Dyno Comparison


Before And After Bypassing The Throttle Body Coolant Lines

I told you the DYNO don't lie!!!


Here, the DYNO shows a 6.3 horsepower and 7.1 ft/lbs torque difference between having coolant run through the TB and bypassing it, with an average gain of 5.6 horsepower and 6.8 ft/lbs torque. The first test was made after driving the car for approximately 15 minutes. The Coolant and Air Intake Temp was monitored while making the run. At the beginning of the baseline run, the coolant was at 178F, intake air was at 80F, and the TB itself had a surface temp of 120F. After the bypass, the car was again brought to temp to repeat the test. This time, the coolant was at 180F, intake air was at 80F, and the TB was at 82F. To make sure the runs were accurate, the cruise was set on the DYNO to 70mph in 6th and the car ran for about 6 minutes. After this time, the TB had reached 100F. The car was left to cool down to 185F coolant temp, and 88F intake air temp. Running the car again with these elevated heat readings yielded another .2 horsepower and -.2 ft/lbs torque compared to before heat soaking the engine.

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