rodney007 wrote:what about bypassing the canister and running straight to the intake?,
would pluging/blocking it off stop or restrict circulation? :o
Crank case ventilation/recirculation system. Do not block it off. This will result in gasket leaks (sump, rocker cover) It also forces the oil so stop draining from your turbo because of the blow by pressure and may blow an oil seal in your turbo. I've seen this happen! As for performance, the blow by does effect A/F ratios this is why they don't recirculate it in race cars. It can bring on pre-ignition (detonation) if your car runs too lean. Run an aftermarket canister so the blow by can be expelled atmospherically through a filter.
I don't think you understand. He's not wanting to block off the oil catch can - he's wanting to remove the emissions evaporation canister.
I do understand and rodney007 did ask
rodney007 wrote:would pluging/blocking it off stop or restrict circulation? :o
The charcoal canister pictured in his engine bay is supposed to have a manifold vacuum actuated valve on the top that recirculates crank case pressure from the rear rocker cover outlet where he has a filter, into the MAF (factory that is). The blow by is then drawn through the filter and back into the engine. This canister deals with fuel tank vapour and pressure but it's primary job is to act as an oil catch can. There are no two separate systems as you seem to imply. They are two in the same thing!
vr4gone wrote:The charcoal canister pictured in his engine bay is supposed to have a manifold vacuum actuated valve on the top that recirculates crank case pressure from the rear rocker cover outlet where he has a filter, into the MAF (factory that is). The blow by is then drawn through the filter and back into the engine. This canister deals with fuel tank vapour and pressure but it's primary job is to act as an oil catch can. There are no two separate systems as you seem to imply. They are two in the same thing!
Yea that valve your talking about wasn't on their but have seen it on others.
vr4gone wrote:
Crank case ventilation/recirculation system. Do not block it off. This will result in gasket leaks (sump, rocker cover) It also forces the oil so stop draining from your turbo because of the blow by pressure and may blow an oil seal in your turbo. I've seen this happen! As for performance, the blow by does effect A/F ratios this is why they don't recirculate it in race cars. It can bring on pre-ignition (detonation) if your car runs too lean. Run an aftermarket canister so the blow by can be expelled atmospherically through a filter.
I don't think you understand. He's not wanting to block off the oil catch can - he's wanting to remove the emissions evaporation canister.
I do understand and rodney007 did ask
rodney007 wrote:would pluging/blocking it off stop or restrict circulation? :o
The charcoal canister pictured in his engine bay is supposed to have a manifold vacuum actuated valve on the top that recirculates crank case pressure from the rear rocker cover outlet where he has a filter, into the MAF (factory that is). The blow by is then drawn through the filter and back into the engine. This canister deals with fuel tank vapour and pressure but it's primary job is to act as an oil catch can. There are no two separate systems as you seem to imply. They are two in the same thing!
Go look at a Starion again and then try telling me the above. They ARE two different systems. The evaporation canister does NOT take any feed from the rocker cover or anywhere near it. It IS connected to the air filter housing just like the factory oil catch can, but the other side is connected to the fuel tank vent via a valve which is vacuum operated from a vacuum source off the bottom of the throttlebody, in the same block of vacuum connectors as the distributor advance mechanism.
Cut open an evaporations canister and you will NOT see any traces of oil whatsoever.
dirtygalant wrote:
Go look at a Starion again and then try telling me the above. They ARE two different systems. The evaporation canister does NOT take any feed from the rocker cover or anywhere near it. It IS connected to the air filter housing just like the factory oil catch can, but the other side is connected to the fuel tank vent via a valve which is vacuum operated from a vacuum source off the bottom of the throttlebody, in the same block of vacuum connectors as the distributor advance mechanism.
Cut open an evaporations canister and you will NOT see any traces of oil whatsoever.
I concede defeat. I'm utterly wrong about both the PVC system and the Evaporative Emission control system opperating as one system. My most humble apologies DG.
If you remove your Charcoal canister you should be aware of what you have to live with as a result.
If you remove the canister, and block the breather pipe from your fuel tank you will notice whenever you take the fuel filler cap off there will be a lot of pressure in the tank, especially on hot days. I have even seen people get sprayed with fuel as they open the fuel filler cap.
If you remove the canister and leave the breather pipe unblocked, your car will always smell like petrol, especially on hot days.
Removing the canister makes a car un-roadworthy in most places, however in Tasmania the police are very relaxed about this.
However it was the first thing I threw in the bin when I was building by track car, I have put a small filter over the fuel tank breather, and I put up with the smell.
avandull wrote:If you remove your Charcoal canister you should be aware of what you have to live with as a result.
If you remove the canister, and block the breather pipe from your fuel tank you will notice whenever you take the fuel filler cap off there will be a lot of pressure in the tank, especially on hot days. I have even seen people get sprayed with fuel as they open the fuel filler cap.
If you remove the canister and leave the breather pipe unblocked, your car will always smell like petrol, especially on hot days.
Removing the canister makes a car un-roadworthy in most places, however in Tasmania the police are very relaxed about this.
However it was the first thing I threw in the bin when I was building by track car, I have put a small filter over the fuel tank breather, and I put up with the smell.
Why cant it simply be link directly to the intake?
christ, I've told you this before - because you will introduce a massive vacuum leak after the throttle body. You do NOT want fuel vapour fumes entering the engine after the throttle body - ie after a point of where you can't control the engine via the throttle. A fuel tank is not fully sealed off, they have vents and often the fuel cap itself has a vent on it also.
I have never had any issues with the fuel cap blowing off - if anything there is always a vacuum in the fuel tank as the fuel pump draws more fuel out of the tank than the return line delivers back, therefore creating a vacuum.
Simply block off the vent line in the engine bay or remove it from the tank and block it off there. Discard the charcoal canister and its valve/lines and then block off the vacuum port at the base of the manifold.
dirtygalant wrote:christ, I've told you this before - because you will introduce a massive vacuum leak after the throttle body. You do NOT want fuel vapour fumes entering the engine after the throttle body - ie after a point of where you can't control the engine via the throttle. A fuel tank is not fully sealed off, they have vents and often the fuel cap itself has a vent on it also.
I have never had any issues with the fuel cap blowing off - if anything there is always a vacuum in the fuel tank as the fuel pump draws more fuel out of the tank than the return line delivers back, therefore creating a vacuum.
Simply block off the vent line in the engine bay or remove it from the tank and block it off there. Discard the charcoal canister and its valve/lines and then block off the vacuum port at the base of the manifold.
um.... i meant before the turbo, airfilter pipe, not intake mani. but if its that stressful for you don't worry lol
rodney007 wrote:
Why cant it simply be link directly to the intake?
it can.. but if you do that, you might as well have stayed sohc and tbi..
quest wrote:
WANTSOM wrote:Personally, I find sloppy boxes very unsatisfying. I like them tight and taught to the point that if you dont have to push to get it in then its probably too old and time to get a new one :P
don't try explaining that to her tho..... just leave. lol
I had a Euro spec starion a few years back that did not have the Charcoal canister at all. Must have been a euro thing (either that or someone removed it). Anyway, the tank did develop a vacum inside it between fills. When I went to put fuel in it, it would suck air into the fuel tank as I opened the fuel cap.
Dont they have a over flow/ breather at the filler neck? Not sure if my Euro starion had this or not but both my gold and blue starions have this. Surely this would stop any pressure or vacum building up? And the fumes, if any, would be at the rear of the car.
1984 Sigma Super, Turbo Wagon
1990 GSR-VR 50,000ks
1984 GSR II 4G63 302kw atw at 24psi
