Your portable chassis dynamometer provider.
11131 Southtowne Square, Suite C    St. Louis, MO 63123
Phone: (314)416-1121    E-mail:
ronhagen@tracklab.biz

Track Lab has a mobile Model 248 Dynojet that can test up to 2500 h.p. and 3,000 ft lbs.
Dynojet Rental is available.

Dyno Jet at NOPI St.Louis when installed in an enclosed race trailer from Schneider Motor Sports

Graphs of Mike Imhoff’s car before(blue) and after(red) having Superchips Custom Tuning tune his car on the Dynojet at the World Ford Challenge at Gateway International Raceway

The dark red/blue lines on the top graph are torque, the other line are horse power, and the bottom graph is the air to fuel ratio.

Strozenberg’s dyno run from WFC (right)

COMPARISON TO ENGINE DYNO;

  • Generally no accessory drive are installed on engine
  • High efficiency headers & appropriate straight through exhausts are generally different than vehicles headers & exhaust systems
  • Air Density ( humidity & temperature) are controlled and not corrected for SAE standards
  • Flywheel transmission drive line differentials & wheels are not robbed of power
  • Controlled Fuel Temps.

Custom Trailer by Take3Trailers
Click Image for larger preview

WHY SHOULD I USE A CHASSIS DYNAMOMETER

  1. To learn the performance characteristics of the vehicle so that it can be operated in “The Sweet Spot,” the horsepower, torque, and air to fuel ratio are graphed against RPM.
  2. Diagnostics are accomplished quickly and many times with greater accuracy than the on board diagnostics. On carborated cars its very difficult to find a torque converter starting to fail.
  3. Dynoing before then after adding performance parts will allow you to confirm if the part increased your power/torque.
  4. Using the dyno as a load cell, either throughout the dynamic range or holding in steady state, a tuner can maximize the vehicles performance potential.
  5. A new or rebuild engine can be “Run In” under controlled conditions on the dyno, allowing for quick discovery of problems that can become catastrophic.
  6. If the tuner is working with your ACCEL DFI total engine management CALMAP, a dyno load cell is imperative.
  7. Re-jetting is easier when on the dyno. The tuner can see if the change is necessary and what the effect is. Every time there is a weather change the jets may be wrong, which will result in lack of consistent runs.
  8. Consistently repeatable numbers.
  9. To make more noise and get bigger numbers than your friends.

IS IT SAFE FOR MY ENGINE, TRANSMISSION, AND AXLES TO RUN ON A DYNO?

  1. On the dyno, the drive train is not subjected to the substantial “Launch Loads” as would occur during street/track tests.
  2. Air to fuel ratio, EGT, Oil PSI & temp, along with water temp can be more closely monitored on the dyno and the test can be more quickly aborted if a problem occurs.
  3. Very little tire wear with the Dynojet. Brakes do not get heated because the Dynojet uses its own braking system.

Karr’s dyno run from WFC (below)

ARE THE NUMBERS ACCURATE?

  1. We have run our team’s race cars on BOTH dynos the same day within a close time interval and we got within 5 HP (1%-3%) between the two dynos with each car. All the numbers we get check out with the engine builder’s HP estimate when we apply the standard correction factor(correction for loss due to drive train).
  2. We have run, on the Dynapack, a 2002 Corvette with 13,000 miles and no mods, and got numbers the factory quotes for the engine after applying the standard correction factor.
  3. We have run a Mustang Pro Drag race car, with and without nitrous, on the Dynojet and got very similar numbers to the car owner’s own shop’s Dynojet.
  4. Constantly repeatable numbers

Our best Guess on the difference Between Drive wheel H.P. & Flywheel H.P. is an 18% loss Manual and a 25% loss Automatic.

Example If your Vehicle produces 400 H.P. at the wheels with a manual transmission it would be about 472 H.P. at the Flywheel or 500 H.P. with an automatic.

This is just a guess with everything in the drive line working properly.

 

Track Lab.biz
66
11131 Southtowne Square, Suite C    St. Louis, MO 63123
Phone: (314)416-1121 
E-mail: ronhagen@tracklab.biz

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