These are dynos that directly connect to the engine’s crankshaft to measure engine power without transmission or some parasitic losses (alternators, PAS pump etc). They are used in OEM development to create the initial calibration on new powertrain units.
This is only practical for final-mapping where the following systems are what will be mounted on the vehicle:
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- intake system (air box and associated air charge piping)
- intercooler system
- Exhaust System
- Cooling system
- Fuel system
- Electrical power distribution system and earth bond resistance
This is why it is a pointless expense in freelance mapping since these systems will be totally different on an engine dyno compared to the equipment that will be used in the chassis of the car
This is where the whole car is attached to the machine to measure it
There are two main types: Hub Dynos and Roller-Dynos
Types of Chassis Dyno
Roller dynos are an old fashioned system using metal drums mounted on bearings, where the whole car is strapped to the machine ontop of these drums. (Learn more about these in an upcoming video!)
Hub dynos represent a massive advancement in dyno technology as the car is directly bolted to the machine, this eliminates many ‘variables’ and the hidden cost of excessive tyre-wear during calibration. It also eliminates the risk of cars flying off the machine like you often see on youtube videos of rollers.
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