hi, i have an edelbrock intake with no egr on my 350 carb car,engine has headers and no catalytic converter on the exhaust and no charcoal cannister...is the charcoal cannister needed or is it a wise idea to connect it ?..will hurt performance or is just not neccesary to have one with my set up...what does it do?..absorb gas fumes?,,,thanks.

 

That's about it - absorb fumes. You just want to attach a fuel line hose to the 3rd fuel hardline and route it out under the engine bay where he fumes/and potential leaks don't spray on the hot headers or spark.

 

ok,,i thought the lines connected to the cannister were only vacumm...how is it connected?..to what?,,,thankyou.

 

It has a 1/4" line that goes back to the fuel tank.

 

ok, i see the line you say,,it is on the frame near the steering box...so one part of the cannister connects to that and the other is connected to what?...thanks.

 

Will having the canister hooked up affect performance? no
but not having it hooked up will allow fuel vapor into the air, depending on what the car is being used for that can over a long time make a difference on fuel econ. I assume the carb set up does not have an 02 sensor, so even if the canister is hooked up, the car won't adjust for the slight rich mixture, so go ahead and ditch the canister just make sure to get completely rid of it, there is fuel inside and if it sits under the hood for awhile it will start to smell of bad gas, not a good smell when you are showing off all the mods you have made.

 

hi, i don't have one right now...so i guess from what you say, i shoudn't get one?,,,,

 

If they are passing you on inspection, I wouldn't waste my time - just make sure you have a line run under the car where if for some reason gas escapes, it doesn't get sprayed where there is ignition/heat sources. That 3rd line does run to the tank - anything is possible - so safeguard yourself.

 

hi there, no inspection...it's just that my car never had one and i thought maybe it needed one...and seing that line on the frame-rail near the steering box just there kind of bothered me a bit...it just seemed that it had to be hooked up to something!!...if i get a cannister, i will get the simple one with two ports...one for that line on the frame and the other is a breather?...it is not supposed to be hooked up anywhere...right?.......thankyou.

 

If you are going to get one, it will have an inlet and an outlet - fuel line goes in, vacuum line goes out to carb, TBI unit, or intake depending on your setup.

Like mentioned, you can just run a piece of rubber fuel line off that 3rd fuel hatrdline and route it under the car so that in the event of some leakage it'll drip out the bottom instead of in the bay.

 

HI, i will be getting a canister with an inlet and outlet only, the inlet will be the hardline that runs on the frame near the steering box, i should connect that to the inlet on the cannister?..then the outlet goes to the carb/intake?...i have an edelbrock perforemer rpm intake and 1405 carb ...where should i connect that outlet line to ?..i don't understand what can drip...where would fuel drip out of with this setup?...my hard line now is on the frame near the steering box, is just capped off at the moment ..it would drip there?...thanks.

 

If it's capped off, then it should be fine.

I've had one occasion in the last 4 years where fuel actually leaked out of that 3rd line - I think it had something to do with a just filled tank of gas and the very hot temps of the day - my tank built up alot of pressure (even though I have a vented cap) and I could hear a slight hissing when I parked - the cap was hissing, and I noticed a very small puddle where I ran the fuel line that I attached to that third line - it was gas, so I'm glad I had it routed under the car. I removed the gas cap, alot of pressure released, and I left it off for a few minutes and solved the issue. Lime I said, was only that one time - I had just filled the tank full, and the heat index that day was 115 and I attribute it to the heat.

If installing the canister, you need a vacuum line to suck the fumes out of the canister and into the intake to get burned, otherwise there's no point in the canister. The charcoal inside helps to trap the fumes, but they need 'sucked' out of the canister to be burned.

I'm assuming you are not using the vacuum port on the driver side if the carb, not many folks do - that would be a place you could run the vacuum line. Pass side should be hooked to your vac adv distributor, and the large in in the center should be attached to your PCV valve, right? leaving the driver side vac port unused and capped - you could run it there.

 

hi, ok i see what you mean, i haven't filled up my car 's tank on full often because of the crazy gas prices up here!!..but i can see how that line would leak/smell gas once the engine is off because of expansion in the fuel tank......i will connect that hard line to the larger inlet on the cannister and then the outlet (small) to the driver's side vacumm since i'm not using it as you mentioned as well ...the passenger side vacumm on my carb goes to the distributor and the middle large vacumm on the carb goes to the pvc valve..thanks for clearing all of this up.

 

hi there, i just received my cannister,,,,in the box there was little pieces of charcoal everywhere and seemed to be coming out of the larger port on the cannister,,,the smaller port had nothing,,,so i am assuming that the larger port is the inlet and will be connected to my hard line on the frame near the steering box to absorb the fumes (it's weird , it has "carb" written next to it )...and the smaller port on the cannister is the outlet & will be going to the vac port on my driver side carb (that one has "tank" written on it!)... is the writting on the cannister wrong?...seems the other way around....

 

What application is your canister from? Did you get the control valves with it?

 

hi, the cannister is supposed to be from a 82-87 camaro carb car..no control valves,,,just in and out on the cannister...it's just weird...the names on the cannister seem to be labeled backwards...if i would attach it the way it says on the cannister...my carb would be pulling the carbon in the carb....