FAQ / Technical

WHY TUNE ON AN EDDY CURRENT DYNO AND NOT ON AN INERTIA DYNO OR STREET TUNE!

By street tuning you can get the fuel very close however not exact.  On the street or on an inertia dyno the engine is always going through transient conditions.  With an eddy current dyno the engine can be held "steady state" at an exact RPM and Load being every cel in the VE MAP.  This way the air model of the engine is accurate allowing the remaining MAPs, calculations and all transients to be tuned appropriately.  By doing this all of the acceleration, deceleration, startup, warmup, etc conditions will be correct.

On the street there is no feedback of torque or horsepower so it is impossible to tune the appropriate timing the engine needs.  With an inertia dyno the WOT timing can be tuned close however the part throttle timing cannot be tuned.  The large inertia of an inertia dyno results in less resolution of the horsepower measured therefore not as accurate of timing tuning.  On an eddy current dyno with precision control such as the Dyno Dynamics used at Lo-ET Designz the engine is tuned for MBT, Maximum Brake Torque, in every cel of the timing map and therefore every condition you can drive your vehicle.