PBSCProduct.asp?ItmID=1441...

FWIW Mine is fitted with very fine bore copper pipe to/from clutch and servo. Mat Smith commented to me the other day that it might work even better with bigger gauge pipe.
I pass that on, but don't really understand it myself. However, Mat is rarely wrong.

[s p a c e m a n]

I've replaced all of my rubber fuel lines and was half planing on removing the carbon canister, the hose from the tank is not connected at the canister end and is hanging to the floor. Just ran the pump constantly for a few minutes checking for leaks without the engine running, fuel tank cap on.

There's a proper puddle under the disconnected canister hose, is this because the engine wasn't running or is something wrong? The amount that came out of the hose would probably fill the canister in 15 minutes, it can't possibly vent that amount through it normally.

[jesfirth]

s p a c e m a n said:

I've replaced all of my rubber fuel lines and was half planing on removing the carbon canister, the hose from the tank is not connected at the canister end and is hanging to the floor. Just ran the pump constantly for a few minutes checking for leaks without the engine running, fuel tank cap on.

There's a proper puddle under the disconnected canister hose, is this because the engine wasn't running or is something wrong? The amount that came out of the hose would probably fill the canister in 15 minutes, it can't possibly vent that amount through it normally.

sounds like something is wrong. does your fuel pump not cut off after priming when the engine is off - it shouldn't continually run?

my hose just vents by the rear wheels and I never get any fluid from it. also check that the vent hose actually goes up significantly then downwards not just straight down

[s p a c e m a n]

Yeah it primes normally, I just had it running constantly so that I could check for leaks without the engine running

Think that it comes out on the bottom rail, then goes up onto the top rail under the rear wishbone and back down again, is this the normal route?

[s p a c e m a n]

Just had a moment of clarity whilst in the shower. There was a leak at the fuel filter, bet that it was just spraying from there onto the chassis rail and then running onto that hose and dripping off of the end. I didn't actually inspect the hose, just saw it dripping. Assumption is the mother and all that

[Steve_D]

s p a c e m a n said:

Yeah it primes normally, I just had it running constantly so that I could check for leaks without the engine running

Think that it comes out on the bottom rail, then goes up onto the top rail under the rear wishbone and back down again, is this the normal route?

The reference to it 'going up' refers to the hose departing from the roll-over valve. The hose should ideally go vertical as high as possible before bending over and running down to the bottom of the boot space before passing through the bulkhead and running along the chassis rail.
If you are removing the canister then cut the hose short just before it passes through the bulkhead and run it instead through a new hole in the boot floor leaving about an inch of hose poking through.

Steve

[Engineer1949]

i installed it for anthony a while back it is indeed an mgb stand alone unit it needs as he said one pipe from the master cylinder that would normally go direct to the slave cylinder then a pipe from the servo to the slave and finally a non collapsible hose from plenum with non return valve to the servo as to pipe size larger would possibly make a slight difference more because with a largewr bore you could shift the fluid quicker from servo to slave problem is its a brake servo and the unions are brake pipe size so larger pipes would need more connections i.e reducers so not really practicable,as an aside the one problem the system has is lack of vacuum at certain times especially if the clutch is used repeatedly one solution would be a vacuum resevoir but sighting it would be a problem better still an electric vacuum pump with pressure switch which would keep the vacuum at a good high level constantly probably get more help to as they can produce better vacuum than the engine inlet.

john

[Hedgehopper]

QBee said:

Furry nuff. My wrong assumption.
I didn't even know my car had one until John Halstead binned it and put my clutch servo in the space. He said I didn't need it because my car was decatted. But he installed a purge valve front left.

Do you by any chance have a picture of your servo installation?

[QBee]

Hedgehopper said:

QBee said:

Furry nuff. My wrong assumption.
I didn't even know my car had one until John Halstead binned it and put my clutch servo in the space. He said I didn't need it because my car was decatted. But he installed a purge valve front left.

Do you by any chance have a picture of your servo installation?

I don't I'm afraid.
The servo is impossible to photograph, as it is buried in the front offside wing, below the headlight, ie where the carbon canister was. The rest of the install is copper pipes running from the servo to the clutch cylinders (he said vaguely, not having a clue which one does what) and a vacuum pipe running across the engine bay to the offside of the top of the engine, from where it draws its vacuum.
Finally there is a pipe extending the carbon canister pipe from where the canister used to be, across the engine bay floor under the radiator fans, to a purge valve which exits under the car nearside, right where the end of the chin spoiler is located. This allows the fuel vapours to purge under the car safely away from any source of spark.

