murrayarnold Posted February 6, 2020 Report Share Posted February 6, 2020 Good day. My 73 runs triple webbers and electronic ignition. I have just bought a new set of NGK spark plugs. Can anyone enlighten me to the correct gap? Thanks. Quote Link to post Share on other sites
Mk2 Chopper Posted February 7, 2020 Report Share Posted February 7, 2020 What coil, if it's higher output than standard you can open the plug gap up a tad. Anyway the normal gap is 0.025" Gareth Quote Link to post Share on other sites
stuart Posted February 7, 2020 Report Share Posted February 7, 2020 First of all make sure you have genuine NGK plugs. https://www.ngkntk.com/uk/press-media/social-news/emea/fake-products-how-to-avoid-them/ http://www.ngk-sparkplugs.jp/english/techinfo/fake/index.html Stuart. Quote Link to post Share on other sites
murrayarnold Posted February 7, 2020 Author Report Share Posted February 7, 2020 7 hours ago, Mk2 Chopper said: What coil, if it's higher output than standard you can open the plug gap up a tad. Anyway the normal gap is 0.025" Gareth Wow. Think i made a wee mistake. I set them to 0.54. Time to take them back out. Maybe thats why it was a wee bit unsettled when i started it. Thanks guys. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted February 7, 2020 Report Share Posted February 7, 2020 What is the part number of the NGK plugs that you bought? My experience says the standard BP 6 ES are fine and they come out the box with the correct gap ( which should be checked of course) somewhere between 0.025”. & 0.032” is appropriate for standard set up and coil. Other people have gone for modern iridium plugs and praise their performance Cheers Peter W Quote Link to post Share on other sites
murrayarnold Posted February 7, 2020 Author Report Share Posted February 7, 2020 There must be something wrong. I am looking at 0.025 and its wafer thin. What am i missing Quote Link to post Share on other sites
Bfg Posted February 7, 2020 Report Share Posted February 7, 2020 don't suppose you're looking at metric feeler gauges are you ? .. if so 0.025" is 0.635mm Quote Link to post Share on other sites
murrayarnold Posted February 7, 2020 Author Report Share Posted February 7, 2020 Ah ha. School boy error. My gauge is metric and people are giving me imperial sizes. I live in Croatia. Its all metric here. I have just worked out the conversion Quote Link to post Share on other sites
murrayarnold Posted February 7, 2020 Author Report Share Posted February 7, 2020 1 minute ago, Bfg said: don't suppose you're looking at metric feeler gauges are you ? .. if so 0.025" is 0.635mm Spot on. My bad. What a muppet Quote Link to post Share on other sites
rogerguzzi Posted February 7, 2020 Report Share Posted February 7, 2020 4 minutes ago, murrayarnold said: There must be something wrong. I am looking at 0.025 and its wafer thin. What am i missing You are not getting MM and inches mixed up are you? 0.025 inch is about 0.63mm Roger Quote Link to post Share on other sites
Peter Cobbold Posted February 7, 2020 Report Share Posted February 7, 2020 No to worry, NASA managed to hit the backside of Mars with a similar metric-imperial confusion. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted February 7, 2020 Report Share Posted February 7, 2020 (edited) 16 minutes ago, Peter Cobbold said: No to worry, NASA managed to hit the backside of Mars with a similar metric-imperial confusion. oops Edited February 7, 2020 by BlueTR3A-5EKT Quote Link to post Share on other sites
Oddball Posted February 8, 2020 Report Share Posted February 8, 2020 Just wondering, do you have a fuel pressure regulator fitted, and what is the spark plug at the radiator end of the throttle linkages doing? Cameron Quote Link to post Share on other sites
murrayarnold Posted February 9, 2020 Author Report Share Posted February 9, 2020 No regulator. I am running the stock mechanical pump. The 7th plug eh. Now theres a question. Quote Link to post Share on other sites
murrayarnold Posted February 9, 2020 Author Report Share Posted February 9, 2020 16 hours ago, Cameron said: Just wondering, do you have a fuel pressure regulator fitted, and what is the spark plug at the radiator end of the throttle linkages doing? Cameron Ten years ago when i swapped out the power sucking SU carbs, they had a water cooled manifold. The webbers dont. So as a temp measure 10 years ago i blanked the pipe with the only available item available. Its been there ever since Quote Link to post Share on other sites
Oddball Posted February 9, 2020 Report Share Posted February 9, 2020 You will need a fuel pressure regulator to get them running properly. Weber’s like lots of fuel at a low pressure, (3 to 4 psi). Some people seem to get by with the stock pump, however I would recommend an electric pump. Cameron Quote Link to post Share on other sites
murrayarnold Posted February 10, 2020 Author Report Share Posted February 10, 2020 Ran them in stock mechanical pump for 10 years. They never hesitated once full open. I am aware of thier fuel needs and apparently the stock pump work just fine in them. Quote Link to post Share on other sites
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