3/26 Dyno Day Results
03-28-2005, 09:55 PM
#21
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Steve at Powertrain emailed me all the files for the G35s and 350zs. Some of the files were from previous dyno days. Send me an email at ajlin_ek@yahoo.com if you want the files.
Can someone explain why when I'm looking at a specific run in WinPEP, the plot looks different depending on whether the X-axis is speed or RPM. My first two dyno runs don't look like the paper printout that I got. When the X-axis is RPM, the curve stops abruptly at 6100 RPM. When the X-axis is MPH, the plot continues until the rev limiter is hit. Again, this is for a given run, not separate runs.
Can someone explain why when I'm looking at a specific run in WinPEP, the plot looks different depending on whether the X-axis is speed or RPM. My first two dyno runs don't look like the paper printout that I got. When the X-axis is RPM, the curve stops abruptly at 6100 RPM. When the X-axis is MPH, the plot continues until the rev limiter is hit. Again, this is for a given run, not separate runs.
03-28-2005, 10:12 PM
#22
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Originally Posted by E K
Steve at Powertrain emailed me all the files for the G35s and 350zs. Some of the files were from previous dyno days. Send me an email at ajlin_ek@yahoo.com if you want the files.
n1cK!
03-28-2005, 10:28 PM
#23
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Originally Posted by n1cK!
i jus' didn't really have time to stick around and mingle. god, i hope ya'll don't think i'm the stuck up dude of the group 
but, there's always tomorrow!
n1cK!
ps-USB key drive, eh? i wonder if that's how all the dyno shops around here do it
but, there's always tomorrow!n1cK!
ps-USB key drive, eh? i wonder if that's how all the dyno shops around here do it
I don't know about other dyno shops. I guess it all depends on how their computers are configured. I don't think Steve's had a floppy drive. All he did was copy files over to the drive. Just go pick up a 32MB one for under $20.
03-28-2005, 10:30 PM
#24
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Originally Posted by n1cK!
what program would i need to read these?
03-28-2005, 10:37 PM
#25
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Originally Posted by E K
Steve at Powertrain emailed me all the files for the G35s and 350zs. Some of the files were from previous dyno days. Send me an email at ajlin_ek@yahoo.com if you want the files.
Can someone explain why when I'm looking at a specific run in WinPEP, the plot looks different depending on whether the X-axis is speed or RPM. My first two dyno runs don't look like the paper printout that I got. When the X-axis is RPM, the curve stops abruptly at 6100 RPM. When the X-axis is MPH, the plot continues until the rev limiter is hit. Again, this is for a given run, not separate runs.
Can someone explain why when I'm looking at a specific run in WinPEP, the plot looks different depending on whether the X-axis is speed or RPM. My first two dyno runs don't look like the paper printout that I got. When the X-axis is RPM, the curve stops abruptly at 6100 RPM. When the X-axis is MPH, the plot continues until the rev limiter is hit. Again, this is for a given run, not separate runs.
I was also wondering the same thing. I can't seem to reproduce my printout with WinPEP. The numbers will also change depending on the smoothing. I get higher peak numbers with the 0 setting, but the lines aren't as smooth. The program does some sort of averaging.
03-29-2005, 12:03 AM
#29
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dyno results
well, here's my dyno graph. i can't seem to export numbers, or pull up any a/f data. is that because i have a demo version? i applied the upgrade to it, but it didn't do anything. oh well.
n1cK!
n1cK!
Last edited by n1cK!; 03-29-2005 at 12:10 AM. Reason: added power, torque, and a/f graphs w/RPM as x-axis
03-29-2005, 03:57 PM
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Originally Posted by omen68x
Albert, check your PM.
I was also wondering the same thing. I can't seem to reproduce my printout with WinPEP. The numbers will also change depending on the smoothing. I get higher peak numbers with the 0 setting, but the lines aren't as smooth. The program does some sort of averaging.
I was also wondering the same thing. I can't seem to reproduce my printout with WinPEP. The numbers will also change depending on the smoothing. I get higher peak numbers with the 0 setting, but the lines aren't as smooth. The program does some sort of averaging.
Anyway, I think I figured out why my plot for dynorun2 looks different when the X-axis is speed vs RPM.
When the HP is plotted against speed and with a second graph showing RPM at the bottom, you can see that just after 5.97K RPM, the reading is off on the RPM. The torque jumped during this time, so maybe the tires slipped. But I get reliable RPM readings later, around 6300-6600 RPM. I didn't plot the torque with this one, because the picture was getting too complex.
But once the RPM reading is off, the plot of HP vs RPM stops. I can't get any data to show up after that point.
Notice that my max HP is reduced in the second plot, because it's only going up to 5.97K RPM, even though the exact same run really went up to 6600 RPM.
These plots still look different from the printout, so maybe they were using a different version of the software. My max HP is at 6500 here, on the printout it's between 6600 and 6700. Close enough.
here, this should work now.
03-29-2005, 07:04 PM
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my winpep7 charts look almost exactly like the dyno chart, but yeah without smoothing, i have 269.12 and 253.10 torque woohoo! These are actuals, not SAE.
Last edited by islandsnow; 03-29-2005 at 07:16 PM.
03-29-2005, 08:58 PM
#35
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Originally Posted by islandsnow
hey nick,
how did you get that crazy peak of torque up to 253 at 5700rpm???
how did you get that crazy peak of torque up to 253 at 5700rpm???
n1cK!
03-30-2005, 12:16 AM
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I have a question, what's the difference between a dynojet and mustangdyno? I know PowerTrain Dynamics was using a dynojet, but I read people refer it as a mustangdyno......... I'm confused, I need some clarification........ 
03-30-2005, 12:22 AM
#39
Originally Posted by FLZ_Boy
I have a question, what's the difference between a dynojet and mustangdyno? I know PowerTrain Dynamics was using a dynojet, but I read people refer it as a mustangdyno......... I'm confused, I need some clarification........
03-30-2005, 06:07 AM
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The mustang is another brand of dyno, they make both 2 and 4 wheel. The dynojet is another brand. They are different. People say Mustangs give lower numbers but are more realistic numbers because the load they put on the wheels. The mustang guys say the dynojet spins too freely, but good for wot tuning, while the mustang is good for tuning the whole band. I just read this stuff so don't quote me on it.