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Here's another video that jumps around a bit but a good chunk of it is a mid-season test at Silverstone. It might be the Monday and Tuesday after the British GP, in July. They are testing a new specification engine and I know they got an upgrade for the Silverstone race.
Note that about 8:27 into the video that Pat Fry is talking to Giorgio Ascanelli and describing an odd behavior of the car, when the engine is revved after a start and the car is still stationary, the entire car is jumping up and down, maybe 3mm at the front and 4-5mm at the rear. Hopefully it wasn't doing that on the track in corners, as the drivers got on and off of the throttle. A 1mm ride height change was enough to change the car's behavior in a corner.
Also note that they are talking to Mika about a driving problem he's having. He thinks there's something wrong with the engine, the engineers think it's a driver problem. He's losing nearly a second compared to Michael in the Magotts/Becketts complex. It's a left, right, left, right, left sequence of corners, taken at pretty high speed and the drivers have to slow down (and maybe drop a gear) going from Maggotts into Becketts. Mika is afraid he's going to lose the rear on entry and Michael is braking quite a bit later. They are running slightly different aero settings, but nearly a second is a huge chunk of time, in that short section of track.
Also note that they mentioned Michael doing a 1:22.5 lap time on his first run on day two. For reference, the fastest lap of the race that year was a 1:22.8, although they went faster in qualifying trim.
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