Re: bog
 

bill, did you fix your problem,if so what was it?

Re: bog
 

Check your choke pull-off also.

Take the Vacum Line off the carb,push in the arm ,and put your finger over the vacum hose.

Then let your finger off the vacum line and make sure the arm comes out fairly smooth, or just put a new one on and make a run.

Re: bog
 

Re/ the pull-off, on my car I found it important to bend the link so that, when the pull-off is fully pushed in, the air valve can only open a hair, maybe .010-.020". There is an enrichment circuit that is exposed to airflow as the front edge of the air valve begins to open which could cause excess richness if it is exposed at idle or when you're up on the converter. I cured a problem on my car by bending that link so that the air valve could not begin opening until the pull-off began to relax as vacuum dropped. My understanding is that this hole acts as a secondary accelerator circuit, drawing fuel into the secondary side to transition until the main circuit is providing sufficient fuel. One of the carb guys could explain this much better, but it is another Qjet thing to check.....

Re: bog
 

Note : Bill said he's leaving off a two step so the carb butterflies would be WFO on the line.
The choke pull off (vacuum break ) doesn't have as much importance in that situation.
The secondary accelerator pumps are made to function as soon as the flapper starts to open. In this situation , it would already be open or pulsing it's way to open.

Re: bog
 

No, I haven't fixed it yet but it's not from lack of trying. I've changed or worked on everything that has anything to do with the car leaving the line and It still comes back to haunt me .I thought I had it fixed at the pro-am race in Baton rouge: Ran fri- sat- and sunday with no problems.Car had good 60' ft times (high 140's) and then at my last pass in elim's it bogs 300 rpm's, goes a 153, and I lost. I haven't ran it since but I'm reasonably sure it's fuel related. Thanks for reply on air valve ; I checked to see if it's working but I didn't check what you said you looked at. It's hard to get something lined out when you don't race a whole lot.

Re: bog
 

Do not think this is crazy, however are you absolutely, 100% sure your foot is staying in the gas? We chased this problem for 2.5 years only to find that the two step made the carleave so hard (picked up .05 in the sixtey) that the seat gave enough for the accelerator to move. Just a thought.