Quick thought on my car- I have a stock 1971 350-4v engine in my Special which has a 4 speed manual trans. I noticed that after I installed the replacement choke pull-off which works as it should, and set my idle speed to 850rpm warm in neutral, that while driving in gear and just rolling along with no gas pedal, I get the slight "burble" thru the exhaust and almost a popping thru the exhaust, not terrible, but there. In 3rd and 4th gear especially. I believe I read somewhere that on a stock manual trans quadrajet, there is a dashpot incorporated on it, that is meant for coasting. I think it holds a slight opening on the throttle, so that you don't get too lean while coasting or engine braking perhaps. I wonder if I should incorporate one of those? Carmantix, whacha think? Any others out there with some insight? Thanks.
I beleave the dash pot is for when U let off the pedal it slows it back down. there is a switch on the trany side cover that will adjust the timing when put in forth gear only.
I am not sure about a dash pot set up for the manual tranny. There were some suptle internal differences between standard and auto quadrajets. I will do some digging.
Well, for example, in 71 Quadrajets, the 350 manual had one size larger jets than the automatic. 69/68 the other changes were in the fast idle and regular idle settings, which are just adjustments. The 71 455 quadrajet had same jets manual/auto, but had different primary metering rods .045/.044 and secondary metering rods AY/AS.