Patcon Posted May 26, 2018 Share #13 Posted May 26, 2018 @240260280 Link to comment https://www.classiczcars.com/topic/59985-oer-dripping-fuel-inside-barrels/?page=2#findComment-549846 Share on other sites More sharing options...
TheCrazySwede Posted May 26, 2018 Author Share #14 Posted May 26, 2018 Tried smaller pump nozzles - no change. I do notice that even with pump and motor off, there's still dripping from the nozzle into the barrels for a few minutes afterwards. Link to comment https://www.classiczcars.com/topic/59985-oer-dripping-fuel-inside-barrels/?page=2#findComment-549850 Share on other sites More sharing options...
Patcon Posted May 27, 2018 Share #15 Posted May 27, 2018 1 hour ago, TheCrazySwede said: Tried smaller pump nozzles - no change. I do notice that even with pump and motor off, there's still dripping from the nozzle into the barrels for a few minutes afterwards. Maybe the float bowl level is too high? Then drips after shutoff until it reaches a certain level... Link to comment https://www.classiczcars.com/topic/59985-oer-dripping-fuel-inside-barrels/?page=2#findComment-549858 Share on other sites More sharing options...
TheCrazySwede Posted May 27, 2018 Author Share #16 Posted May 27, 2018 59 minutes ago, Patcon said: Maybe the float bowl level is too high? Then drips after shutoff until it reaches a certain level... Floats are within spec. Even tried lowering them - no cigar Link to comment https://www.classiczcars.com/topic/59985-oer-dripping-fuel-inside-barrels/?page=2#findComment-549862 Share on other sites More sharing options...
240260280 Posted May 27, 2018 Share #17 Posted May 27, 2018 I looked at the video. It is dripping from the accelerator jet. The problem seems to be in that circuit. What size spill jet do you have (#27)? Are the balls (#23) seating? Link to comment https://www.classiczcars.com/topic/59985-oer-dripping-fuel-inside-barrels/?page=2#findComment-549866 Share on other sites More sharing options...
TheCrazySwede Posted May 28, 2018 Author Share #18 Posted May 28, 2018 I don't think my OER's are setup like that; what Carbs is that diagram from? Everything seems to seat properly. The only thing I have yet to replace are these tiny aluminium gaskets sitting on the pump jets. I'll replace those and see if it still leaks. Link to comment https://www.classiczcars.com/topic/59985-oer-dripping-fuel-inside-barrels/?page=2#findComment-549938 Share on other sites More sharing options...
240260280 Posted May 28, 2018 Share #19 Posted May 28, 2018 Diagram is from SK Racing manual (below) SK Racing Carburetors Manual.pdf Link to comment https://www.classiczcars.com/topic/59985-oer-dripping-fuel-inside-barrels/?page=2#findComment-549939 Share on other sites More sharing options...
240260280 Posted May 28, 2018 Share #20 Posted May 28, 2018 Accelerator Jet Notes: 1. Since the accelerator jet outlet (25) is below the fuel level in the carb (27 area), fuel can siphon out when the weight (24) and ball (23) do not seat. This usually happens when the engine is running (vibrating) and jiggles the ball and weight. 2. At WOT, the air flow in the throat can pull a steady stream of fuel from the accelerator circuit. This extra fuel will add to the fuel from the main system to enrich the top end. Link to comment https://www.classiczcars.com/topic/59985-oer-dripping-fuel-inside-barrels/?page=2#findComment-549940 Share on other sites More sharing options...
TheCrazySwede Posted May 31, 2018 Author Share #21 Posted May 31, 2018 On 5/28/2018 at 3:01 PM, 240260280 said: Accelerator Jet Notes: 1. Since the accelerator jet outlet (25) is below the fuel level in the carb (27 area), fuel can siphon out when the weight (24) and ball (23) do not seat. This usually happens when the engine is running (vibrating) and jiggles the ball and weight. 2. At WOT, the air flow in the throat can pull a steady stream of fuel from the accelerator circuit. This extra fuel will add to the fuel from the main system to enrich the top end. You are correct, sir. Checked and everything is seating properly. I checked my vacuum via the port that connects to the brake booster and my gauge is hopping all over the place, suggesting a vacuum leak somewhere. Manifold is tight and all the gaskets on the Carbs seem to seat properly. Since this is a new engine (~1,000miles), could it be needing a valve adjustment after break-in? Perhaps that's what's giving me those wonky readings. Link to comment https://www.classiczcars.com/topic/59985-oer-dripping-fuel-inside-barrels/?page=2#findComment-550153 Share on other sites More sharing options...
240260280 Posted June 1, 2018 Share #22 Posted June 1, 2018 Not sure if it will cause a fuel leak but for a new build, it is good to do hot valve lash adjustments after initial 30min, 50km, 500km and 1000km. Link to comment https://www.classiczcars.com/topic/59985-oer-dripping-fuel-inside-barrels/?page=2#findComment-550156 Share on other sites More sharing options...
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