tuning el carbo?

Question

i put a new street 600cfm ontop of my 383 magnum. i was tuning it and trying to tune the two a/f needles. i was tuning it like this...turn right til the rpms drop noticably, then turn back left til max. rpm is reached. i am doing it all by ear cause i have a 69 charger with a 727 witch means tic-toc-tac(clock instead of tach) it was working for me by listening for the rpm raise, but then it stopped sounding like the rpms were raising when i tried tuning it again allittle while later after i adjusted the float level.. i seated the needle and still no rpm drop??? anywho... i have to go somewhere tomarrow so whats wrong and how many turns out from seated could i put it at as a rough tune, so to speak, so i can drive it w/o it leaning out or flooding??thanks..

Answer 1

All of this before 7:30 in the evening! don't over tighten the mixture screws that enlarges the passage way. two and a half turns out for start up mixture. If you cannot get lean drop turning in on the screws 1.5 turns the float level is to high and fuel is flowing over the atomizing ring in the center of the primary bbls. Modern Holley carbs have backfire protected power valves. Used to take one kaboom and you would be pulling the float chamber to replace the power valve. Your power valve I do not know. power valve once blown you cannot even get the carb to lean out. Flooding will wash oil off the cyl walls and dilute the oil. And run poorly but just might make it to the auto supply. Keep a fire extinguisher handy removing float chambers on hot engines. And for saftey sake have an air cleaner on it while it is running, and adjusting.

Answer 2

2 1/4 turns out from seat.

Answer 3

I agree with George K, that's a great place to start.

Answer 4

you r only supposed to give it a half turn if my memory serves me correct

Answer 5

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