Alekshop: 2011 135i Dyno Results - Base Line

[Alekshop]

The weather was good so we decided to do a few base line runs.

All the data was captured by a fellow forum member Robert (PG). For each dyno run, he collected the actual weather data inside the dyno shop.

The purpose is to compare the dyno weather data (used for SAE horsepower correction) with the values read by the portable weather station. There are two SAE horsepower correction standards. Dynojet uses the current (2004+) standard. "SAE-Adapted" from Dynapack is the older J607 (pre-2004) standard. The calculations in both formulas are the same, but the reference temperature is now 77 degrees (instead of 60), and the reference barometric pressure is now 29.92 (instead of 29.235). That's what accounts for the differences win WHP(sae) and WHP(std).

Equipment:

• Portable weather station Kestral 4500.
• DynoJet

The legend below has the following meaning:

• Temp(F) = Temperature (Farenheit)
• RelH = Relative Humidity
• Pressure(Hg) = Barometric Pressure
• DA(ft) = Density Altitude
• WHP(unc) = Uncorrected wheel horsepower
• WTQ(unc) = Uncorrected wheel torque
• WHP(sae) = SAE corrected wheel horsepower (SAE-J1349 2004+)
• WTQ(sae) = Dynojet corrected wheel torque (SAE-J1349 2004+)
• WHP(j607) = SAE-Adapted wheel horsepower (SAE-J607 -2004)
• WTQ(j607) = SAE-Adapted wheel torque (SAE-J607 -2004)

Info:

• Alekshop
• 2011 135i - 2000 miles
• DCT
• Bone Stock
• Shell 91 Octane

• Temperature - 57-57.5F
• RelH - 58.60-59.10
• Press(Hg) - 30.24
• DA(ft) - (-380) (-347) (-337)

Fun Part









Thank you,
Aleks.

[shockin330i]

Nice graphs. what gear was this done in?

[Alekshop]

Originally Posted by shockin330i

Nice graphs. what gear was this done in?

Pull were done in 4th gear ... It looks like it is the best choice for DCT car.

[shockin330i]

I think you would have gotten a higher tq reading if u had started recording at 2k rpms.