Quote:
Originally Posted by XutvJet
This is exactly what is happening with the G80. By hitting it from a 5mph roll, you take away G80s ability to launch because you can't brake stall the torque converter to build boost for a killer launch. Rolling at 5mph and the G80 is caught in low rpms and off boost. There will be a noticeable lag before the turbos ramp up to compensate for lack of load against the motor.
Turbos need load to build full boost. It's also why turbos don't generate full boost in 1st gear. There's simply too much torque multiplication in 1st gear (i.e., less load on the motor to accelerate). Yes, the S58 can theoretically generate max boost below 2,000rpms, but in order for that to happen, the G80 would need to be in a tall gear. It ain't happening in 1st, especially from a 5mph roll. No amount of electronic wizardy can overcome this effect.
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Someone here should email and ask car and driver how they do it. They know about turbo lag. All this is speculation (in terms of how they do the testing). They may be doing it in a way that removes turbo lag from the picture. Might as well ask them