In order to set up a drag car or bike for peak performance, using loads of boost / nitrous or other modifications, the best thing to have is a suitable inertial chassis dynamometer. It needs to have big diameter clean drums, with a very good grip. Dual rollers are not appropriate in this case, so dont use them!
The dynamometer should have powerful fans and airflow and an experienced operator.
A braked system is simply unsuitable for an application like this. The dyno itself, along with plug readings, and experience would be the best way to set the car / bike up. Gas analyzers are useless in these situations.
If your aim is to set up a stock or mildly tuned cars / bikes fuel injection system, or set up a carburetor systems jetting or ignition properly, you should find a decent braked system, maybe with twin rollers and with a good gas analyzer.
This is the best way to set up this kind of vehicles.
You should use this kind of dyno tools if you are working on stock or mildly tuned car for fault finding, or for a health check.
To obtain the accurate power curve picture of a vehicle, you should put on an inertial dynamometer.
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