I also did the 8 times idle on the starter box thing, and after that try to drive around the track slowly and encountered the same problem as you. I had to lean the LSN needle about half a turn and an entire turn on the HSN, just to get the car moving at walking speed. Still lots of fuel spitting out of the exhaust, and very little smoke (which, in combination with a *very* rich tuned engine means it's not getting up to normal working temperature, but it is flushing lots of fuel through, and any possible debris with it). I ran another two tanks that way, and then started to gradually lean it out to get the operating temperature close to 100 degrees celcius.
Now, the engine has about a liter of fuel through it and it is running fine. If I tune it for good performance, running temperatures are usually around 110 to 115 degrees celcius.