how about a hyd pump? dont know how ya would drive it ?but you could very the flow to make it add back pressure to the dino ? they spin pretty free with no load and as you restrick the flow it would turn harder?ill follow the thred so if ya need a pump i think i might be able to help .. i use dextron 3 in my pumps mike
If the dyno that you have (inertia dyno) is a drum on an axle and the drum is turned by the motorcycle wheel then you could couple the hydraulic pump up to the drum's axle with a drive shaft and put load on by restricting flow from the pump or other use of the flow.
You would likely want a big gear pump and open centered valving so that there will always be flow through the system. You will have to provide for cooling the oil as restriction and loading will create heat that you need to get rid of.
Another method would be to drive a generator and then load the generator electrically. i worked at a place and we built up gene sets and we had an electrical load bank that we used. The load banks that I have seen are plates and liquid. You lower the plates into the liquid to increase load.
Another method that I have seen is a variation on the hydraulic - it uses water as a hydraulic fluid instead of oil. Same basic drive arrangement, drive a pump and restrict the flow.
You could use a truck diff and drive it and impose load through the brakes.
I don't know how you would calculate the load to be able to calculate the HP of the driver for any of these methods but standard measures (GPM, PSI, Volts, Amps etc.) should apply.
As far as cooling the engine there are usually lots of squirrel cage blowers around. I got a grain dryer at an auction yesterday for $20 ....... has a 2hp 110/230 3450 RPM motor on it that I need for something else.
I don't plan on using the load to calculate Hp or torque, It has the means to do that on it's own. I have the Dynojet inertia Dyno, and the software. It's old, but it works.
I only want the ability to load the dyno to make tuning my EFI bike easier, and cheaper. Dyno time isn't cheap.
I have wideband O2 on the bike so really, all I need is a way to put a load on the bike for extended periods so I can tune it.
I'll check for max power using the standard inertia Dyno setup.
Hydraulic pumps are a good option, but I'd have to find a way to keep the fluid cool.
1. lots of fluid
2. means of cooling a smaller amount of fluid. (radiator, Shell and tube)
Water would be good but finding a pump that size??
Disk brakes get hot fast, and take a long time to cool. Though they are a cheap option.
Generator is a good Idea but expensive. Unless there is a way to build something like using a large three phase motor.
I have seen generators used to power water heating elements to apply load.
??
