Questions about dyno?
10-06-2007, 02:59 AM
#1
Questions about dyno? I just got my dyno today, using a mustang dynamometer. 303 peak torque, 262 peak hp. From what I've seen, thats pretty low, but it got me thinking. Do mustang dynos (or any dyno for that matter) account for elevation? The elevation at the shop is 3000 feet. There was also 40% humidity. So do I have a slow *** ls1, or does the elevation affect my car this much. A/F was also about mid 12's across the whole rpm range, spiking up to 13.9 at around 5200 rpm. Thank you.
10-06-2007, 01:49 PM
#2
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If they gave you SAE or other corrected numbers, then it is corrected for temperature and pressure.
Heres some write-up:
http://www.ls1.com.au/forum/showthread.php?t=58222
Heres some write-up:
http://www.ls1.com.au/forum/showthread.php?t=58222
Last edited by machinistone; 10-06-2007 at 01:56 PM.
10-06-2007, 09:32 PM
#3
Well looking at my dyno sheet, I don't see anything relating to SAE corrected numbers. Am I to assume these numbers are un-corrected? If so, is there a calculator that will help with corrections? I believe there is one on here...I just have to search for it. If I find it, I will post up corrected results.
EDIT: I found this link http://wahiduddin.net/calc/calc_cf.htm and according to that...if I did it right...corrected numbers are 287 hp and about 330 torque. One question on that link though as well, it asked for vapor pressure, and there isn't one listed on my dyno sheet. I used the psi number, and if thats the case, it was .2, thus what I used for the calculator. I'm still wondering though, about how much elevation has to do with dyno numbers.
EDIT: I found this link http://wahiduddin.net/calc/calc_cf.htm and according to that...if I did it right...corrected numbers are 287 hp and about 330 torque. One question on that link though as well, it asked for vapor pressure, and there isn't one listed on my dyno sheet. I used the psi number, and if thats the case, it was .2, thus what I used for the calculator. I'm still wondering though, about how much elevation has to do with dyno numbers.
Last edited by AznMuscle; 10-06-2007 at 09:44 PM.
10-07-2007, 02:45 AM
#5
I did ask them if it was SAE corrected.....he said that the dyno does take into concideration the temperature, humidity, and pressure, but didn't say about the altitude or if it is SAE or STD corrected. My sheet doesn't say anything about corrections...just states speed, temp, pressure, humidity, and psi?? Don't know what that one is about.