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...

My Aero Tiger .36 gets about 6 1/2 minutes on 4 ounces. It was in an Olympic, now a Shark 35. This engine does have a lot of run time -mileage improves with use. 5% nitro, Bolly Clubman 10.5 x 5 prop. One layer of silk stocking material over stock venturi. If that differs from your set-up you may want to try something similar. 

I finally did it. I made a new 4 1/4 oz tank. Took a new 4 1/2, ground it down. Good thing I removed the end cap. The inside of this NEW tank was filthy, the uniflow misaligned, and the over flow stuck so far into the tank, no way could one fill it..  So I cleaned  it, realigned the uniflow, shortened the overflow and made the tank 1/4 inch shorter. It was a nice fit in the model. Now to test fly it. Stay tuned. 

Hmmm, kinda makes me wonder if the original tank - the one that gave you fits - also had plumbing issues?

Hi Alan.
(snip)
 and that fuel is a no no for the Aero tiger. (snip)

Hi Ty,

That statement is very curious.  All castor in an ABC, ball bearing engine?  Randy would chew my butt for a month..............  

Sig Champion or the "new" Sig Special Blend.

BIG Bear
RNMM/AMM

The saga forwarded and ended, same day.  At the St Louis contest I got in the air, did a fair pattern and ran 7.34. This on a 4.25 oz tank. Windy and gusty with the typical turbulence. Second flight, blam into the ground inverted at the bottom of the third outside loop. Did I mention turbulence?  The poor guy that flew right after me totalled his in the same spot. I think the trees close to the circle caused some strange air currents. It happens. Just before my flight, it was calm, then I entered the ring..... 

Ty,
Was sorry to see your crash.  I didn't total mine after you, just busted the rudder and ruined a good 3 blade bolly.

James