For the past week or so I have been chasing this annoying bog when I try to floor the pedal off idle. I tried different timing, plugs, secondary spring tension adjustments, swapped out with different carbs several times, even checked on torque converter stall... yada, yada, yada. Still it bogged.
I have querying all the Jedi Masters about possible solutions and I found it today. Cliff Ruggles mentioned in an email that he had seen this sort of thing happen in aftermarket air cleaners when the lid was too close to the top of the carburetor. All this time I had been thinking it can't be that simple...well it was.
I have a reproduction ram air filter unit and the lid was so close to the base that it was restricting the air flow at full throttle. Today I was adjusting the timing and I tried the car without the air filter and no bog appeared. So I thought: "Great, it was timing afterall!"
So I put the air filter unit back on and attached the lid - the bog appeared full force. So that confirmed it: It was the lid and the short filter!
So I installed an old, taller element from a shaker unit - (it makes the lid stick up a 1/4 inch above sealing with the base), and tried it. No bog!
So let that be a lesson to you all. Sometimes it's the stupid little stuff that will drive you crazy.
THANK YOU CLIFF RUGGLES!
Here is the old filter and the new one. Only a 3/8" difference made all the difference.
