Dyno tuning

 

Dyno Tuning

 


When it comes to dyno equipment, ST Hi-Tec uses none but the best – the “Dynapack Evolution 4000 Chasis Dynamometers”. A 2WD/4WD capable hub dyno capable of supporting up to 1100HP in 2WD configuration, or 2200HP when in 4WD mode.

The Dynapack’s unique hydraulic operation allows it to quickly and easily measure engine and drive line performance with sensitivity capable of measuring the headlights being turned on.

What is the advantage of the hub dyno over the conventional roller dyno? The main difference will be accuracy in the results. With a hub dyno, variables which can affect the final power readout (such as the slip between the roller and the tyres, the slip between the roller and its drive belt, etc.) are omitted. By using the Dynapack dyno and eliminating these variables, we can get a solid and accurate readout. The Dynapack gives accurate readout of the followings: Torque and power, air/fuel ratio, torque split (4WD mode), gas analyser (HC, CO, CO2, AFR, NOX, O2), plus many more.


SETUP STEP 1:

Set the car to be tuned inside the dyno room. Jack up the wheels (2WD/4WD) and attach the hub onto the hub of the dynomometer using the dyno’s lock nuts.

 

SETUP STEP 2:

The Air Fuel Sensor is being tapped into the middle section of the exhaust. This allows the best measurement for A/F ratio. The rear of the exhaust is also being connected to the ventilation pipe to ensure no circulation of toxic gas occurs inside the dyno room.


 


SETUP STEP 3:

The boost sensor is neatly “T” plumbed into the existing vacuum lines near the intake manifold. For turbo cars, boost is being measured, and for NA the vacuum is measured.


 

SETUP STEP 4:

Air temperature sensor is placed near the front of the car where the airfilter is located to ensure a true “cruising” temperature.


 

SETUP STEP 5:

ST Hitec uses HKS Knocking Amp to monitor the amount of knocking/pinging that is occuring inside the engine during a dyno run. This eliminates the risk of engine detonation during a power tune.


 

TUNE STEP 1:

During the tuning phase number one, the dyno is set on cruising mode, which will provide the dyno a “base” figure before any tuning commences.


 

TUNE STEP 2:

Tune up required for power run. Boost levels will be adjusted here for forced-induction cars, at customers request (within safety). The correct fuel points, timing, and A/F ratio are adjusted to achieve maximum power!


 

TUNE STEP 3:

The maximum power run is saved in the computer, and the dyno graph with power, torque, AF, boost printed out for keeping record. This completes the dyno tuning cycle at ST Hitec.