Dinan software now online (610hp) - $3499

[Rboosted717]

Forget about the horsepower gain or top speed number, I want to see the shape of the power curve. Based on the graphs I've seen thus far for the other tunes on the market, the power is power/torque gains are all in the low-mid range rpm band.
Of course off the line in 1st gear you'll feel the increase, however, when it comes to rolling/passing acceleration you'll only be in the upper rpm range and will benefit very little. Check out the plot for the other unnamed tunes, then go drive your car and monitor the rpm range where you'll want to feel the power/torque increase, then review those same graphs.
Creating low-mid range power is easy on a factory turbocharged engine (most are mildly tuned/boosted in this area for drivability), however, creating additional top-end power can be very difficult, especially on an engine that's been optimized for top-end/ responsive power.
Personally, I'm very interested to see what BMW does for the new M5. I believe they'll most likely swap cam profiles, intake manifolds and possibly opt for a lower rotating assembly via engine or transmission internals. I could also see them increase power via an overboost option in the m-mode idrive system.
Regardless, I would wait to see what the more detailed tuners offer (unless Dinan truly made top-end power). Anyone can be first to market with an aggressive low/mid-range program, however, only the best will produce something that actually produces results in the quarter-mile and/or in 80-120+mph range.

[Aidan]

Originally Posted by Rboosted717

Forget about the horsepower gain or top speed number, I want to see the shape of the power curve. Based on the graphs I've seen thus far for the other tunes on the market, the power is power/torque gains are all in the low-mid range rpm band.
Of course off the line in 1st gear you'll feel the increase, however, when it comes to rolling/passing acceleration you'll only be in the upper rpm range and will benefit very little. Check out the plot for the other unnamed tunes, then go drive your car and monitor the rpm range where you'll want to feel the power/torque increase, then review those same graphs.
Creating low-mid range power is easy on a factory turbocharged engine (most are mildly tuned/boosted in this area for drivability), however, creating additional top-end power can be very difficult, especially on an engine that's been optimized for top-end/ responsive power. .

Very well said.