How much is good air worth?

Happy Thanksgiving everyone!

Loaded up this morning to head to the 3-day Thanksgiving race in Dallas.



It was a blustery 28 degrees in East Texas this morning! The last time out we ran a PB of 11.74 (1.53 60') with a DA of 1850'. This morning the DA was NEGATIVE 1800'. It's supposed to stay well below sea level the next several days. Assuming they prep the track correctly and that it hooks how much ET is there in a swing of 3600'?

Hope each of you have a safe and peaceful Thanksgiving Day with your friends and family.

Scott

[Don Higgins]

It will be fast, however you will run into the "law of diminishing returns" where the car simply can't go any faster, regardless of DA. My quickest ETs are at -400 DA when the Baro was 30.20. I ran in -1200 DA and the car was no quicker.

Make sure you give it plenty of fuel....

[gbur]

you shall see

[countrypuppy4865]

From my experience, our cars would probably pick up .15-.20 in those conditions, but as Don said you can get to a point when the air is so good it doesn't make much difference. Every car is different, you just have to learn how your car is effected, which you should today.

[Jeff Teuton]

+1800 to - 1800. 2 tenths. Give it some fuel. Take away some timing. Both.

[Dan Fahey]

My car runs better at lower DA.
But you have to add in Moisture content that takes away the Oxygen if you have equals DA readings.
Cold dry days are best with high Barometric readings and very low humidity.

Learned a lot from flying planes. Especially in Denver on hot days.
Fully loaded private prop planes without a TC cannot take off.
Prop can't generate enough bite and the wing enough lift.
DA readings can be several thousand feet higher.
Barometer readings in the 26 range.

Coastal tracks you can see better DA than middle America.
Strange that Cecil County Dragway is 500 ft above sea level.
But Cold Air Day Drag days see DA's as low as 2000ft below sea level.

East coaster love to go to that track for bragging rights.
Racers from Ohio take the treck out every year just for that experience.

My best on Cool airs are consistent Low low 13's.
Managed a 12.88 at Cecil. DA -800ft
Where at Pittsburgh last Summer ran 13.80's hot lapping, in the morning a 13.65 cold.
DA was reported near 4000ft.

D