Hey guys.

What have you used on your builds? I want to limit the fumes in the garage.

Also does anyone know how they are hooked up? Is it wired in line with the vent tube on the gas tank ?

 

I was thinking of using a small motorcycle canister but not sure how to hook it up as well.

Any ideas will be appreciated.

Thanks
Dan

 

X3.....I want to do this as well. Have looked online for a SIMPLE diagram, but all I find are for factory type setups and quite complex. There has to be a simple solution....

 

https://www.iimuch.com/collections/f...ts/fuelvent2dm

I just found this but it doesn't return the vapors to the system like a true evap

 

Just a Thought but I see you using a Bronco fuel tank. If it has the port for a vapor return can you run a hard line to a similar year charcoal canister, then use a vacuum purge valve in conjunction with a TVC ( Temperature Vacuum Control) to purge the vapors?
I don't think the early models had electrics , just run of manifold vacuum controlled by TVC.

 

I use 1993-1995 camaro units only because I have a good supply of them. Fuel tank hooks to the canister, there is a fresh air line to let air into the canister, and the purge line.
Now everything I build lately is with EFI so the computer pulses a solenoid to allow engine vacuum to purge the fumes. The latest EFI engine I am using had the EVAP setup turned off in the computer so I had to look into how the old carb setups ran, and they are amazingly complicated.
From what I have found you dont want the vacuum full time to the canister since this would be a vacuum leak. There is no easy way to do this automatically. I did install a TVAC switch that basically turns vacuum on at a preset engine temperature figuring once the engine is warmed up the computer could compensate for the vacuum leak.
But when I was fired my truck I seemed to have a vacuum issue so started disconnecting vacuum lines chasing the issue and I never did hook the TVAC switch back up. Right now my canister purge line is just open to the the world and I have no gas smell at all. I dont know how long the charcoal in the canister can just work like this but it has been this way for almost a year and is working fine with the just the line to the tank connected.
Different canisters have different hose connections but this is the schematic for the ones I use.



I have it mounted behind the running board.


If mine starts getting saturated and gives off fumes I think I will just wire up and EVAP solenoid with a momentary switch and purge it once in awhile.

 

I can't seem to find one to buy anywhere. And don't know enough to piece something together

 

Early carb setups were complicated messes for purging the canister, much easier to wire up a solenoid IMO..although like I said mine has the purge line open and working fine.

Here is a camaro canister on ebay. All you have to do is mount it and run a vent line from the tank to the canister. You can then also switch to a sealed gas cap if you want so no fumes come out that way either. If you do not have a port on your gas tank you can drill and tap a 1/4" NPT hole into the fill pipe and thread in a nipple for the vent hose. If you do this put the nipple up high close to the cap so when getting gas you cant pump gas into the vent hose.

94 Trans Am Camaro LT1 Charcoal Canister Emissions Fuel Purge 93 95 Vapor | eBay

All GM charcoal canisters I have had have the ports labeled right on the canister, it is molded into the unit. So if you find one at a swap meet it will still be easy to hook up. Vent line in from the tank, fresh air in from outside, and the purge line.

 

Hey Chad,
We looked into buying a new one - seemed to all be over $300... We just went
to the salvage yard and got one off of a Chrysler Minivan. I think we paid $35.
Set it up the way Drptp (Dave) does it .. It's a pretty simple set up ... & no gas fumes in your garage.

Good luck over there.

Ben in Austin
1950 F1

 

https://www.napaonline.com/en/p/CRB270036

i found this on napa

 

That would work great, no problem there.
I also run a fully sealed system once the canister is there, no vented fuel cap so fumes cant leak out the filler neck either.

 

I have this cap. They say it's vacuum vented so shouldnt breath out. Only in if needed?

 

My set up is similar to daves (Mr. 70ss)except Ford from my donor 89 E250 efi I used the hard lines from it and new rubber lines.
I managed to put it in the way of the front splash guard no elect on it but probably ran by the computer

I did not paint it maybe I should

 

I have never seen one of those, but if it is designed for OEM cars 1980s or newer you can be sure it is a non vented cap for a sealed system. GM switched to a sealed fuel system and non vented caps around 1970 depending on application. The vacuum venting is probably just for when filling the tank, remember the tank has two vents..one for putting in gas to let the air out and one to let air into the tank when the engine is running to keep the tank from imploding. The canister vent is for when the engine is running and takes the place of an old style vented gas cap.

 

The small tube on the right would go to the canister correct.

I don't nessessarily need to run a vapor can on my truck because I am running a crate motor but I'd rather just do it while in the build stage instead of adding after.