Quote:
Originally Posted by Jordo!
One more set of charts that is very informative -- oberve the effects of heat, humidity, and air pressure on dyno numbers. SAE corrected and uncorrected below.
All of these runs are same car, same mods, same tune, same dyno, but different times of year -- highest values were obtained in January, next highest and closest was from yesterday (end of October), and lowest was in the dead of summer!
This is Florida... imagine the differences in power over the year in places where they actually have seasons 
Oh, and BTW, as you can see, even using a correction factor, you get very different numbers depending on ambient conditions.... something good to keep in mind. |
Another nice comparison graph -- this one shows the changes in measured torque in three different gears.
Note that from 3rd to 4th is about 4% change, and from 4th to 5th about a 2% change in peak torque.
Something to keep in mind when comparing one dyno to the next or when comparing your own runs.
So before swearing by a mod, or swearing off a mod, remember to consider similarity in ambient temps and air pressure (even with correction, as we see above, you get massive differences) and also what gear each run was done in
