1/4 Time vs. Altitude
12-12-2003
#1
Thread Starter
Registered!!
Joined: Aug 2003
Posts: 1,151
Likes: 0
From: El Paso, Tx
Rep Power: 0 
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??
12-12-2003
#3
Joined: Jul 2002
Posts: 13,151
Likes: 3
From: Washington DC
Rep Power: 406 
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.
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.
12-16-2003
#7
Joined: Jul 2002
Posts: 13,151
Likes: 3
From: Washington DC
Rep Power: 406 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
It was just a simple question, I don't need really need a scientific explanation or to go look up equations or tables. THANKS
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.
12-16-2003
#8
Autocross Junky
Hey! Look At Me!! I'm a Supporting Member!!
Joined: Oct 2002
Posts: 7,211
Likes: 0
From: Las Vegas, Nevada, US
Rep Power: 362 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
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.
12-16-2003
#9
Registered!!
Joined: Jul 2003
Posts: 3,200
Likes: 0
From: Fontana, CA
Rep Power: 0 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
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
12-16-2003
#11
Thread Starter
Registered!!
Joined: Aug 2003
Posts: 1,151
Likes: 0
From: El Paso, Tx
Rep Power: 0 Originally posted by Boilermaker1
I don't feel like looking for it because I don't care.
I don't feel like looking for it because I don't care.
12-16-2003
#14
Joined: Jul 2002
Posts: 13,151
Likes: 3
From: Washington DC
Rep Power: 406 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.
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.
12-16-2003
#15
Autocross Junky
Hey! Look At Me!! I'm a Supporting Member!!
Joined: Oct 2002
Posts: 7,211
Likes: 0
From: Las Vegas, Nevada, US
Rep Power: 362 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.
12-17-2003
#16
Registered!!
Joined: Jul 2003
Posts: 3,200
Likes: 0
From: Fontana, CA
Rep Power: 0 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 
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
12-17-2003
#17
Thread Starter
Registered!!
Joined: Aug 2003
Posts: 1,151
Likes: 0
From: El Paso, Tx
Rep Power: 0 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.
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.
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
12-17-2003
#18
Joined: Jul 2002
Posts: 13,151
Likes: 3
From: Washington DC
Rep Power: 406 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?
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.
12-17-2003
#19
Thread Starter
Registered!!
Joined: Aug 2003
Posts: 1,151
Likes: 0
From: El Paso, Tx
Rep Power: 0 
Boilmaker, I already got the information that I needed yesterday. Try not to make things so hard for yourself. 
12-18-2003
#27
Addicted to the Twisties!
Joined: Jul 2003
Posts: 3,693
Likes: 0
From: Littleton, Co
Rep Power: 296 Originally posted by civic01vtec
Both of u are wasting my time.......LOL
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
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
Wild Cranker
Mechanical Problems/Vehicle Issues and Fix-it Forum
1
05-19-2015 06:10 PM
werdnahall
I.C.E. (Audio) & Electrical Upgrades
11
05-17-2015 11:37 AM
