Dyno test info

[Bigchief632]

14% correction seems like a lot for that weather and altitude.
Tuesday it was in the mid 80's very high humidity and baro in the toilet here, 1200 ish elevation, corrected 7%

[Stan Weiss]

14% correction seems like a lot for that weather and altitude.
Tuesday it was in the mid 80's very high humidity and baro in the toilet here, 1200 ish elevation, corrected 7%

If you are using a Super Flow dyno. You do understand how ME% is used in correcting HP and not just weather data?

Stan

[Bigchief632]

14% correction seems like a lot for that weather and altitude.
Tuesday it was in the mid 80's very high humidity and baro in the toilet here, 1200 ish elevation, corrected 7%

If you are using a Super Flow dyno. You do understand how ME% is used in correcting HP and not just weather data?

Stan

[David Redszus]

95 degree,29.23 baro, 80% relative hum.= c/f of 1.07
95, 23.6 , 80. = c/f of 1.393
Sae j1349
I'm no expert on this stuff but there are some numbers for you.

Correction factors will vary depending upon which standards are used for comparison.

Given cell conditions: 95F, 29.23 baro, 80% RH

Corrected to STP.......1.155 (no humidity)
Corrected to J1349....1.050

Corrected to STP.......1.165 (80% humidity)
Corrected to J1349....1.067

The difference in correction factor for pressure standards (STP v J1349) is 2.3%
The difference in correction for temperature standards (STP vs J1349) is 8.39%

Both standards assume dry air (0 RH); but if moist air is present at 50 RH
Corrected to STP.......0.58%
Corrected to J1349....1.52%

The difference in correction standard effect for moisture and altitude is very small,
but for temperature it is a major error factor.

Correctly measured inlet air temperature is critical for accurate correction calcs.

[Stan Weiss]

14% correction seems like a lot for that weather and altitude.
Tuesday it was in the mid 80's very high humidity and baro in the toilet here, 1200 ish elevation, corrected 7%

If you are using a Super Flow dyno. You do understand how ME% is used in correcting HP and not just weather data?

Stan

Note I don't own a dyno. Do You own a dyno? If so is it a Super Flow Dyno?

If so open a SFD file where it shows the STPCor Factor as being great than 1.07. In most cases this will be a constant for the full pull. Now divide Cor Hp by UnCor HP for max Hp and how far off is this number from the STPCor Factor. On the sheet I am looking at I calculate 1.10 and Super Flow says 1.075. The higher the STPCor Factor the more the 2 numbers will vary.

Stan

[Bigchief632]

If you are using a Super Flow dyno. You do understand how ME% is used in correcting HP and not just weather data?

Stan

Note I don't own a dyno. Do You own a dyno? If so is it a Super Flow Dyno?

If so open a SFD file where it shows the STPCor Factor as being great than 1.07. In most cases this will be a constant for the full pull. Now divide Cor Hp by UnCor HP for max Hp and how far off is this number from the STPCor Factor. On the sheet I am looking at I calculate 1.10 and Super Flow says 1.075. The higher the STPCor Factor the more the 2 numbers will vary.

Stan

[Stan Weiss]

Note I don't own a dyno. Do You own a dyno? If so is it a Super Flow Dyno?

If so open a SFD file where it shows the STPCor Factor as being great than 1.07. In most cases this will be a constant for the full pull. Now divide Cor Hp by UnCor HP for max Hp and how far off is this number from the STPCor Factor. On the sheet I am looking at I calculate 1.10 and Super Flow says 1.075. The higher the STPCor Factor the more the 2 numbers will vary.

Stan

Clearly if you had any idea how the software works you would have no need to be posting these emojis.

Stan

[vortecpro]

Last Thursday we dyno tested at Centex dyno, 800 + elevation, in the 90s temp we had a 1.07 correction, Power Mark dyno. Since not one dyno operator over years on here would not enter the typical baro I tested on in Colorado (23.60) I asked Centex to enter my Colorado baro (23.60) in his dyno that was correcting @ 29.15 baro good for that area, THE RESULTS 1.32 correction factor..............................................