What is the correct way to hook up a charcoal canister to a Holley 0-7448 2300 carb?

Rentalman

Rentalman

Active member
Good afternoon every one. The build is almost finished. What is the correct way to hook up the charcoal canister to a Holley 0-7448 2300 carb. This is a 1974 CA Scout II with 345. I replaced the OEM 4-barrel Thermo Quad Carb with the Holley 0-7448 2300, and deleted the smog pump and all related equipment.

From the liquid/vapor separator I have a 5/16" line that goes into the charcoal canister into the fuel tank nipple. I capped off the carb bowl vent on the canister since I dont have a carb bowl vent. Do I T off of the 3/8" line that goes between the valley pan/pvc to the carb vacuum port or do I T off of the Timed Vacuum Port that goes to the distributor? I tried AI and it gives me one suggestion and the next another. Thanks for all of your help. Have a Safe and Great 4th of July Celebrating 250 years of Freedom!
 
No, you'd want metered manifold vacuum. A Very tiny draw is all you need. Either get a restricted barb, or shove a carb jet in a hose and call it good.
 
Zaedster, thanks for the reply. I use this fitting on the manifold for a vacuum reading when I'm tuning the carb. It would be okay to use this same fitting redused to a 1/4" for the charcoal canister?
 

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All hooked up and working. I shoved a Holley 122-50 jet in the 1/4" vapor hose as you advided. With the hose on the purge outlet on the charcoal canister its about one inch from the purge nipple. The other end of the hose is hooked up to a 90 deg 1/4" brass barb fitting on the manifold that I would use for a vacuum gauge when tunning the carb. Thanks again.
 
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