My Pro Systems 950 was dead nuts on going down the track but pig rich at idle, adjusting the idle screws didn't do anything, I sent it Thumpercarb, he only worked on the idle circuit...It's perfect now. 1/8 turn on the idle screws makes a diff now where before NOTHING did.
Not to hijack but what did he do to it? My P S 950 acted the same way.
You’re not hikacking 👍. I am curious as well. I haven’t had a chance to get back at it as the weather has been rainy and cold and I don’t have a shop. My plan is to work on it more this weekend. From the above posts it appears I have some things I can try.
Pondering over this I’ve been thinking. My vacuum is lower than normal at 7”. It’s usualy around 10”. I plan to plug the back of the carburetor to see if that helps. Right now it goes to the power brake booster. And I’m curious if I could be losing vacuum from there? Or could it be a carb adjustment? It is steadily 7”. I’ve seen as much as 12” on the dyno with the dyno 850 carb.
