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1/4 Time vs. Altitude

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Old 12-12-2003
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Question 1/4 Time vs. Altitude

I live in El Paso, TX where like in some other cities it is not sea level. I have heard that if you run the 1/4 in a non-sea level place that it would be slower than running at sea level. Is this true?? And if you can please explain why or why not??
Old 12-12-2003
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higher elevation places will make your 1/4 time higher
Old 12-12-2003
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The air is thinner. You're putting less oxygen in the engine, and the barometric pressure is lower. Think about it this way... at sea level, your engine is getting air stuffed into it at 14.7 PSI (standard atmosphere)
You go up 1 mile, the air pressure is about 83% of that (about 12.2 psi). Think about what happens when you drop turbo pressure 2.5 Psi... its basically the same thing on a lesser scale since you're not actually "forcing" it in, its just being pulled in by the engine's vacuum.
Old 12-14-2003
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Say one guy go's out to Las Vegas where I think it is 3,000 ft+ (if I'm not mistaken, if so please correct my dumbass) and runs a 15.7. What would he be running on sea level??
Old 12-15-2003
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Go search google. There's a correction equation or table for altitude. I don't feel like looking for it because I don't care.
Old 12-16-2003
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It was just a simple question, I don't need really need a scientific explanation or to go look up equations or tables. THANKS
Old 12-16-2003
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Originally posted by Eeeeeeh
It was just a simple question, I don't need really need a scientific explanation or to go look up equations or tables. THANKS
That IS the explaination. There is an altitude correction table for 1/4 mile times (the NHRA or someone puts it out). You look up the time, you find the altitude and you get the sea level value.
If you're too lazy or dumb to figure it out in a table or a plug and chug equation, then I'm not sure how else to help you.
Old 12-16-2003
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las vegas is between 1900 and 2200 Ft above sea level, depending where you are. the Motorspeed way (where the drag strip is) is twards the foot hills so I'd be closer to 2200 then 1900.

Parts of North Las Vegas reach 3000 Feet, I believe the actual drags strip is at 2100ft

Last edited by Zzyzx; 12-16-2003 at 12:38 PM.
Old 12-16-2003
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http://www.superford.org/garage/calc...ed_on_altitude

eh I was bored so I did a quick search and found that one. if you can't figure that out you don't need to be racing. lol
Old 12-16-2003
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Got it, thanks 00celicagts6spd
Old 12-16-2003
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Originally posted by Boilermaker1
I don't feel like looking for it because I don't care.
If you don't care then you don't have to post in this thread. I didn't make this thread to read about your fussy attitude and rude remarks.
Old 12-16-2003
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Originally posted by Eeeeeeh
Got it, thanks 00celicagts6spd
see I'm not all that bad. lol just depends on which personality is typing.
Old 12-16-2003
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The air is not as dense.
Old 12-16-2003
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Originally posted by Eeeeeeh
If you don't care then you don't have to post in this thread. I didn't make this thread to read about your fussy attitude and rude remarks.

Did I give you the explaination you wanted?
Yes I did. Whether or not you understood what I said, I don't know, but don't ask a technical question and not expect a technical answer back.

I really could care less about the correction table though. I don't run 1/4 miles, therefore I don't care what the corrected values are, so I wasn't going to waste the time to search the internet and find them. If you wanted them so badly, you could have gone and looked them up yourself.
Old 12-16-2003
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Eeeeeeh, have you ever heard the saying "ask a stupid question, get a stupid answer"? well the same kind of thing applies to a technical question, as in "ask a technical question get a technical answer".

Last edited by Zzyzx; 12-16-2003 at 10:05 PM.
Old 12-17-2003
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I drag the good ol 1320 but I don't use the correction tables either. I figure you run what you run period. if you want a correction find a sea level track and compare it.

Although technically my fastest 1/4 mile time would be a 14.27 stock, corrected lol but it only works that way for the IHRA
Old 12-17-2003
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Originally posted by Boilermaker1
Did I give you the explaination you wanted?
Yes I did. Whether or not you understood what I said, I don't know, but don't ask a technical question and not expect a technical answer back.

I really could care less about the correction table though. I don't run 1/4 miles, therefore I don't care what the corrected values are, so I wasn't going to waste the time to search the internet and find them. If you wanted them so badly, you could have gone and looked them up yourself.
If you could care less about correction table, 1/4 times, etc. And if you don't want to waste your time to search for them, then don't tell me. I made this post on disscussing information on this subject, not to hear you go "I could care less" "I know that the correction table is out there but I don't wanna search so I am not going to waste my time."

Now You are wasting my time. If you don't care so much, then why in the world are you telling me this? I don't wanna read that man. Don't you think that makes you sound like an *******?

Look, I got the info that I needed from 7th Gen's favorite celica owner So you can stop taking up space, and more importantly: waste MY time
Old 12-17-2003
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Alright.... if you wanna be a lazy bitch and not look for the ****ing table that YOU want to see then fine.
Heres the ****ing NHRA correction table.
http://www.gnttype.org/techarea/misc/altitude.html

I really don't think it makes me sound like an *******. I think it makes you sound like a lazy idiot. You are the one who wants to learn something, yet you are unwilling to go out and find the information. You're just sitting here and waiting for someone to hand it to you.
Interpolate between values:
(Your altitude-lower altitude)/(higher altitude-lower altitude)=(X-CF lower alt.)/(CF higher alt.-CF lower alt.)

CF is the correction factor
X is what you solve for


I wouldn't have cared at all if you went, found it and were confused by it, and needed something explained. But if you're not willing to do anything to learn it, why should anyone else be willing to help?

Last edited by Boilermaker1; 12-17-2003 at 08:49 AM.
Old 12-17-2003
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Originally posted by 00celicagts6spd
http://www.superford.org/garage/calc...ed_on_altitude
Boilmaker, I already got the information that I needed yesterday. Try not to make things so hard for yourself.
Old 12-17-2003
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Both of u are wasting my time.......LOL

sorry, i just had to be nosey
Old 12-17-2003
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^^Yeah I know. What were are going back and forth over is pretty stupid anyways. LOL
Old 12-17-2003
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yeah, i was laughing the whole time......u tools .......hahaha
Old 12-17-2003
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come on this is 7thgen.com racing forum, if theres no flaming then no ones talking.
Old 12-17-2003
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^^^ screw u celica guy........LMAO......just ****in wit ya.
Old 12-17-2003
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everybodys a comedian geez. lol
Old 12-17-2003
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Originally posted by 00celicagts6spd
come on this is 7thgen.com racing forum, if theres no flaming then no ones talking.
Celica Man, I couldn't agree with you more
Old 12-18-2003
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Originally posted by civic01vtec
Both of u are wasting my time.......LOL


LMFAO...you two sound like two kids! lol


But yeah...Boilermaker's right..."ask a tech question...get a tech answer" and you should expect nothing less IMPO.

I hate it when I ask a question and I get all these stupid obvious generic answers..like

"What tire pressure's best for Auto-Xing?"

and get

"What ever it says on your tire!"

**** like that! lol
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