The New and Improved Quarter Mile List (Page 10/76)
Christine DEC 03, 10:38 PM
Has anyone factored in altitude?
Altitude does have an effect on ¼ times, so I am interested in knowing the altitude of the tracks where the times were taken.
Here a couple of calculators I found check them out and give your opinions about them.
Feel free to add any interesting info you have about ¼ mile time and altitude.
I am in Denver and Bandimere is west of Denver at around 5,860 feet above sea level so for example if you ran 12.5 at sea level you may run a 13.5 at Bandimere. http://www.bandimere.com/index.php
http://www.gnttype.org/techarea/misc/altitude.html
http://www.wallaceracing.com/Calculators.htm
http://www.wallaceracing.co...rrection-quarter.php
http://wahiduddin.net/calc/calc_hp_dp.htm
I just thought this was kind of cool.
http://www.tagrace.com/joom...icle&id=45&Itemid=58

Sources for some of my information.
http://forums.maxima.org/1-...-da-step-inside.html
http://clublexus.com/forums...wthread.php?t=384802

Christine
HC DEC 03, 11:13 PM

quote
Originally posted by Christine:

Has anyone factored in altitude?



That would only be correct for naturally aspirated motors. Everybody at the top has a snail or a blower.
Blacktree DEC 03, 11:32 PM

quote
Originally posted by FieroGTguy: PS- I'll post scan's by this weekend.


Did you forget?
riceviper DEC 04, 12:14 AM

quote
Originally posted by CowsPatoot:


I took the video. There is certainly no camera trickery there....the only way that time would not be accurate is if the timing at Milan Dragway was innacurate. It was his second pass of the night. First pass he pulled high 12s after shutting it down just past the launch when the other car blew the engine (I have that video too, but have to wait till I get home to get it). I can't comment on whether he is BSing about the amount of juice.....I never verified that.

I just wanted to make sure I understand what you are saying here. A member posts a photo of a timeslip that shows all his numbers, plus a video that matches that timeslip perfectly, and you are still questioning it?

Edit....I appologize for my harshness there. I now see what you mean by "is actually an image icon from the forum". He originally posted the actual timeslip here: http://www.fiero.nl/forum/F...1/HTML/069402-3.html

This images is larger than 153600 bytes. Click to view.





He is not saying that the time didn't read on the board, he is saying that something in the timing system didn't work correctly. Here is a great example you said that his first pass was a high 12. That is probably about right for the mph he was pulling. If you could please post that run, and if possible the 1/4 et, and mph, but most importantly his 60 ft. This will deffently anwser if FieroX assumptions are correct. I will tell you this I deffently think he is right go look at cars that go 12.2 and compare there time slips to DH. He is way slow i mph, so the oly way to make that up is to come out of the hole like a bullet like a 1.51 60 ft, and hate to say it his wasn't close.


quote

Has anyone factored in altitude?
Altitude does have an effect on ¼ times, so I am interested in knowing the altitude of the tracks where the times were taken.
Here a couple of calculators I found check them out and give your opinions about them.
Feel free to add any interesting info you have about ¼ mile time and altitude.
I am in Denver and Bandimere is west of Denver at around 5,860 feet above sea level so for example if you ran 12.5 at sea level you may run a 13.5 at Bandimere



Altitude has nothing to do with this heres why. Obviously the lower the altitude the denser the air, thus more horse power ad torque. Though it effects et and mph linear, so at sea level with dry air he might run 12.0@115 and at altitude with moist air 13.5@102. The problem is mathematicly his car with not run a 12.2@108 with a 1.85 60 ft. His car probably ran like a 12.7@108. The mph and the et just dont add up. If you wanna test it tell him to to ru his car back to back. I bet it would't run a 12.2 ever.

quote
Originally posted by HC:


That would only be correct for naturally aspirated motors. Everybody at the top has a snail or a blower.



This statement is incorrect, altitude still effects boosted cars trust me I know my vr4 here in wichita will run 12.40's multiple times, I went to colorado and at same setup even with 2 more lbs of boost could't get into the twelves. It just the lack of oxygen compared to normal altitude. Just remember all a power adder is a way to ram more oxygen into the engine, but if there oxyge isn't there it doesn't matter how much air is push into the motor it will make absolutely no difference.


