I think mid 13's is a bit optimistic for that combination. Mid to low 14's is more realistic IMHO. One thing you have to keep in mind is that dyno horsepower horsepower numbers are corrected to 50ﾟF at sea level. Unless you were racing in that kind of density altitude, the car will be slower than the dyno and and the calculator indicate that it will be.
Look for SAE correction instead of STD correction on any type of dyno sheet, they can usually correct to both. STD isn't realistic, while SAE is more representative of real world conditions.
