C4Tom said:
To get a true corrected you would need temp, humidity, altitude.
I don't know the calculation though.
magoo said:
The airport at Grand Bend is 640 ft. above sea level. I don't know how to do the calculations, but I know Mic will. Hope this helps.
Mike
P.S. Lets not hijack this thread, but Mic I enjoy your C-4 posts.
i'm glad some read what i post
all you guys that hear me talk about DA here is your quick lesson
here is what i use to get the corrected altitude and with the formula i use.
to calculate DA i use this calculator.
http://wahiduddin.net/calc/calc_da.htm
and good ole
http://www.weather.com to fill in the blanks
then for every 1000 DA subtract 1 tenth down to sealevel and thats what you would normally run. for every 1000 feet less altitude = 1 tenth or .1 quicker.
lets just say if it is 95 degrees when you ran at 640' with an barometer of 28.80" and a dewpoint of 94 degrees (hot and very humid/sticky) your looking at a corrected altitude of 5055' and by my calculations your 13.7 went to a 13.2 which would put you right on par with a new STi.
it also works backwards. so now you know what you are running at sealevel....
so now you run a 13.2 at sealevel in good air. what if you get sub basement air like i get at 200' alt? lets say you are running in 45 degree air with a barometer of 30.77" Dewpoint at a dry 35 degrees now your DA comes to -1019 which means now your knocking on 13.0's using 640' for your base altitude. here in the mid atlantic we see sub basement DA as low as -1700+. if i didn't have MAF/Fuel problems i my new times woulda/coulda been a 12.7 @ 108 mph
don't quote me on any formula's. they are my own and can not be copied. they are up in my head and the only way i know these things is cause i know them. i am no rocket scientist/mathmetician/genious, just part redneck :gap been around racing all my life.