Anyways I would like to see a video of DH car running anywhere near what the one pass was, because I bet that video does't exist. I would bet that his car is a 12.70 at best.

[This message has been edited by riceviper (edited 12-04-2008).]

Christine DEC 04, 12:46 AM

quote
Originally posted by riceviper:

Altitude has nothing to do with this heres why. Obviously the lower the altitude the denser the air, thus more horse power ad torque. Though it effects et and mph linear, so at sea level with dry air he might run 12.0@115 and at altitude with moist air 13.5@102. The problem is mathematicly his car with not run a 12.2@108 with a 1.85 60 ft. His car probably ran like a 12.7@108. The mph and the et just dont add up. If you wanna test it tell him to to ru his car back to back. I bet it would't run a 12.2 ever.




I was just asking about altitude in general, I am not involved in the debate about whose time is correct or verified. I was not referring to anyone in particular; I was just posting what I found to interesting information about ¼ mile times at altitude.

For example if I ran a ¼ mile at Bandimere my time would not be as good as it would be in say Florida. I just thought it was something to think about because if everyone on the list was running the ¼ mile at a 1,000 feet in altitude or less the difference would be negligible, but anyone running ¼ mile time at higher altitude they could do the calculator and see what the improvement in their run time might be at sea level. Maybe I will run at Bandimere next summer and then drive to a lower elevation and see what the difference is.

Christine

riceviper DEC 04, 01:01 AM

quote
Originally posted by Christine:


I was just asking about altitude in general, I am not involved in the debate about whose time is correct or verified. I was not referring to anyone in particular; I was just posting what I found to interesting information about ¼ mile times at altitude.

For example if I ran a ¼ mile at Bandimere my time would not be as good as it would be in say Florida. I just thought it was something to think about because if everyone on the list was running the ¼ mile at a 1,000 feet in altitude or less the difference would be negligible, but anyone running ¼ mile time at higher altitude they could do the calculator and see what the improvement in their run time might be at sea level. Maybe I will run at Bandimere next summer and then drive to a lower elevation and see what the difference is.

Christine




You are absolutely right that that it will make you faster if you are at a lower altitude, have dry air, and have cool air temps. There are so many factors its crazy. Though you should you will be a able to tell a difference.

Christine DEC 04, 01:13 AM
riceviper what is the elevation at the 1/4 mile tract in Wichita? I was in Kansas for Wheatstock, it is not that far from Denver about a days drive, if it is low enough it might be fun to run a Bandimere and then drive to Wichita and see how the times compare.
riceviper DEC 04, 01:26 AM
Ya it would deffetly be worth it. Come next spring we will be shootin for the 9's! Not to metion you cold come by the shop and check it out!
fieroX DEC 04, 01:50 AM
Wichita is at 1320 feet ironically. I looked over the timeslip, numbers sort of add up. I guarantee he is running more nitrous that he is saying. His 1/8 mile time calculates to 12.15, but his 60' doesnt. So his power from the 60' to the 1/8th is really good. From the 1/8th to the finish, the acceleration sucks. His mph shows it. If I had to guess, I would say he is running a 100 shot, but up high he either ran low on nitrous, or his car went lean and started slowing down. Like I said earlier when I ran 12.20's I was going 110+ mph, with 1.66 60's. Only way I see him running the same times with slower 60 foots and slower trap speeds, is by having wicked mid range power.

Now since ive seen the timeslip, I believe it a little more, but I think someone is stretching the truth on the actual mods. Ive been playing this game way to long to get duped.
Christine DEC 04, 02:02 AM
FieroX, as fast as your car is I do not think anyone is going to take the top 1/4 time from you aany time soon if ever. If I come to Wichita I will race you but I know I will not even come close to your times, I only have a 350HO crate motor with a 4T60 Trans. no NOS or anything else it is just a out of the box motor the specs say 330HP and 380FT lbs so I think I will be in the 13s or if I am lucky 12s.

1,320 is alot lower than Bandimere so it would be interesting to see the differance.

Christine