How much is good air worth?

[Lee Valentine]

At times you get DA readings that look awesome but the ET's aren't what your predictions tell you. This usually caused by a cool temp reading but baro. and humidity aren't that great, happens at Maple Grove and Atco frequently.

[art leong]

At the Gator's this spring. The temps were in the low 70's but the humidity and barometer were killer. So it was a mineshaft.

[Ed Wright]

My old Tag weather station does not give enough weight to humidity. It always predicts too fast in humid conditions. If I wasn't done I would find something better.

[Chad Rhodes]

Originally Posted by Ed Wright

My old Tag weather station does not give enough weight to humidity. It always predicts too fast in humid conditions. If I wasn't done I would find something better.

You're not done, you just think you are

[Todd Geisler]

I'm wondering if D/A is simply not D/A and comparing isn't as accurate as I once thought.

Tested at MIR on Oct 20th.

1.136 60'
3.227 330'
5.011 660'
137.22 mph

58.6 deg
57% humidity
29.82 barometer
354' D/A
42.50 grains

Now at a race at Cecil on Nov 2nd

1.136 60'
3.221 330'
5.002 660'
137.25 mph

57.4 deg
55% humidity
29.29 barometer
851' D/A
39.14 grains

The very next run at Cecil the car set the class record for an N/A car of 4.988.

I sit here comparing weather and at Cecil the barometer was way lower and higher D/A but the car still ran quicker. Scratching my head over this as when I looked at the weather station every run I expected the car to run slower than it had at MIR based on the air.

And I never did get to run in what I feel is mineshaft air this fall. Probably a good thing as I got hit with 50 lbs for running what it did. lol

Well, turns out the race is 1/8 mile. Did not know that. My wife Wendy is learning to drive the car and did well today only having 5 passes in her life under her belt. Broke out first round and lost after a 0.519 light.

After she lost I jumped in the car for some 1/4 mile TNT. New PB on everything: 1.50 60', 7.29 1/8 and 11.58 1/4. No mph on the ET slip. ??? DA according to my phone was -100'. Haven't checked Drag Race Times' web site yet.

Sun starting to set and going to get cold but we are going to try to get some more runs tonight if the starting line doesn't go away.

Scott

[Dave Ribeiro]

Scott,

I think Jeff,Jimmy Jr. & Dave were right on two tenths .. As you know there are many other factors that enter in this discussion .. But, their est. was right on, no sub for experience ... Good Luck testing & write it all down !!

Originally Posted by Dave Ribeiro

Scott,

I think Jeff,Jimmy Jr. & Dave were right on two tenths .. As you know there are many other factors that enter in this discussion .. But, their est. was right on, no sub for experience ... Good Luck testing & write it all down !!

Yep, they were right on it! Here we are on Friday ...


After our last TNT pass Friday night the Check Engine Light came on and the codes indicated the oxygen sensors had gone out. We packed it up and came home and will replace those this week.

Scott

[Ed Wright]

Any good tuner cam make the O2 sensors have no effect on WOT performance. Or, you could have just unplugged them to finish the weekend.

[Chad Rhodes]

Originally Posted by Ed Wright

Any good tuner cam make the O2 sensors have no effect on WOT performance. Or, you could have just unplugged them to finish the weekend.

Or gone to the auto parts and just changed em. It's not that hard