Help! I'm going crazy! My carbs run great EXCEPT the engine dies at idle once the engine warms up. Please consider the following and share any thoughts you may have, THANKS!
The engine is a rebuilt 1954 235 with a 848 head; less than 8,000 miles on the engine since built. I installed a Bulldog cam 2 years ago, use a 12 volt system with stock coil, rebuilt distributor, new vacuum advance, new points, condenser, rotor, plug wires, hot plugs at .045 gap. Timing at 8-10 degrees advanced.
I have a pair of Rochester BC carbs installed on a Fenton intake and headers.
The system includes heat to the base of the intake from the headers, insulating spacers, stainless steel tubing from the side of the thermostatic coil housing to a small hole drilled into the header to create a well to draw heated air to the choke housing. The floats are set to factory specifications. The jets are # 51s.
Choke/choke cover is rotated to move the plate until the plate in the throat of the carb just touches the wall of the throat (closes off the air passage). The choke rod to the idle cam is bent so the screw is sitting on the 3rd high step.
Both carbs are identical; every part has been matched to ensure balance and identical functioning. Both were rebuilt at the same time. The carbs were installed onto the intake at the bench and once installed on the 235 engine were balanced with a nanometer.
Using regular gas. Fuel pump is rebuilt pump from catalog with glass bulb filter, have an additional glass bulb inline fuel filter. All gas lines from pump to carbs are at least 5/16 diameter stainless steel, all 90 degree turns are smooth and maintain line internal clearance.
The linkage is custom; from block to carbs linkage is free moving without touching any part of the engine/exhaust; linkage is spring loaded and under tension when in use. Connection to each throttle lever is identical and fixed.
Have a great day,
Ted
