installed the default tune and check to see what my air fuel ratio was.
it was right around 13.2and slowly went to 12.8 in the 0-4000 4000 and up it started out at 12.4 and went to around 12.7
i added 2 percent of fuel to the 0-4000 and that kept it right around 12.5-12.7
then i took out 2 percent of fuel in the 4000+ range and it was at 13.1 until around 5200 then it went to 13.5
put 1 percent back in it and went to 12.7 and leaned out to around 13.0
so as you can see the default predator tune was pretty close from the factory.
it was right around 13.2and slowly went to 12.8 in the 0-4000 4000 and up it started out at 12.4 and went to around 12.7
i added 2 percent of fuel to the 0-4000 and that kept it right around 12.5-12.7
then i took out 2 percent of fuel in the 4000+ range and it was at 13.1 until around 5200 then it went to 13.5
put 1 percent back in it and went to 12.7 and leaned out to around 13.0
so as you can see the default predator tune was pretty close from the factory.