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SCOOTERLABS DYNO PHASE 3 - dynojet hardware and software


They scooterlabs dyno has been operating using the Dynertia software/sensor package. Used professionally for testing motors and demonstrating horsepower vs km/h improvements achieved by modifications, I would rate this as a success.

Some scooters (mainly Lambretta) would generate too much interferance and the data would be lost or corrupted. This was generally resolved by using resistor spark plugs and/or caps.

I have made the decision to upgrade to the latest Dynojet hardware/software. This decision comes after observing the great benefits of having the dyno in operation. I have no doubt that it will be a worthwile investment to align my results and graphs with the industry standard equipment used all over the world.

The hardware stack on order should include rpm (primary wire pickup) weather, roller rpm and the facility to add the rather expensive air-fuel sensor in the future.

While I am happy with the Dynertia system for power vs road speed, I found I had difficulty setting up the rpm module. Because I am working on only two kinds of motor that I know intimately (ooh vicar) I have not needed engine rpm for my analysis, as I have a fair idea of rev range from road speed and sound. My plan to tune CVT scooters as well as provide dyno runs for other bikes will mean that engine RPM will be critical, thus the upgrade.


- high cost of Dynojet products in Australia.

- My current dynertia setup includes a wideband air/fuel sensor, which Dynertia module processes to appear on the graph. This appears to be effective and consistent. Dynojet do not allow any other sensor module to be plugged in, meaning another 2500 instead of the 350 for the current one.

- changing Dyno software after doing many runs is something I wanted to avoid as all past runs add up to create a wealth of information, as well as a way of referencing clients past levels of performance and how weart and tear affect power levels. That said, if there is a dramatic difference in results then it is either good that I changed, OR good that I had the previous software to enlighten me to the inaccuracy or setup error.


- Industry standard results

- hopefully expert technical support

- due to the outboard processor and general expensiveness, I assume the effects of engine noise will be reduced.

- reliability, software stability and branding are all major factors in running a commercial Motorcycle Dynomometer.



- make dyno HP runs on at least three different scooter immediately prior to installing the Dynojet system. Once the system is installed I will run these again and compare results. What happens next will depend on the discrepancies. If there is an issue I will attempt to operate both systems simultaneously to narrow down any calibration issues.

- build a room around the unit.

- contact other dyno users running air-fuel sensors on two stroke scooters and compare 'sniffers' and sensor positioning.

- My air-fuel sensor will still be operable along with the dynojet system, but results will not be graphed. They will be displayed in real time during runs up until I install the Dynojet air-fuel module.

- get Paul to arrange my yappng into some semblance of order