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| holley 1920 dribbles https://www.slantsix.org/forum/viewtopic.php?t=57881 |
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| Author: | kielbasa [ Sat Jun 13, 2015 6:32 pm ] |
| Post subject: | holley 1920 dribbles |
Freshly rebuilt holley 1920 for my 65 valiant. I notice sometimes after a long drive garage will smell like gas. I popped off air cleaner everything seems dry isn't wet with gas down the barrel. But I noticed when I hit the throttle it continues to dribble for a couple seconds after the squirt. I used mikes carb parts kit. Set float height to spec. Unsure if that's the reason for gassy smell but doesn't seem right. |
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| Author: | cpslntdchrg [ Sat Jun 13, 2015 8:41 pm ] |
| Post subject: | |
Did it before?. Mine does the same, carb is NOS, and no leaks. If you have no charcoal canister (1970 and after) gas will evaporate from carb bowl, as the engine is hot. I would say is normal. You may try a thicker carb to manifold gasket, or a heat shield. Only other things I can think of: Did you measure gas level in bowl with car tunning? (But you should be seeing other problems). Did you set the bowl vent opening at the reccomemded height? (Its open anyway at idle, but maybe having it too open makes it worse). Any gas leak between gas pump to carb? |
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| Author: | kielbasa [ Sun Jun 14, 2015 8:47 am ] |
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Never used this carb before rebuild. I used it to replace a problem carter. Did not measure fuel level while running. And no leaks anywhere Nos one dribbles too? Interesting |
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| Author: | cpslntdchrg [ Sun Jun 14, 2015 12:01 pm ] |
| Post subject: | |
Sorry, closed garage smells like gas after a long drive for the NOS, and it takes a little more turning to start it next morning (starts almost inmediately when car ran for short time one day, and get restarted next). I'll check dribble later. |
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| Author: | cpslntdchrg [ Wed Jun 17, 2015 7:49 pm ] |
| Post subject: | Update |
Had a good drive yesterday with my car (20-25 min highway). Arrived at home, took out air filter, shut off the car and try to see dribbling inside the carb. Was not easy to see, but I saw no dribble before, or after I moved the throttle lever twice (each time I moved the throttle I saw gas spraying inside, the second time was harder to see as gas mist/vapor was coming up the throat). About the gas smell: mine does not smell like gas when you just park, but 10-20 mins after parked in closed garage (as the gas vaporizes from the bowl). Don't know how bad is the gas smell in yours, hopefully is not so bad. Check also fuel consumption (MPG). A value below 18-20 highway, 14-16 city (or below the ones you were getting before) might tell you you're using more gas than you should, and there might be some trouble with the rebuild kit/process (I know mileage values can vary a lot) |
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| Author: | nm9stheham [ Mon Jun 22, 2015 6:57 am ] |
| Post subject: | Re: holley 1920 dribbles |
Quote: Freshly rebuilt holley 1920 for my 65 valiant. I notice sometimes after a long drive garage will smell like gas. I popped off air cleaner everything seems dry isn't wet with gas down the barrel. But I noticed when I hit the throttle it continues to dribble for a couple seconds after the squirt. If the leakage is out of the same spot as the accelerator pump squirt, then possibly dirt or crud in the check ball in the acelerator pump is keeping it from reseating properly and allowing some more gas to leak out. Mike's videos on the 1920 rebuild process covers reseating this ball in its seat, if I recall correctly. It covers this issue as if it is not uncommon.
I used mikes carb parts kit. Set float height to spec. Unsure if that's the reason for gassy smell but doesn't seem right. |
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| Author: | kielbasa [ Fri Jun 26, 2015 10:35 pm ] |
| Post subject: | |
I emailed mike about it and he said it's normal. Not to sure if I believe that though |
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| Author: | wjajr [ Sun Jun 28, 2015 1:23 pm ] |
| Post subject: | |
If your carburetor vents directly to the atmosphere, which it most likely dose, it will cause a gas smell once parked. Hot engine causes some fuel in bowl to vaporize and will cause a gasoline smell in a closed building to at timed to be rather on the strong side. Unless fuel is leaking from carburetor onto various parts of intake & exhaust manifold I wouldn't' give it a second thought; you are just smelling the 1960's, 1950's, 1940's,1930's etc. However if raw fuel is finding its way to the exterior of carburetor or fuel pump and related plumbing that situation needs to be rectified. |
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