gas fumes solution?

[snailwagon]

When I got my 1969 pig it came with a fuel and venting system that'd make ya say"WTF Mate?".

To solve my dilema I found a new tank (from a 79') that had a lot more vents and I didn't have any canisters, expansion tanks, etc.

Soo, I went to the junk yard and looked at old Toyota cars. Most yards have an old Toyota Crown, Supra, Cressida, or wagon of sorts. My stuff came out of an old 70s toyota wagon (little thing, did they make tercel thens). I grabbed a fuel seperator and check valve out of it. You should always run a check valve. Even not so early Toyota trucks have check valves you can use. They make great pocket souveniers commemorating your Pic n pull visit.

Most any toyota at a junk yard will have a charcoal canister. Mine came out of a mid 1980s Toyota truck. It also has a vacuum discharge that you can hook up to an Aisin carb. I ran hard line from the rear expansion tank up towards the charcoal canister.

Before I did this, to-the-left off camber on a hot day would make a lot of gas shoot out. Really tested those hose clamps there.

 

[PabloCruise]

It also has a vacuum discharge that you can hook up to an Aisin carb...

???

Esplain dis to me?

 

[snailwagon]

The canister has an input from the tank, and output for excess liquid that could accumulate, and then a small (maybe 1/8") vacuum purge line (that's the correct term, not vacuum discharge). When I first installed this, there was a 1bbl carb with an identical sized nipple near the carb base. The nipple was not the stock vacuum port for the distributor, as on this carb that port is threaded. I have no clue what it was there for, but it was there. It was stock on an f145, which for some reason came with air injection rails and air pump.

Now I have a 38mm weber (that works better than my aisins) and never searched for the right size fittings to add a new vacuum port. I'll dig up my box of carbs later and take a pic.

 

[snailwagon]

Here is a pic of the vacuum line on the Aisin carb base, and a pic of the Canister with the shiny vacuum purge nipple.

 

[brider]

charcoal canister hookup

For those that DO have a charcoal canister:

Page 2 of the diagram Trollhole posted the link to shows the charcoal canister with a line coming IN from the rear cargo fuel separators, a line going OUT to some kind of emissions box, and a line out the bottom to NOWHERE. Is this a drain?

 

[inkpot]

For those that DO have a charcoal canister:

Page 2 of the diagram Trollhole posted the link to shows the charcoal canister with a line coming IN from the rear cargo fuel separators, a line going OUT to some kind of emissions box, and a line out the bottom to NOWHERE. Is this a drain?

Howdy! The line out the bottom to nowhere is just an air vent. It allows the intake vacuum to draw fresh air thru the canister to pickup the fuel vapors/fumes to burn. John

 

[Southeast Overland]

Howdy! The line out the bottom to nowhere is just an air vent. It allows the intake vacuum to draw fresh air thru the canister to pickup the fuel vapors/fumes to burn. John

And the "out" line on the top goes to the carb base?

 

[inkpot]

And the "out" line on the top goes to the carb base?

Howdy! On mine, it goes to the VSV, which under the right conditions, allows the vapors to be sucked back into the carb base or intake manifold, somewhere. I don't remember which. John

 

[Southeast Overland]

Howdy! On mine, it goes to the VSV, which under the right conditions, allows the vapors to be sucked back into the carb base or intake manifold, somewhere. I don't remember which. John

My 2F is desmogged, so maybe I should just run this as another exhaust line...

 

[inkpot]

My 2F is desmogged, so maybe I should just run this as another exhaust line...

Howdy! That might get pretty entertaining if it backfires and lights up those fumes!! I would just run it into the air cleaner down stream from the filter. That way there is enough vacuum to draw in that filtered, vapor-rich air. John

 

[Southeast Overland]

Howdy! That might get pretty entertaining if it backfires and lights up those fumes!! I would just run it into the air cleaner down stream from the filter. That way there is enough vacuum to draw in that filtered, vapor-rich air. John

That sounds like a better idea. Will do! ...but my previous idea might be more entertaining!

 

[PabloCruise]

My 2F is desmogged, so maybe I should just run this as another exhaust line...

Howdy! That might get pretty entertaining if it backfires and lights up those fumes!! I would just run it into the air cleaner down stream from the filter. That way there is enough vacuum to draw in that filtered, vapor-rich air. John

That sounds like a better idea. Will do! ...but my previous idea might be more entertaining!

I thought I heard old-timers say you used to be able to turn the key off in carburated cars and coast for a minute and then key on the ignition - BOOM!!!

I heard this was even more entertaining in big tunnels...

 

[inkpot]

Howdy! Yea, but MAYBE just once!! Actually, when I was a kid, I used to drive my dad's 60 Dodge with the slant 6 in it. I would run it up pretty fast in second gear, turn off the key, and let it slow down in gear with my foot mashed on the gas pedal. Count to 5 and then turn on the ignition. BOOOOM!!! Never told my dad about that, though. John

 

[PabloCruise]

Ha!

Did he wonder why he had to replace the muffler???