03-01-2009, 05:31 PM
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CC Member
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Join Date: Nov 2008
Cobra Make, Engine:
Posts: 2
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Not Ranked
I have a 428FE with 48IDA's on a straight cut manifold that boils fuel, too. The only carb that drips is the #5 & #6 cylinders. This carb gets the fuel first from the pump. The fuel boils up the E tube and drips out the main circuti on to the throttle plates. If you remove the E tube, the dripping will stop. I stuck a small thermometer probe into the E tube hole, into the boiling fuel. The tem is only 130 degrees. I then used a laser thermometer on the outside of the fuel bowl - same temp 130 degrees. I don't understand why the fuel is boiling at 130 degrees. Maybe it's the additives or Ethanol from today's fuels. Any ideas?
AFR
My 428 idles at 12.7 to 13.0. The motor will not tolerate anything leaner than that. I can cruise about 13.5; the motor runs well there.
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