[Daytona]

Factors affecting launch/final ET's:

1. wheelspin off line
2. launch rpm
3. shift points
4. head wind vs. tail wind
5. launching "in the groove" vs. launching "out of the groove" (This means aligning your front tires directly in line with strips of rubber laid down by cars with slicks running before you)
6. changes in air quality: density (i.e. relative altitude), humidity (the bane of fuel injected cars), & temperature.
7. Changes in engine and trans temps
8. fuel quality (poor quality gas can cause inconsistent detonation in older engines and when the air quality isn't good, affecting consecutive runs greatly)