Elavation and Time

[sweetdiesel]

what is the ideal track sealevel?
i understand the higher you go the less oxygen
can you put that in to a time frame forsay?
do some tracks correct for this?

 

[Kat]

Yes, sea level tracks are the best. Even better is a cold sea level track where the get negative DA in the winter

Some of the quickest tracks are HRP in Tx, Atco and English Town on the east coast.

I believe it's .10 per 1000 ft of altitude at least a naturally aspirated car. I think in the diesels it a little less.

These are a couple of Calculators I have used for the Car.

Corrected ET/Trap Speed Calculator
http://www.modulardepot.com/density.php

Density Altitude Calculator
http://www.modulardepot.com/density2.php

 

[hdmax]

The altitude effects a turbo a lot less then a naturally aspirated vehicle, so with that said, I would think the effect would be much closer to .05 per 1000 feet. But I don't think there has been enough testing of turbo charged vehicles to know the effects of thin air.

 

[sweetdiesel]

Yes, sea level tracks are the best. Even better is a cold sea level track where the get negative DA in the winter

Some of the quickest tracks are HRP in Tx, Atco and English Town on the east coast.

I believe it's .10 per 1000 ft of altitude at least a naturally aspirated car. I think in the diesels it a little less.

These are a couple of Calculators I have used for the Car.

Corrected ET/Trap Speed Calculator
http://www.modulardepot.com/density.php

Density Altitude Calculator
http://www.modulardepot.com/density2.php

thanks Kat very much this is exactly the info i was looking for

 

[Kat]

The altitude effects a turbo a lot less then a naturally aspirated vehicle, so with that said, I would think the effect would be much closer to .05 per 1000 feet. But I don't think there has been enough testing of turbo charged vehicles to know the effects of thin air.

That sounds about right.. Blue runs .30 quicker at a track that is 1100ft vs 2700ft. But the DA is most times over 5000ft on the 2700ft track.