Boucher,
As you know,the hotter an engine gets the less fuel it wants, I thought you said when you were at temp your A/F was 10:1 too rich, but at full boost it ran good ?
If it goes fat just at the transitition it could be pumps or squirters a white cam is very little fuel.
Could be the high speed air bleads are too small and goes to the mains too soon, the air bleeds control the timing of the fuel, but try this very last.
Harry
