GASGZLR

I ran at the track this weekend and my car ran a corrected time of 11.7 @ 126.7 mph on street tires and a 2.0 60 foot. I borrowed a pair of Hoosier 29x10.5 and set the pressure to 19 psi and ran a corrected 11.49 @ 120.mph with a 1.799 60 foot on only a 75 shot of N20.

Our track is 5500 feet and the DA that night was 7900 feet plus it was 81 degrees.

MdFormula350

t-5 holding strong?!


excellent times.

unknown_host

iTrader: (1)

Those numbers dont add up to me. I am a big fan of vortec combos, but you have to be wrong about the track DA that night. 5500 foot DA (not even 7900) converts your first mph to 135 mph. To make a 3400 pound car (assuming yours is pretty light) trap 135 takes around 700 horsepower...

Your second ET converts to a 10.70 at 5500 foot DA (again, not even 7900 DA). It would still take well over 650 horsepower to put down those kind of #'s, and your car doesnt 60 foot like a 10 second car should.

Not saying you are lying but are you sure you are only jetted for 75 horsepower?

five7kid

iTrader: (14)

He's giving corrected-to-sea-level times/speeds.

25thmustang

What were the uncorrected times?

five7kid

iTrader: (14)

https://www.thirdgen.org/techbb2/sho...hreadid=249220

Using the NHRA correction factors for 5800' elevation (what I've saved in my PDA for my Bandimere #'s), I come up with 11.87 @ 122.8.

The published NHRA correction factors are for elevation, not DA.

five7kid

iTrader: (14)

By the way, the correction factors are for NA only. NO2 skews those factors because you're giving it all the oxygen and fuel it would get at sea level while you're spraying. Only the non-spray numbers should be corrected.

unknown_host

iTrader: (1)

Well he should say so. What were the uncorrected times?

25thmustang

He did...

unknown_host

iTrader: (1)

My bad

MrDude_1

see, i have a solution for all of this "corrected" stuff...


i run at sea level

actually, im currently slightly below sea level.

five7kid

iTrader: (14)

The Summit ET Division V Finals were held at Bandimere last year. While waiting at the gate to sign in Thursday morning, I got into a conversation with a 3rd gen flat-lander. I asked him what he ran at home, he said 11.4's; I pulled out my PDA and said, "You'll run 12.3's here." The look on his face was, as they say, "priceless". As was later in the day, after he'd made some runs and done some tuning, and his best time was (drum roll, please), a 12.33.

Those "corrected" numbers are for your benefit - so you understand our timeslips and give us credit for what we've accomplished.

GASGZLR

DA was 7900 feet, temp was 81 degrees F, and humidity was around 10-15%. I have a drag program that I entered my times into and then hit "optimum track conditions" and it gave me an 11.47 @ 126.xx mph. I know it would not run that exactly but it would be in the 11's for sure at sea level. I actually ran a 12.80 @ 113.9 mph with a 1.96 60 foot. I was trapping 113 consistant on pure street tires. I know if I had a good set of 26 inch tall slicks, my car would have gone 12.30's uncorrected. Timing was at 33° with the 75 shot and it ran great. I am thinking about going to 34° and spraying.

My T-5 and 10 bolt are in great shape, and I did not spray off the line. When I had those monstrous tires on my car I would cross the traps in 3rd gear and my speedo would say like 95. I would freak and think I only ran low 14's but I forgot that 29 inchers would mess with the speedo reading.

five7kid

iTrader: (14)

Most likely your drag program assumes NA as well.

You gave temp & humidity, what was the barometric pressure?

Two years ago, when I ran the season in Colorado and one weekend in Topeka, the NHRA correction factors for elevation only were dead on.