I recently got a P2M NGeco and after a half dozen rides I'm finding it's reading lower than other power meters I've used. Two of those rides have been on my trainer (a Hammer) and the P2M was 15-16 W lower than the Hammer. Outdoors it also seems low but that's much more qualitative since its based on similar efforts on routes I know well and ride often.
As long as it's consistent then I guess I don't care that it's lower, though I am surprised by a 15 W difference given how well the NGeco tracks with other power meters via DC Rainmaker comparisons. So my questions are:
[1] Has anyone done the "Hill test" that P2M mentions for checking the calibration of their power meter? And if so, how'd it go?
[2] Anyone done a static torque test, and if so any tips?
[3] If you ride outside with one power meter and inside on a "smart" trainer, and they give pretty different results, how do you recommend accounting for the difference when keeping track of TSS in Training Peaks (switch your FTP back and forth?)?
I'm generally curious to see if anyone's had any similar experience with their NG or NGeco.
Also, to try and anticipate some questions/comments:
Why am I not using PowerMatch when on the trainer? Because I have my old tri bike set up with my same pad x/y parked on the Hammer for indoor training. I only put my current tri bike on the trainer to compare the Hammer to the P2M.
You're speculating based on only a couple rides? True, this could be much ado about nothing. I plan to race next Sunday on a course I've done many times and have lots of data to compare to. I also have a couple hill repeat workouts I've done many times (steady, steep climbs so wind, position, etc. shouldn't complicate things) that I hope to do with the P2M soon.
You switched from Stages to P2M and you expect the two to be the same, what are you an idiot? Perhaps, but I'll be damned if the Stages wasn't pretty much spot on with the Hammer and my PowerBeam before that, and power/effort indoors correlated really well with power/effort outdoors.
As long as it's consistent then I guess I don't care that it's lower, though I am surprised by a 15 W difference given how well the NGeco tracks with other power meters via DC Rainmaker comparisons. So my questions are:
[1] Has anyone done the "Hill test" that P2M mentions for checking the calibration of their power meter? And if so, how'd it go?
[2] Anyone done a static torque test, and if so any tips?
[3] If you ride outside with one power meter and inside on a "smart" trainer, and they give pretty different results, how do you recommend accounting for the difference when keeping track of TSS in Training Peaks (switch your FTP back and forth?)?
I'm generally curious to see if anyone's had any similar experience with their NG or NGeco.
Also, to try and anticipate some questions/comments:
Why am I not using PowerMatch when on the trainer? Because I have my old tri bike set up with my same pad x/y parked on the Hammer for indoor training. I only put my current tri bike on the trainer to compare the Hammer to the P2M.
You're speculating based on only a couple rides? True, this could be much ado about nothing. I plan to race next Sunday on a course I've done many times and have lots of data to compare to. I also have a couple hill repeat workouts I've done many times (steady, steep climbs so wind, position, etc. shouldn't complicate things) that I hope to do with the P2M soon.
You switched from Stages to P2M and you expect the two to be the same, what are you an idiot? Perhaps, but I'll be damned if the Stages wasn't pretty much spot on with the Hammer and my PowerBeam before that, and power/effort indoors correlated really well with power/effort outdoors.