charcoal canister for carborater

jmcleek · May 12, 2016

the charcoal canister I have has 2 ports for hoses a 1/4 inch that goes to the tank, and a3/8 inch for the purge . Tank is only vented to the canister. Should the purge line be tide in with the crank case vent?

RonD · May 12, 2016

The system is pretty simple.

Gas tank------------filter----------purge valve solenoid-----------engine vacuum

The computer runs the purge valve solenoid, it is just a 12volt = on solenoid, you can test it with a 9volt battery or car battery, no polarity.
It will make a "click" when opened or closed

After engine warms up computer will start pulsing 12volts to the solenoid to open and close it allowing gas fumes to be sucked into the engine to be burned.
You don't want to apply straight engine vacuum to the filter, solenoid must be used.

So no, not connected to crank case vent or PCV valve.
It is connected to the upper intake vacuum "tree"/manifold.

If you can't use purge solenoid then just leave system disconnected until you can.

EDIT:

Just reread your post, oops

Carburetor

Depends on the carb and PCV Valve system.
Hooking purge hose to a Ported vacuum source on the upper carb might be best, even on the air cleaner, not crankcase vent.
Concern would be the build up of gas vapors in the crankcase/valve cover areas.

adsm08 · May 12, 2016

I don't understand why a build up of fuel vapor in the crank case or valve cover area would be bad.

I like things that go boom.

jmcleek · May 13, 2016

adsm08 said:
I don't understand why a build up of fuel vapor in the crank case or valve cover area would be bad.

I like things that go boom.

Funnyyyyy So what you are saying is this won"t work. http://www.chicagocorvette.net/diagram_view.php?d=2352&rc=1952

85_Ranger4x4 · May 13, 2016

RonD said:
Depends on the carb and PCV Valve system.
Hooking purge hose to a Ported vacuum source on the upper carb might be best, even on the air cleaner, not crankcase vent.
Concern would be the build up of gas vapors in the crankcase/valve cover areas.

Couldn't it still fill the air cleaner/engine bay with gas fumes on a hot day? Or is there some kind of check valve that prevents that unless it sees vacuum?

RonD · May 13, 2016

85_Ranger4x4 said:
Couldn't it still fill the air cleaner/engine bay with gas fumes on a hot day? Or is there some kind of check valve that prevents that unless it sees vacuum?

The fuel sucked out of carb jets on shutdown and sitting in hot intake would make more fumes than EVAP could.

Carbs just keep feeding fuel in until that last intake stroke slows down and stops, lol
While fuel injectors shut off with the key, another fuel savings for injection

jmcleek · May 14, 2016

Canister has 3lines 1 is a vacuum control line . part# cp1022 standard made in usa

85_Ranger4x4 · May 14, 2016

RonD said:
The fuel sucked out of carb jets on shutdown and sitting in hot intake would make more fumes than EVAP could.

Carbs just keep feeding fuel in until that last intake stroke slows down and stops, lol
While fuel injectors shut off with the key, another fuel savings for injection

Just saying if the fuel tank has an open vent into the air filter housing it will vent full time. Temperature changes, taking in humidity whatever it wants.

jmcleek said:
Canister has 3lines 1 is a vacuum control line . part# cp1022 standard made in usa

Thanks for clarifying. Mine was never hooked up when I got the truck, the line is just plugged.

RonD · May 14, 2016

85_Ranger4x4 said:
Just saying if the fuel tank has an open vent into the air filter housing it will vent full time. Temperature changes, taking in humidity whatever it wants.

Yes, that's why I would be worried about venting it into the crankcase.
Upper carb and filter will always have gas fumes, especially in warmer temps.
Canister should stop humidity

jmcleek · May 14, 2016

One more part to get standard# cp104 purge solenoid.

and new diagram bottom of this page http://slantsix.org/forum/viewtopic.php?p=286781&sid=7c058b1cc3a9d02ba3a9c56f8dae3a6d

http://www.summitracing.com/parts/smp-cp104

jmcleek · May 15, 2016

I am working on moving the fuel tank to the rear of the truck. I found one that fits the space where the spare tire was mounted, and don"t hang lower than the Rease hitch. Have added the vent valve that goes in the rubber seal ,run new fuel line and return . Useing a fuel filter at the carb with the third fitting for the return. keeping the the return because it keeps the fuel moving and cooler to prevent vaper lock . The charcoal canester and perge is needed to let the tank beath and keed down gas smell . The gas cap has a one way valve that let in air but nothing out. the vent valve lets fumes out but not fuel. The canester filters out fuel vapers (99.9 percent) and vents the air out . The perge valve remove the vapers to a vacuum source at the bottom of the carb where the pvc line is hooked up. the perge valve is vacuum operated .

jmcleek · May 17, 2016

RonD said:
The system is pretty simple.

Gas tank------------filter----------purge valve solenoid-----------engine vacuum

The computer runs the purge valve solenoid, it is just a 12volt = on solenoid, you can test it with a 9volt battery or car battery, no polarity.
It will make a "click" when opened or closed

After engine warms up computer will start pulsing 12volts to the solenoid to open and close it allowing gas fumes to be sucked into the engine to be burned.
You don't want to apply straight engine vacuum to the filter, solenoid must be used.

So no, not connected to crank case vent or PCV valve.
It is connected to the upper intake vacuum "tree"/manifold.

If you can't use purge solenoid then just leave system disconnected until you can.

EDIT:

Just reread your post, oops

Carburetor

Depends on the carb and PCV Valve system.
Hooking purge hose to a Ported vacuum source on the upper carb might be best, even on the air cleaner, not crankcase vent.
Concern would be the build up of gas vapors in the crankcase/valve cover areas.

Thanks RonD :icon_pepsi:

charcoal canister for carborater

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