Performance Trends, Inc.

Producing Quality Computer Tools for Racers and Engine Builders since 1986

Re: Performance Trends Newsletter (updates)

 To: Visitors to Performance Trends Website

Subject: Product News/Updates, June 2023

    1. Accurate Dyno Torque Measurements
    2. Join our Team
    3. Last May's Newsletter

 

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1) Accurate Dyno Torque Measurements  We often get calls when someone's torque and HP measurements seem to be low.  (We rarely get calls when the torque seems too high.   )  If your torque is low by, say, 3%, your HP is also low by 3%.  Here's some basic items to check that your torque is accurate from your brake dyno:

  1. Does the dyno read 0 torque when the engine is not running?  If it reads negative (below zero) you are torque reading too low by this amount.  Conversely if it reads above zero you are reading the torque too high by that amount.
  2. When you calibrate the torque by hanging weights, do you account for the torque added by bolting the arm to the dyno?  This can be very significant, up to 20 ft lbs or more.  If you don't account for this, your torque will read too low by this amount.
  3. If you are running an accelerating test, the inertia of the engine and water brake are storing  power in their rotating inertia.  This power does not show up on the torque sensor and reduces the power measured.  The faster the acceleration rate, the more power absorbed, and the lower the torque and HP you measure.  This inertia effect can reduce the power you measure by 3-10%, or more.  The DataMite software allows for you to correct for this effect, bumping up your results to correctly  match what the power would be for a steady state test, or a test with a very slow acceleration rate.
  4. Do you have any hoses attached to the dyno (water brake) which could put a torque on the dyno during the test, when the water pressures change, or temperatures change.

 

Dyno Controller Settings v4.2B.jpg (232170 bytes) click here for an FAQ on re-zeroing your torque sensor

Dyno Controller Hybrid Control v4.2B.jpg (261044 bytes) click here for an FAQ on hanging weights and accounting for the torque of the arm

Finding-CG-Dyno-Calibration-Arm.gif (15968 bytes)  (click image to enlarge it

Dyno Controller Hybrid Control v4.2B.jpg (261044 bytes) click here for another FAQ on hanging weights

Dyno Controller Current Readings Options v4.2B.jpg (179576 bytes) click here for an FAQ on getting accurate brake dyno results, and info about load from hoses and inertia effects

Dyno Controller Current Readings Options v4.2B.jpg (179576 bytes) click here for an FAQ on correcting for inertia effects

 

Dyno Controller Current Readings Options v4.2B.jpg (179576 bytes) click here for all our FAQs on the Dyno DataMite electronics and software

 

Dyno Controller Current Readings Options v4.2B.jpg (179576 bytes) click here info on our Dyno DataMite data loggers and software

 

Dyno Controller Current Readings Options v4.2B.jpg (179576 bytes) click here info on our Enterprise Edition of the Dyno DataMite software, screen shown above

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2) Join Our Team  We are looking for a special, versatile engineer to join our team here in Livonia, MI.  We need someone with a mix of electrical and mechanical backgrounds, and a passion for motorsports or engine building.

  for more info, and to contact us.

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3)  Last May's Newsletter  Here are the topics covered in our previous newsletter.  If you would like another copy of May 2023's newsletter (or any previous newsletter) for detail on these topics, visit our website at: Performance Trends Newsletters 

  1. Dyno Controller - New Features
  2. Join Our Team
  3. Do you want to measure cams?
  4. Last April's Newsletter

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