Auto Service and Performance has the area's only CHASSIS DYNO. We offer testing
and power tuning on all vehicles. We also can rent the Dyno and you can tune
your car yourself. Here are a few videos of it in action with customer cars:
The first thing that everybody must
remember is that a chassis dyno is a tool used for power-tuning a vehicle's
complete drive train. The dyno's purpose is to detect changes (good or bad) in
horsepower and torque with modifications done to the motor, transmission or
differential. One of the MAJOR differences in chassis dynos are whether they
are equipped with loaded rollers or unloaded rollers. Chassis dynos with
unloaded rollers (like DynoJet) cannot load the rollers to simulate the vehicle
weight or conditions. Basically, on a dyno with unloaded rollers, you are just
"spinning your wheels" and the computer software of the dyno tries to
compensate its readings for "no load" being placed on the rear wheels.
Unfortunately the vehicle's computer cannot compensate for "no load". A
vehicles computer system needs to see a load on the motor and drive train to
properly operate. So the only accurate way to power-tune a vehicle is to load
the rollers to the vehicles weight or testing conditions. Mustang Dynamometers
have loaded rollers and this is one of the reasons we chose this particular
dyno. As far as chassis dyno accuracy is concerned, it is only as good as the
tech that operates it, calibrates it, and maintains the dyno. Another important
factor of accuracy is whether or not the dyno is equipped with a SAE correction
factor and weather station. Our chassis dyno DOES have the SAE correction
factor and weather station. In addition, we have a wide band air/fuel ratio
meter- which is a must in anybody's book to power-tune properly and accurately.
As far as drive train loss is concerned, the automotive industry standard loss
is 20 to 25 percent for cars and 25 to 35 percent on SUV's and 4x4's. Our
Mustang Dynamometer has repeatedly supported these findings in ALL of our
testing performed on brand new Mustangs (GT's and Cobras), Camaros, Corvettes,
SUV's, etc. In our opinion, we feel that we are accurate in the "numbers"
resulting from our dyno testing.
In conclusion, we hope that we have helped clear up your concerns and questions
regarding the different types of chassis dynos and even though you may not see
high horsepower numbers - you will see real life conditions, numbers, and
air/fuel ratios. With the charts that you will receive afterwards, you will be
able to troubleshoot any existing problems and find what modifications are
necessary for horsepower gains.
The first thing that everybody must
remember is that a chassis dyno is a tool used for power-tuning a vehicle's
complete drive train. The dyno's purpose is to detect changes (good or bad) in
horsepower and torque with modifications done to the motor, transmission or
differential. One of the MAJOR differences in chassis dynos are whether they
are equipped with loaded rollers or unloaded rollers. Chassis dynos with
unloaded rollers (like DynoJet) cannot load the rollers to simulate the vehicle
weight or conditions. Basically, on a dyno with unloaded rollers, you are just
"spinning your wheels" and the computer software of the dyno tries to
compensate its readings for "no load" being placed on the rear wheels.
Unfortunately the vehicle's computer cannot compensate for "no load". A
vehicles computer system needs to see a load on the motor and drive train to
properly operate. So the only accurate way to power-tune a vehicle is to load
the rollers to the vehicles weight or testing conditions. Mustang Dynamometers
have loaded rollers and this is one of the reasons we chose this particular
dyno. As far as chassis dyno accuracy is concerned, it is only as good as the
tech that operates it, calibrates it, and maintains the dyno. Another important
factor of accuracy is whether or not the dyno is equipped with a SAE correction
factor and weather station. Our chassis dyno DOES have the SAE correction
factor and weather station. In addition, we have a wide band air/fuel ratio
meter- which is a must in anybody's book to power-tune properly and accurately.
As far as drive train loss is concerned, the automotive industry standard loss
is 20 to 25 percent for cars and 25 to 35 percent on SUV's and 4x4's. Our
Mustang Dynamometer has repeatedly supported these findings in ALL of our
testing performed on brand new Mustangs (GT's and Cobras), Camaros, Corvettes,
SUV's, etc. In our opinion, we feel that we are accurate in the "numbers"
resulting from our dyno testing.