Hi

I am just setting up an engine dyno cell using a Stuska absorber and planning to use yourdyno for load control and data acquisition.

I contacted Stuska and sent them a pic of the absorber enquiring about the hp rating, they came back with a range of 650 to 850 depending on the year of manufacture. I have acquired a couple of pumps that should supply enough water to run the brake at around 750 hp if the brake is capable of it.

The first issue I have is load cell size, I tune a variety of engines from around 50 bhp upwards but would like to be able to use the dyno to its max potential if the opportunity arises.

The torque arm on the dyno has 2 positions for the load cell to mount one at around 160 mm c to c and the other at around 325mm c to c. I used the calculator to work out the load cell size which comes out at about 300kg on the longer mounting position.

my main concern is that when I am tuning the smaller engines that the resolution of a large load cell will not be good enough for the small engines, I wondered if anybody has experience in this and if there was any merit in moving the load cell from position to position depending on the expected power of the engine?

The other question is regarding a load control valve, I want to use the stepper motor output to control the load, is there a suitable valve commercially available at a sensible cost ?

I would be grateful for any advice on these issues

regards

Steve