[Hedgehopper]

Thanks QBee. I've not removed the carbon can yet so was just wondering how it compares in size to the servo that I want to replace it with.

[QBee]

Hedgehopper said:

Thanks QBee. I've not removed the carbon can yet so was just wondering how it compares in size to the servo that I want to replace it with.

Mine was an MGB servo I believe - if you email Engineer 1949 on here he will doubtless be happy to provide the info - he created the mod and installed it for me.

[Discopotatoes]

N7GTX said:

After reading Anthony's post on the clutch servo, I bought one to fit as stop start traffic can be tiresome with an ordinary clutch. Someone else fairly recently fitted the servo unit under the bonnet which would be much easier but then it will need protecting from the heat of the manifold with wrap.
There will be room behind the grille on the driver's side but the carbon canister may be in the way if still fitted.
You also must fit a one way valve that screws directly into one of the blanks on the plenum and maybe some vacuum hose if the length included in the kit is not long enough for your installation.

http://mgbhive.co.uk/product/mgb/mgb-mechanical/mg...

This screws directly into the plenum so no drilling, tapping etc. and its shiny

http://www.ratsport.com/PBSCProduct.asp?ItmID=1441...

would you happen to know if that one way valve fits where the brake servo pipe goes?

[Sardonicus]

Discopotatoes said:

would you happen to know if that one way valve fits where the brake servo pipe goes?

The trumpet base on our cars already as a servo one way valve fitted Rich (just like that 2nd link) strangely enough there is then another 2nd unit on the servo as Ford intended I am also sure Mac had problems in this department IIRC once he went boosted faulty/malfunctioning valves or suchlike, and those remote Lockhead Powerstop replica style servo's should come with a one way valve already fitted well the 2 I have fitted to a Minor and Scimitar did

Edited by Sardonicus on Sunday 13th November 23:58

[Discopotatoes]

Sardonicus said:

Discopotatoes said:

would you happen to know if that one way valve fits where the brake servo pipe goes?

The trumpet base on our cars already as a servo one way valve fitted Rich (just like that 2nd link) strangely enough there is then another 2nd unit on the servo as Ford intended I am also sure Mac had problems in this department IIRC once he went boosted faulty/malfunctioning valves or suchlike, and those remote Lockhead Powerstop replica style servo's should come with a one way valve already fitted well the 2 I have fitted to a Minor and Scimitar did

Edited by Sardonicus on Sunday 13th November 23:58

it does get a bit confusing when theres more than one, one way valve, mines got three then

[taylormj4]

I have just run a thread on the hoses to the carbon cannister.
What you don't want to do is leave an open hose from teh tank or the carbon can open in the OS wing (where the can is).
My car had the vent hose from the can just lying inside the wing instead of poking back into the engine bay and everytime I ran the car with the roof on (only whilst raining of course!) but windows down, it would draw strong petrol fumes into the car; presumably via the footwell/pedalbox area.

From some of the other posts, I have wondered whether disconnecting the carbon can would help reduce the shunting issue as others have said that shunting could partially be due to the contamination from the carbon can and it upsets the idle valve.

Have considered just clamping the hose to the plenum to see if it affects driveability but need to consider if that will upset anything else first.

[N7GTX]

Discopotatoes said:

N7GTX said:

After reading Anthony's post on the clutch servo, I bought one to fit as stop start traffic can be tiresome with an ordinary clutch. Someone else fairly recently fitted the servo unit under the bonnet which would be much easier but then it will need protecting from the heat of the manifold with wrap.
There will be room behind the grille on the driver's side but the carbon canister may be in the way if still fitted.
You also must fit a one way valve that screws directly into one of the blanks on the plenum and maybe some vacuum hose if the length included in the kit is not long enough for your installation.

http://mgbhive.co.uk/product/mgb/mgb-mechanical/mg...

This screws directly into the plenum so no drilling, tapping etc. and its shiny

http://www.ratsport.com/PBSCProduct.asp?ItmID=1441...

would you happen to know if that one way valve fits where the brake servo pipe goes?

There are 3 identical drilled and tapped holes in the trumpet base on my car. The centre one is for the brake servo. The other 2 are blanked off - you can just see them in the pic. The one way adaptor fits in any of those tappings.

Edited by N7GTX on Monday 14th November 15:16