Loading on the parts of an engine when pressure is different

All that has to do with the power train, gearbox, clutch, fuels and lubricants, etc. Generally the mechanical side of Formula One.
tadzio89
tadzio89
0
Joined: 13 May 2009, 16:52

Loading on the parts of an engine when pressure is different

Post

Mario Theissen, BMW Motorsport Director

"Due to the thinner air, all engines lose around eight per cent of their output. This makes the engine wear a little less as the loading on the crank assembly is slightly reduced."

"The reduced atmospheric pressure costs the engines around 7% of their power output; as a result, the 62% of the lap spent at full throttle is equivalent to 56% at sea level. While this reduces the demands on some components such as the pistons, other parts of the engine, such as the crankshaft, are still subjected to significant loadings."

from: http://www.f1technical.net/news/13559

1st to to Tomba. what is the source of that information?
2nd to all: who is right? which parts are loaded more/less?