corrected numbers better for tuning?

[jmakado]

before the preachers start preaching hear me out. i was reading some threads from ranters crying about corrected numbers and how they don't mean shit and blah, blah, blah. and then it dawned on me: corrected numbers are *corrected* for the current conditions at the time of the run. if you run in 60* one day and 100* the next you will get some pretty different numbers uncorrected right? so how will you know if you're making any progress? if the numbers are corrected then you will have a better idea of what is making more power and what is not.
let the ideas flow.

[sbiggi]

corrected numbers are good for comparing against previous runs and other cars on that particular dynoshop....

they arent good in our case for comparing against cars not at altitude. They also vary dyno to dyno.

[DlandryTSI]

If you want to compare your tuning from previous days you can go by corrected and the uncorrected numbers.

But if you want to show people the actual power put down up here then uncorrected is the way to go.

However if you are comparing the results from a run in CA to a run here in CO you have to use the corrected values.

--Dave

[KeltonDSMer]

BoostedTSI is totally right in the fact that all dynos are different.

A recent series of dyno tests done by either by SCC or Super Street (I can't remember) showed how much they can vary. The Mustangs, Dynojets, and HKS dynos all showed very different numbers. Hell, even the two HKS dynos they showed had significantly different results because one had the low mass rollers and one had the high mass rollers. I think the tests were done well because the car was a Ford Ranger that they were able to test the 2WD numbers and the 4WD numbers on each dyno.

It is really hard to compare cars unless they are tested in the same conditions on the same dyno. Corrected numbers try to even these differences out, but I think there are too many variables to make comparisons valid with them.

[jmakado]

i agree that they need to be used on the same dyno, etc. i guess i should have clarified: same car-same dyno. but as far as next time i go to MAC (same car-same dyno), i will be using the corrected numbers to see if i made improvement. i also see the point of comparing corrected numbers for cars from sea level.....it may not be perfect, but it's as close as we'll get.