Originally Posted by mileage
hi can i run the sirio xxxv out of the box it says 10 tanks was put through and it is track ready
I would first turn it over by hand to determine if you would run it as if it were new:
If you can pop it over and it doesn't feel like there is a metal to metal contact, just really good compression, then I would run it slightly rich 2 tanks and then go balls-out!
But if it feels like there is a pinch near TDC, then run it rich for 5 tanks or so until you can feel it richening up and when you feel that the pinch has lessened.