I think I am generating a lot of power. Can you help me check please?

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Edu Costa
Posts: 5
Joined: Thu Dec 31, 2020 8:10 am

I think I am generating a lot of power. Can you help me check please?

Post by Edu Costa »

I did a workout on the paved road with my Gravel and another with the Mountain Bike.
For some time now I have found the power values overestimated, including generating results of almost 10% more in FTP.
Can you please help me check if the calibration is correct?
Stressing, on each bike I use pairs of different sensors.
Attachments
Gravel highway - iBike_12_29_2020_0627_32_km.ibr
(192.47 KiB) Downloaded 6 times
GRAVEL interval climbing training - iBike_12_30_2020_0610_33_km.ibr
(293.96 KiB) Downloaded 6 times
MTB - iBike_12_31_2020_0609_40_km.ibr
(512.87 KiB) Downloaded 5 times
Velocomp
Velocomp CEO
Posts: 7027
Joined: Fri Jan 11, 2008 8:43 am

Re: I think I am generating a lot of power. Can you help me check please?

Post by Velocomp »

Your Crr (rolling resistance) somehow was boosted to an unreasonably high number of 0.013. That would be like doing all your riding in soft sand...

I adjusted the Crr number down, to 0.007. This drops about 50W off of your rolling resistance component.

It looks like you are using the same sensors and profile on both your gravel and MTB. Is this correct?
Attachments
MTB Corr.ibp
(514 Bytes) Downloaded 6 times
Gravel.ibp
(407 Bytes) Downloaded 7 times
Gravel highway _corr - iBike_12_29_2020_0627_32_km.ibr
(205.7 KiB) Downloaded 6 times
MTB_corr - iBike_12_31_2020_0609_40_km.ibr
(510.96 KiB) Downloaded 6 times
GRAVEL_corr_ interval climbing training - iBike_12_30_2020_0610_33_km.ibr
(312.09 KiB) Downloaded 7 times
John Hamann
Edu Costa
Posts: 5
Joined: Thu Dec 31, 2020 8:10 am

Re: I think I am generating a lot of power. Can you help me check please?

Post by Edu Costa »

Hi,
I use separate sensors. A pair of sensors (Speed and Cadence) for each bike.

I did a PP reset and tomorrow in a new training I try to calibrate again. I will also install Isaac again, I don't know if that is it, but I need to try something.
Everything works normally on a bicycle. But when I try to use MTB (with different sensors) everything gets lost, very frustrated with that. Maybe I am doing something wrong in the construction of the profiles in PP.

I calibrated today, and the numbers were so absurd again.
Velocomp
Velocomp CEO
Posts: 7027
Joined: Fri Jan 11, 2008 8:43 am

Re: I think I am generating a lot of power. Can you help me check please?

Post by Velocomp »

For the ride files you provided (Gravel and MTB), the wireless IDs in their two profiles were IDENTICAL.

Isaac has nothing to do with high watts you see while riding.

Please do the following:

1) do a short ride with your MTB

2) do a short ride with your gravel bike

Post both ride files.
John Hamann
Edu Costa
Posts: 5
Joined: Thu Dec 31, 2020 8:10 am

Re: I think I am generating a lot of power. Can you help me check please?

Post by Edu Costa »

Hi,
I use different sensors for each bike, including the Garmin I renamed them for easy identification. However, I think I am doing something wrong when creating the profiles, perhaps overwriting and giving this error.

I am sending two new workouts for each of them, MTB and GRAVEL. I want to thank you for your support!
Attachments
GRAVEL - iBike_01_08_2021_0619_64_km.ibr
(354.93 KiB) Downloaded 6 times
MTB - iBike_01_10_2021_1650_21_km.ibr
(211.81 KiB) Downloaded 8 times
Velocomp
Velocomp CEO
Posts: 7027
Joined: Fri Jan 11, 2008 8:43 am

Re: I think I am generating a lot of power. Can you help me check please?

Post by Velocomp »

Your MTB file looks fine.

Your Gravel file has two problems: 1) Crr is way too high; 2) wind calibration is incorrect.

I have attached corrected Gravel file and profile.

The HUGE difference between power in these two files is that you are traveling about 13 mph in the MTB file (avg watts 145) versus 20 mph in the Gravel file (avg watts 242). I can't tell if these bike speeds are correct.
Attachments
GRAVEL - Corr_01_08_2021_0619_64_km.ibr
(454.79 KiB) Downloaded 5 times
Gravel_Corr.ibp
(568 Bytes) Downloaded 4 times
John Hamann
Edu Costa
Posts: 5
Joined: Thu Dec 31, 2020 8:10 am

Re: I think I am generating a lot of power. Can you help me check please?

Post by Edu Costa »

Hello John, thanks again for your attention.

I must be doing something wrong when sending the corrected profile to my PP. Isaac is giving me these screens below.
If I happen to have a tutorial where I can learn how to update the profile, I am grateful.
Attachments
1.jpg
1.jpg (108.61 KiB) Viewed 271 times
2.jpg
2.jpg (112.77 KiB) Viewed 271 times
Velocomp
Velocomp CEO
Posts: 7027
Joined: Fri Jan 11, 2008 8:43 am

Re: I think I am generating a lot of power. Can you help me check please?

Post by Velocomp »

This screen means that your profile for this bike is too far away from its original setting.

I've artificially altered your profile so that you should be able to load it. After loading it do a short ride; your PP will be way out of calibration for the first few minutes, but it should correct itself after a bit. Download and post the ride.

If this doesn't work, then please do a new calibration ride with your gravel bike, then post that ride afterwards to me for any required correction.
Attachments
Gravel_Corr2.ibp
(569 Bytes) Downloaded 4 times
John Hamann
Edu Costa
Posts: 5
Joined: Thu Dec 31, 2020 8:10 am

Re: I think I am generating a lot of power. Can you help me check please?

Post by Edu Costa »

Hello, I'm sending the short training with GRAVEL as you asked me. And another race with MTB.

I think GRAVEL's profile was very good after your help, but if you can check it out, I'm grateful.
Attachments
Gravel - iBike_01_27_2021_0612_37_km.ibr
(222.57 KiB) Downloaded 1 time
MTB RACE - iBike_01_24_2021_0806_39_km.ibr
(337.87 KiB) Downloaded 1 time
Velocomp
Velocomp CEO
Posts: 7027
Joined: Fri Jan 11, 2008 8:43 am

Re: I think I am generating a lot of power. Can you help me check please?

Post by Velocomp »

Gravel is excellent.

Assuming your MTB race was with a lot of drafting, it is perfect too.
John Hamann
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