grogan545

I have read several more articles on weather corrections for drag racing.I really have to reread and try to digest what they are saying.As you have said before at the moment they are"over my bow".Some racers actually take their weather station to the starting line with them.They are not satisfied with the stationary weather equipment at the site.

das

I've deleted some posts in this thread.

Please, don't attack one another, and if something doesn't interest you, ignore it. Let other people talk about the things that interest them.

Thanks.

znod

Thank you das.

znod

Cool. I'd like to know what you find out. I think I'll get a weather station.

grogan545

I will do more research on effects of weather but I think the article I read is splitting hairs.It applies to Pro drag racers who are concerned with .01 sec differences.I think for our purposes the closest airport weather data is sufficient.They mentioned even to not use your friends weather station because it may not agree with yours.If the stations are inaccurate enough to cause a significant difference you may as well depend on the local airport info.

I will be out of town next week so no further testing until I get back.But I do intend to test over various conditions to see if the corrected numbers are at least reasonably close.

I also did some "donkey math"(math without basis in fact)on estimating corrected 0-60 Time.If you take the diff between your raw & corrected 1/4 mile et's and either add or subtract(depending on the direction of the correction)this diff to your 0-60 time it comes out pretty close.I did this on every run that I had data on and it was within .03 sec with only 2 exceptions which were about .1 sec.I did by comparing my uncorrected times times to ea other and used this method to check the 0-60 time against my known times.I hope I didn't confuse you.Example:
14.109 raw et,0-60 time 5.65 sec(my drag strip times)
13.45 corrected et
.659 diff
5.65-.659=4.99 sec corrected 0-60 time
Looking at one of my 5.00 times I estimated 1/4 time of 13.45
Diff of only .01 between actual 0-60 and estmated 0-60

znod

Try to stay in touch while gone. I see what you mean about donkey math. I have been thinking about decent ways to get corrected zero to 60's also. No real progress yet. Did your slip show zero to 60, or was this reading from your meter? Regardless, I don't see why the diff in 1/4 raw versus corrected would equal diff in zero to 60 raw versus corrected. But, I'll see if I can justify what you are saying. Maybe I don't understand what you are saying.

grogan545

Hi Znod,
The 0-60 time on my drag strip run was from the GT2.The strip doesn't measure 0-60.I found no scientific justification for the 1/4/0-60 correlation,It just seems to correlate better than any other method that I tried.The factors derived from the weather corrections don't come close.Maybe I don't understand what I'm saying either.I used this method on all of my runs that I could and tried it on some of your runs also.It is not perfect but more times than not it is less than .05 sec diff.I am sure there is a math solution to this but to date I have not discovered it.

I will try to stay in touch next week.I will be traveling for work with a friend who has a lap top(I don't).I am sure I can find time in the evenings to keep up with the latest.

znod

I haven't had time to check your method out, but I will do so soon. Yes, and, do keep in touch. Who knows? There might be some excitement.

cobradav

I am back from travel, but no meter yet. I got mine back in their hands Monday last so I do not expect my replacement until sometime next week. I wanted a chance to get down some good baseline before I get into CIP 20.xx which looks now like March 10/11 time frame.

I'll be sure to gather Wx data as well, although I believe all my runs will be at sea level or below (during hurricane season).

znod

Great cd:

I just ask questions about all of what you said on another thread.