In the Classic days only one lap was required between maneuvers and I automatically placed a 4 oz tank in the Argus. Thus I could never get past the over head eight, and I tried several "tricks" and tricks don't do the job.
So, be sure if you are building a classic, put in a tank more that big enough for the entire pattern and at least 6 laps after the four leaf just to be sure. I know this has been mentioned many times, but it is easy to get into a mindset and forget today's pattern requirements. This embarrassed me to no end at Paduca last weekend.
I have come to the conclusion that the only way this model will do the entire pattern is to go to shorter lines and just adapt to a faster lap until I can make a bigger tank to fit..
As it was I tried a leaner setting, almost starved it; lower pitch prop, lean setting; but if I could gain 1/10 Th second of flight time per level lap, I could make it all the way. I used to fly it on 60 eye to eye and never had to worry about running out of fuel, but it was too fast for me. Thus the longer lines and 2/10 Th's per lap slower and running out of fuel. That close. I have discussed this with some in the know and may go to a slightly smaller venturi from the one that came with the engine, but it is so great an engine I hesitate to do this...