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Old 08-14-2007, 06:09 AM
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I'm the manufacture of this tank and I don't smoke.

The outside fill pipe that will eventually be installed will have a fill pipe vent to aid filling but not vented to the atmosphere. Venting will be done through the vent fitting to a canister.
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Old 08-14-2007, 06:24 AM
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Charcoal Canister

If you can find a vacuum schematic of an '85 Chevy with a carburated 350 you can see how they connected the charcoal canister. The PCM doesn't control it. For your application you could probably forget about the TVS (thermal vacuum switch). The TVS doesn't allow the system to purge until the engine's warmed up.
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Old 08-14-2007, 07:51 AM
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I'm doing some research on the evaporative systems and found almost exactly as you described. I believe you are right. No need to make a complicated system. Even if I have to clean the canister occasionally. What are streetrods for but keep you busy. I'll use the extra AN-8 for a vent to incoming air I think rather than the cap. Possibly a power brake check valve.

Thanks for the years to look for, that will be a big help. I asked how much the canister was worth at the junk yard and he said $7 so it's done deal I think.

I was on the way to the junk yard yesterday to find one but I got interrupted by a dog that needed some pets. haha It's hard being newly retired and doing nothing but waste time on that dumb streetrod as my wife says. I told her the only time I wasted was the 2 hours I spent in bed...sleeping. haha

http://personal.utulsa.edu/~nathan-b...17evaporat.pdf
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Old 08-14-2007, 10:32 AM
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Charcoal Canister

That's about as simple as it gets and will work fine for your application. You might want to add a rollover valve so if your rod ends up on it's roof gas won't be pouring out. What is the system in the picture from?
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Old 08-14-2007, 02:18 PM
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just a question, if you allready have a "vent tube"exiting outside the car, and still have a gas smell eminating from the tank in the car, how would adding another vent (charcol filtered or not) solve the origional problem? NEVER PUT SUCTION OF ANY KIND pcv valve or other on a fuel tank vent!!!! You are asking for catastrophy!! I would concentrate on the cap on the tank,being the malfunction,or a pinhole in the tank top.(easy to check,just empty the tank of fuel,plug the feed line, and pressurise the return line with 5lbs of compressed air) I have used the exact tank in at least 10 applications for customers, and not had a gas smell in the car! these are even smaller cars without sealed bulkheads between the trunk area.
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Old 08-14-2007, 07:56 PM
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charcoal canister

There seems to be disconnect how the evap system works and how you think it works. I have to agree with Streetrodderbn. All the vent hose on the tank does is allows the fumes from the gas tank to flow into the charcoal canister by themselves. The vacuum that purges the canister is prevented from reaching the gas tank by a check valve. The check valve is built into the charcoal canister. When the vacuum is applied to the old style canisters the fumes from the canister are sucked into the engine along with fresh air through a filter at the bottom of the canister. Look closely at your picture and you'll see what I'm talking about. Then again, maybe I just misunderstand what you're saying.
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