[Z06] Question about dyno sheet
02-16-2017, 07:43 AM
#2
Melting Slicks
Member Since: Jun 2005
Location: Rochester NY
Posts: 2,734
Received 1,678 Likes
on
878 Posts
2018 C6 of Year Finalist
St. Jude Donor '10, '17
When the dyno operator indicates smoothing, basically they are adjusting how much detail is shown in the chart. It goes from 0-5. More smoothing will essentially "smooth" out the line by reducing or eliminating some of the little spikes that can show up. It makes it easier to read if the line is smoother. More detail (0) will usually show higher peak output as the spikes are not removed.
SAE is a correction factor. The output of any engine is fundamentally dependent on the air. As a dyno is simply a tuning tool, SAE corrections will take the raw numbers and then adjust them for atmospheric conditions such as temperature, pressure and humidity. This way there is a standard to make comparisons against from previous readings. So for example if I dyno my car one day, and then a month later add an exhaust and intake, the weather conditions likely will have changed. So both numbers are adjusted for these conditions so that there is a proper baseline to compare to that eliminates variations in weather (which effect engine output) and can show the true changes. When the adjustments are made, it becomes more of an apples to apples comparison. For SAE, they adjust to atmospheric pressure of 29.23, temp of 77 F and humidity of 0.
STD uses a different correction standard. I think it adjusts to a slightly lower temperature and higher pressure and therefore will give slightly higher numbers.
Ultimately, dynos are tools.
SAE is a correction factor. The output of any engine is fundamentally dependent on the air. As a dyno is simply a tuning tool, SAE corrections will take the raw numbers and then adjust them for atmospheric conditions such as temperature, pressure and humidity. This way there is a standard to make comparisons against from previous readings. So for example if I dyno my car one day, and then a month later add an exhaust and intake, the weather conditions likely will have changed. So both numbers are adjusted for these conditions so that there is a proper baseline to compare to that eliminates variations in weather (which effect engine output) and can show the true changes. When the adjustments are made, it becomes more of an apples to apples comparison. For SAE, they adjust to atmospheric pressure of 29.23, temp of 77 F and humidity of 0.
STD uses a different correction standard. I think it adjusts to a slightly lower temperature and higher pressure and therefore will give slightly higher numbers.
Ultimately, dynos are tools.
02-16-2017, 08:40 AM
#3
Team Owner
CF=Correction Factor
Mordeth got the rest spot on.
So basically SAE is theoretically what your car would make on a 29.23 baro, 77F day at sealevel with 0 humidity not what the car actually made.
Mordeth got the rest spot on.
So basically SAE is theoretically what your car would make on a 29.23 baro, 77F day at sealevel with 0 humidity not what the car actually made.
02-16-2017, 12:53 PM
#5
Team Owner
You can figure out your actual power by reversing the CF. So if it said 1.05 that means it added 5% to your actual number. A CF of 1.0 would mean actual=corrected.
02-16-2017, 03:28 PM
#7
Team Owner
The CF part should be on the bottom by the numbers/run conditions unless they clipped that off.