Dear Tuners! November 11 to 30 I'll be on a business trip out of the office. All the orders placed during that period will be processed at the begining of December. I'll do my best to answer your messages at least twice a day, but I won't be available for remote desktop sessions.

Power reading troubleshooting

Power reading too low

  • Worn out engine
  • Poor quality fuel
  • Faulty engine control – error codes active
  • High intake air temperature
  • Run too short for turbocharger to spool up
  • False advertising on performance parts power gain
  • Moment of inertia calibration too low
    • SETTINGS / Roller / Connected inertia
    • PROJECT / Eng. inertia
    • PROJECT / DT. inertia
  • Power transfer efficiency corrections too low
    • SETTINGS / General / Loss from load factor
    • PROJECT / DT loss factor
  • Improper load cell calibration
  • Coastdown losses not measured or not calculated

Power reading too high

  • Vehicle left in gear on coastdown losses measurement or brake pedal pressed on coastdown
  • Faulty engine control – turbocharger pressure too high
  • Moment of inertia calibration too high
  • Power transfer efficiency corrections too high
  • Improper load cell calibration
  • Internal loss model for dyno or rollers set too high

Inconsistent power reading

  • Faulty engine control
  • Engine control corrections kicking in due to high temperatures or knocking
    • Boost pressure reduction
    • Ignition angle retardation
  • Wheel slippage or wheel losing contact with one of the twin rollers
  • Leak in the intake air system with supercharger / turbocharger

Different power readings on different gears

  • Incorrect or skipped engine moment of inertia correction in PROJECT / Eng. inertia
  • Different gearbox efficiency in different gears. Some gearboxes have direct 1:1 drive in 4th or 5th gear, where the efficiency is higher than in other gears.