The SAE corrected numbers are 157 hp and 175 lb-ft of torque (works out to ~180 hp and ~200 lb-ft at the flywheel with 12.5% loss) ... the plotted ones are standard correction.
Baseline dyno(first run in blue print was a freak run because the car wasn't set straight and I didn't get to finish the run. The one in red was the good baseline run):
Upsolute dyno:
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Garrett dyno:
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Upsolute vs. Garrett--HP and Torque (Upsolute is runs "Mark B. 003" and "004," Garrett is runs "Mark B. 005" and "006"):
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Upsolute and Garrett air/fuel ratio (Upsolute is runs "Mark B. 003" and "004," Garrett is runs "Mark B. 005" and "006"):
quote:[HR][/HR]Why is there such a difference between dynos? I know there are some chipped and not chipped but from 144 to 157 is a big range for stock.
[HR][/HR]
I have seen some other Mk IV stock VR6 dynos on the VR forum a while back that were in the 156- 161 range. Otherwise, temp/humidity/altitude/fuel octane/wheel size and weight etc could affect the numbers to great extents.
1st off SilverBora has posted some dyno plots I showed him. I forgot to ask him NOT to post in the Vortex since they would not pass scrutiny here. Viper run was done in a VR6 Jetta different than the one doing the stock and UP runs. I have dynoed my car prior to the Viper (the numbers were very close to NeoJetta SAE Upsolute run) but I dont have the data file to make a plot.
Stock and UP data were taken by Neojetta in his car. Viper run is my car. I used SAE correction and smoothing factor '5' for the 1st plot he posted, and then smoothing factor '1' (more jagged).
Knockwurst dyno is also SAE corrected, but he has no stock run.
PAL and NeoJetta plots are STD corrected. I have observed that STD correction numbers are higher than SAE corrected ones. NeoJetta stock STD run is 148.2HP, same SAE run is 146.01HP.
PAL numbers are way too high. I would redyno at a different place just to make sure, and ask for SAE corrected numbers.
I can redo the plots posted by SilverBora using STD correction.
quote:[HR][/HR]1st off SilverBora has posted some dyno plots I showed him. I forgot to ask him NOT to post in the Vortex since they would not pass scrutiny here. Viper run was done in a VR6 Jetta different than the one doing the stock and UP runs. I have dynoed my car prior to the Viper (the numbers were very close to NeoJetta SAE Upsolute run) but I dont have the data file to make a plot.
Stock and UP data were taken by Neojetta in his car. Viper run is my car. I used SAE correction and smoothing factor '5' for the 1st plot he posted, and then smoothing factor '1' (more jagged).
Knockwurst dyno is also SAE corrected, but he has no stock run.
PAL and NeoJetta plots are STD corrected. I have observed that STD correction numbers are higher than SAE corrected ones. NeoJetta stock STD run is 148.2HP, same SAE run is 146.01HP.
PAL numbers are way too high. I would redyno at a different place just to make sure, and ask for SAE corrected numbers.
I can redo the plots posted by SilverBora using STD correction.[HR][/HR]
Pal does have the highest numbers I've seen on a stock VR.
Hey Rock, can you explain the difference between the STD and SAE correction factors? Thx. http://****************.com/smile/emthup.gif
I have no CLUE!
I assume the following, SAE(*) determines that HP figures should be given at certain conditions. When you dyno the equipment has sensors that collect data requiered to do the SAE correction. The dynorun viewer program corrects the numbers so the external conditions match those requiered by SAE.
Same should happen with STD correction. I think STD stands for standard. Remember in high school when you took physics and the problems read "Given standard conditions find X, Y Z ..." Those same standard conditions are what I pressume the STD correction tries to compensate for.
(*) Society of Automotive Engineers
I didnt do a stock dyno, but another VR6 did at the same place where Jim had me dyno the stock paper filter and the K&N. He had done 148whp. Your 157HP is impressive, was it SAE corrected, was it taken at the same place where you dynoed after the chip and exhaust, and later with the Viper?
quote:[HR][/HR]I have no CLUE!
I assume the following, SAE(*) determines that HP figures should be given at certain conditions. When you dyno the equipment has sensors that collect data requiered to do the SAE correction. The dynorun viewer program corrects the numbers so the external conditions match those requiered by SAE.
Same should happen with STD correction. I think STD stands for standard. Remember in high school when you took physics and the problems read "Given standard conditions find X, Y Z ..." Those same standard conditions are what I pressume the STD correction tries to compensate for.
(*) Society of Automotive Engineers[HR][/HR]
The SAE correction factor is one that is used in most automotive applications. It corrects the numbers to a certain elevation (I forget what it is), 298K (24.52°C or ~76°F), and 1.0013 bar (14.52 psi) for ambient temperature and pressure. This allows numbers to be compared. The STD correction most likely uses different ambient conditions and elevation, it's usually considered to be sea level elevation, 288K (15°C or 60°F) and 0.99 bar (14.36 psi). SAE is the more realistic number to look at!
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