How to Prepare Your Honda Acura For The Dyno, So You Capture All The Horsepower

Before making test runs you have to prepare your Honda Acura car for the dyno test. Make sure you set your tire pressure to the same amount for all four wheels. Make sure you write it down for future references. It is also important to run the same tires and wheels because wheel weight and tire resistance makes a difference from run to run. If you are raising or lowering the car make sure the alignment is set the same way every time you do a run.

Once you have the car on the Dynojet you should have the operator do a coast down test. This will tell you how much horsepower is lost due to minor variations in the car's angle on the dyno. Any difference in cost down power lost should be added or subtracted from previous dyno runs. Until horsepower levels have stabilized do not consider any tuning adjustments. The engine should be fully warmed before the results can be trusted. Most naturally aspirated Honda Acura cars make the most horsepower on there second run and most will have stabilized power results after the 3 and 4 runs. =This is because of the heating of the intake tract on naturally aspirated engines. Turbo and supercharged Honda Acura make their best power on there first run before the intercoolers and air intakes become too hot. The variations between cold and hot run can  be as much as 5 horsepower on naturally aspirated engines and 30 horsepower for an intercooler turbo running a lot of boost.

Besides warming up the engine the transmission must be warm too. The best way to do that is to drive the car at least 15 minutes around town. A cold gear box with thick oil can rob as much as 5 horsepower. Run the dyno test with the same smoothing factor each time. The smoothing factor is how the Dynojet software smooth's out the dyno chart. The higher the smoothing factor, the lower the peak horsepower will be and the chart will be smoother. Lower smoothing factor will show a higher power peak but that is not realistic way to judge power increases. A smooth factor of 3 is usually the best.

Run the car with open hood and if possible, direct a small fan into the air intake. This will prevent hot air from the radiator fans being sucked from the air intake during the runs. It is possible to loose from 6 to 9 horsepower because the radiator fan blows hot air into the air intake. Finally make sure the dyno operator enters the correct humidity and temperature so the results are correct. 

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