TonyAtRWHP

I've been doing this a long time, I can tell you first hand, it wouldn't have made more than a negligible difference in power having the fans on or off.

However, there is a pair of large ducted fan in the front of the trailer, just out of view of the camera, it likely wouldn't have mattered much on or off.

That large fan in front of the other dyno is doing ALOT less than you think. It's blowing a large cfm of air "at" the front of the car, but hardly much if any of it is actually making it through the grille, radiator, etc.

05RollaXRS

Porsche 911 GT2 RS vs Mclaren MP4-12c vs Lexus LFA

Back to back dyno results (MD performance, Westminster California)

Porsche GT2 RS - 565 wheel HP
Lexus LFA - 515 wheel HP
McLaren MP4-12C - 515 wheel HP

gengar

I'm sure this test was from a while ago, but I either didn't see it or forgot. Anyway, amazing that both the LFA and MP4-12C make 515 rwhp, given the MP4-12C is rated at 592bhp compared to the LFA's 552.

Also amazing is not only how flat the LFA's torque curve is, but how linear the hp curve is. The graph just shows what I and other LFA drivers have discovered through experience.