Re: How Much Does Density Altitude Affect ET
 

So at the same DA the percent of oxygen can be different?

How do you measure the percent of oxygen?

Thanks

Re: How Much Does Density Altitude Affect ET
 

There are many different combinations of Temperature, Relative Humidity, and Barometric Pressure that will give you the same Density Altitude, say 2500 feet. The car should perform similarly in any of those combinations that equate to a DA of 2500 feet, but it can vary depending on the exact makeup of those measures.

I'm pretty sure your weather monitor needs to have an oxygen sensor if you want that info.

Re: How Much Does Density Altitude Affect ET
 

You have to have a weather station that measures the percent of oxygen. I know Altronics has them as an option.

I mostly look at the humidity and the barometer to make comparisons. The 327 engine that I am running is much more difficult to dial than the 350 that I have. Must have something to do with the shorter stroke.

Re: How Much Does Density Altitude Affect ET
 

Patrick Hale's book is very helpful and has lots of information on this subject.

http://www.dragracingpro.com/site/90...ooks.html#2859

Re: How Much Does Density Altitude Affect ET
 

the link doesn't work for me ???

Re: How Much Does Density Altitude Affect ET
 

Try this one...

http://www.dragracingpro.com/Books.html

Re: How Much Does Density Altitude Affect ET
 

With a oxygen meter there was a company in the Baltimore area the sold them. I will do some digging and post there name.

Re: How Much Does Density Altitude Affect ET
 

Right there with you Jimbo, I just recently came to the same conclusion!

Re: How Much Does Density Altitude Affect ET
 

thanks;)

Re: How Much Does Density Altitude Affect ET
 

What do you use.
DA OR CF
AND WHY