Some early adopters of the NSX Pure900 wanted to test their performance and raced against NSXs equipped with JB4. Both Pure900 cars lost, leading to frustration and raising doubts about whether the Pure900 is actually faster than the JB4. Unfortunately, neither party had footage to support their claims (not that we don't believe them). To settle the debate and make a fair comparison, I met up with Mark, who has a Type S with full bolt-ons and JB4. I had just received my car back from SOS after upgrading to the Pure900 with Ktuner Stage 4, which unleashes approximately 750+ whp for the NSX.
We did several runs from a dig and rolling starts. Both cars were balanced in terms of tire pressure, passenger weight, and same wheel size to ensure no factors contributed to differences in performance. For companions, the JB4 puts out about 610 whp, while the Pure900 produces approximately 725 whp (according to the SOS dyno).
Testing in uncontrolled environments presents challenges, such as reaction time and getting the same launch, which is evident in the footage. When the Pure900 got a better launch, the JB4 was unable to close the gap, and both cars went side by side. Similarly, when the JB4 got a better launch, the Pure900 couldn't close the gap either. This is puzzling because the Pure900 has a 120 whp advantage over the JB4, yet it was still unable to pass the JB4 or create a gap when it got a better launch.
Long story short, there's definitely something off with the Pure900 tune. One constant across all Ktuner maps (1/2/3/4) is the torque curve at 620 whp, while the horsepower increases with each higher tune.
Since the TCU is responsible for continuously monitoring various parameters, such as engine power output, transmission temperature, and vehicle speed, it may take action if it detects that the engine is producing more power than the transmission can safely manage. I suspect it could be adjusting shifts, limiting torque, or employing some kind of safety mechanism. Acura has designed this car with a clever system where each module incorporates some kind of safety feature. The only way to truly understand what is happening is by examining the logs to determine where the power is being cut. I will be sending lots to help determine that.
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We did several runs from a dig and rolling starts. Both cars were balanced in terms of tire pressure, passenger weight, and same wheel size to ensure no factors contributed to differences in performance. For companions, the JB4 puts out about 610 whp, while the Pure900 produces approximately 725 whp (according to the SOS dyno).
Testing in uncontrolled environments presents challenges, such as reaction time and getting the same launch, which is evident in the footage. When the Pure900 got a better launch, the JB4 was unable to close the gap, and both cars went side by side. Similarly, when the JB4 got a better launch, the Pure900 couldn't close the gap either. This is puzzling because the Pure900 has a 120 whp advantage over the JB4, yet it was still unable to pass the JB4 or create a gap when it got a better launch.
Long story short, there's definitely something off with the Pure900 tune. One constant across all Ktuner maps (1/2/3/4) is the torque curve at 620 whp, while the horsepower increases with each higher tune.
Since the TCU is responsible for continuously monitoring various parameters, such as engine power output, transmission temperature, and vehicle speed, it may take action if it detects that the engine is producing more power than the transmission can safely manage. I suspect it could be adjusting shifts, limiting torque, or employing some kind of safety mechanism. Acura has designed this car with a clever system where each module incorporates some kind of safety feature. The only way to truly understand what is happening is by examining the logs to determine where the power is being cut. I will be sending lots to help determine that.
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