Disassemble rotor(flightwheel).... 

FOUND!!!

1 telma cc250

1 telma cc300

The rotor weight is identical, gap is perfect, only bearing the telma cc300 present light noise...

Next step disassembly entire brake, check bearings, 

Is correct machining the surface of the flywheel??? Or do no touch the surface?? I think work the surface on the my lathe machine... is a bad idea??

Hello

Try truck breakers in Spain or France .

I found 2 very nice Telma cc200 at Martin Seb Casse Poids Lourds

In the South West France.

Seb is a very good Guy

Best regards

Hello

For hub dyno, the two brakes must be the same.

Think about inertia. An inequal load can kill the differential when you release braking at full speed.

One of the best choice for hub dyno are Telma CC200. 200 daN of braking torque these brakes can run at 4000 RPM.

Old brakes but safe and reliable.

Best regards

Hi and welcome!

You need to use brakes with axels, in other words you cannot use the focal models without quite some mechanical work. 

Your max braking capacity will be 2 x 1000Nm at the brakes, and divide the gear ratio to get the braking capacity at the engine (you did that correctly). However, note the torque vs RPM curve. It is only 1000Nm at a specific RPM, and tapers off both above and below that. Another point to remember is that when the brakes are hot they are quite a lot weaker. This is normally mostly a problem if you are running long steady state tests, not for a quick power sweep through the RPM range. But you anyway need margin! Go for double the capacity you need if you can. There will be some losses in the drive train, which is good in that respect, maybe 10% or so. 

The brakes do not need to be the same, the software controls the two brakes completely independently. But of course you will be limited by the smallest brake.

Good luck!

Thanks a lot for the answer. but 
as I explained before I would 
like to build dyno hubs, and from 
what I have noticed the dyno hub 
runs very slowly, because it is 
connected directly to the car 
without the reduction of a roller, 
therefore it takes a lot of brake
 nm ... attached I attach the 
datasheet of the frenelsa in 
question ... Thanks

Had to do two links 

Hi Giakx14xe and Welcome to the forum ,

What speed is the Frenelsa F16-100 rated at ? 

What gear do you plan to do the testing in ?

Here are a  few xls spreadsheets you can play around with numbers which may answer some of you questions?

I don't know the Frenelsa F16-100 electric brake specification but I'm only basing it on the fact that its is smaller than a Frenelsa F16-120EL Maximum rpm = 6300 Maximum Nm = 1176 and larger than a Frenelsa F16-65EL Maximum rpm = 7000 Maximum Nm = 637 , so speed shouldn't be a issue.