I'm not seeing that on the Atlee Dodge website. It only shows a pic of the blue gasket, and no mention of an alternative for mogas?When you buy Atlee Dodge caps they ask it your run car gas or not. Blue gaskets 100ll. Black ones are for car gas.
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I'm not seeing that on the Atlee Dodge website. It only shows a pic of the blue gasket, and no mention of an alternative for mogas?
http://www.fadodge.com/fuel-cap-vented/
Sorry I don't buy the gasket swelling story.
We never had ethanol in gas that I know of. City gas DID used to have MTBE (methyl tertiary butyl ether) added to oxygenate the fuel. Sometimes it found its way into Valley gas stations. That stuff played hell on lots of equipment.
I'm not sure about SCs but the 150 HP fuel system in a Pacer will not meet CAR 3 fuel flow with out the pressure tube. Who know how Piper got it passed. Ed Trimmer discovered this when he STCed 180 HP in the Pacer.Why do you need ram vents on a 150hp airplane?
I'm not sure about SCs but the 150 HP fuel system in a Pacer will not meet CAR 3 fuel flow with out the pressure tube. Who know how Piper got it passed. Ed Trimmer discovered this when he STCed 180 HP in the Pacer.
Did it ever occur to you that it is possible, due to many fuelings over time both with a gas hose and a Jerry can that the filler portion of the tank may have been pushed down a little? When this happens the vent in the cap can be pressed against the cover filler neck gasket thus blocking the air vent. Over time you may not even realize that the filler cap was lower than it should be....Keep in mind that after blowing the tank back up that cap was used for the entire time and no issues. If the cap had been plugged by some other cause the problem of tank collapse would have persisted. It did not.
Jerry
Did it ever occur to you that it is possible, due to many fuelings over time both with a gas hose and a Jerry can that the filler portion of the tank may have been pushed down a little? When this happens the vent in the cap can be pressed against the cover filler neck gasket thus blocking the air vent. Over time you may not even realize that the filler cap was lower than it should be.
Some gas caps are very close to the top of the wing. Enough so that it is difficult to handle the cap.
Maybe that's why my 12 has the snorkel vents in the caps. I don't have a header tank. Haven't looked too close but with the Air research tanks, there is an outlet both front and back with lines going to a Dakota fuel valve. Pretty much like my 54 180 except it doesn't have forward tank outlets. It still has one above the cabin snorkel vent.The header-tank fuel system that Piper designed for the PA-18, kept a positive head to the carburetor
Will Univair's $100 milled aluminum caps handle 180hp? I'm using snorkel now. Milled aluminum are beauties.
Thanks, Steve. I should have mentioned I'm Bushmaster 180hp experimental, using snorkels in the air and Univair's parked because they seal better against moisture. After months on the ground in our relatively cool/moderate climate, I've drained little more than a couple tablespoons of water from the five drains, almost always from the port tank. It would be a shame to use snorkels if the beautifully crafted Univairs would keep the engine running!
As a practice I always remove my vented caps and put a sealed cap on when the airplane sits outside. No bugs, bees, mud dobbers clogging my vents. Its just part of my pre-flight when adding and checking fuel. ADK
One of them there government things.
§ 3.434 Fuel flow rate for gravity feedsystems. The fuel flow rate for gravity feedsystems (main and reserve supply) shall be 1.2pounds per hour for each take-off horsepower or150 percent of the actual take-off fuelconsumption of the engine, whichever is greater.
DENNY
It has been awhile since I worked on a 180hp conversion, the fuel line diameter needed to be the next size up to meet the fuel feed requirements. The goose-necked caps were a quick fix for if you were using the original fuel system lines. The positive pressure flow made up for the smaller diameter gravity feed rate.