info dynamometer software GSF DYNO, SIP HORSEPOWER DYNO

[hannozero]

Hi guys,
i wonder if anybody tried the audio based dyno softwares as GSF DYNO, SIP HORSEPOWER DYNO, MICRO DYNO ETC... on automatic transmission.
i know that they are not designed to work with automatic transmission as cvt,
but i also read that this will be possible locking the variator to a certain gear.

In this case how to lock the variator? i know that is possible to put a ring on the bushing but should i lock it at the maximnum gear or with the belt somewhere in the middle?(just to know if to put a ring behind the variator plate or between the variator and the half pulley). how will react the software curve till the  variator will arrive in locked position?

[FrankenMech]

Lock the rear wheel. The variator may stick in low gear though??? The belt may melt. You can't start the engine with the variator locked.

[hannozero]

Dec 5, 2019 13:03:46 GMT -5 FrankenMech said:

Lock the rear wheel. The variator may stick in low gear though??? The belt may melt. You can't start the engine with the variator locked.

hi, i know that when cvt scooters are tested on dynometer the variator is locked, for example if you give a look at the link:

www.pedparts.co.uk/blog/tecnigas-exhaust

it is written:
.....Additionally the Piaggio Zip variator system was replaced with a fixed gear locked drive system. This is necessary to get meaningful power graphs on variator driven scooters as it prevents the variator from dynamically adjusting the gearing which would otherwise make it impossible to get valid comparison data.

also indicated into the graphic below


www.pedparts.co.uk/c/asset/tecnigas/tecnigas-standard-50.png

so i would like to learn the correct method to achieve this result

[dexameth]

You'll have to find a way to get a fixed pulley to attach to the crank, and the same with the clutch. 1-1 ratio, direct drive.

[hannozero]

Dec 6, 2019 16:22:49 GMT -5 dexameth said:

You'll have to find a way to get a fixed pulley to attach to the crank, and the same with the clutch. 1-1 ratio, direct drive.

you are thinking to have the same pulley dimension on the front and on the back? on that case i should find pulleys more or less the half diametar of the variator to be able to start?

[dexameth]

Sounds abut right, your guess on size. And yes. Same diameter cogs front and rear.

[FrankenMech]

A chain drive with sprockets would probably work better since the belt pulley length is non adjustable.