holey carb gurus
#31
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I run Bob Madara's cams that are ~228 I, 232 E duration with ~.598 lift on both I & E, pretty mild idle but they pack the charge in really well on the top end. Peak hp is at 5500 rpm. I am still in the 90-91 mph range but looking to do another project with Bob this year to take it up another notch.
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#32
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I run Bob Madara's cams that are ~228 I, 232 E duration with ~.598 lift on both I & E, pretty mild idle but they pack the charge in really well on the top end. Peak hp is at 5500 rpm. I am still in the 90-91 mph range but looking to do another project with Bob this year to take it up another notch.
#34
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Try cleaning the air bleeds with some carb. cleaner, by sticking the red nozzle into the air bleeds. This carb. worked well once upon a time. Also a blown power vale will cause ir to be rich at idle.
#35
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I would first warm engine to operating temp set floats, and then set timing. I would run as much intial timing as possible at least 14 degrees with full advance around 35 to 36. Then set idel mixtures to max vac or rpm usually 3/4 turn out. should idel about 950 out of gear. put boat in water and install vac gauge. make sure when ideling in gear u do not drop vac under your power valve vac rating which is usually a 6.5 vac rating. If you are below that you need to change powervalve to lower vac opening then in gear idel vac. Just my 2 cents good luck!
#36
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I would first warm engine to operating temp set floats, and then set timing. I would run as much intial timing as possible at least 14 degrees with full advance around 35 to 36. Then set idel mixtures to max vac or rpm usually 3/4 turn out. should idel about 950 out of gear. put boat in water and install vac gauge. make sure when ideling in gear u do not drop vac under your power valve vac rating which is usually a 6.5 vac rating. If you are below that you need to change powervalve to lower vac opening then in gear idel vac. Just my 2 cents good luck!
#37
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Just a thought but my carbs were set up by Dean at Nickerson's and have always worked perfectly till I got my first tank of fuel with alcohol then they idled just as you stated all the carbs needed a extra 1/4 turn at each corner in the idle circuit. then they were back to there normal idle