Quote:
Originally Posted by gwyllion
In 2008 the Peugeot was said to have around 730 bhp. This year the Peugeots were faster than in 2008, so the engine still produces a lot more than 700 bhp.
Officially petrol engines produce 650 bhp, but in practice they probably have around 670 bhp. The 4% restrictor increase means that petrols now have 700 bhp. Hence, my comment that they are still down on power.
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The same proportion WAS already true for petrol as for diesel... there is no poor mr petrol, all the contrary... now with 4% more so in favor of petrol (why doesn't ACO abolish diesel, because it seems that is what they are pressed to do, or press conference calling stupid to teams and constructors why there isn't more diesel engines)... the point is that petrol engines are designed to be lighter (less strong) and more balanced in order to attain those high revs, so when they are stressed to achieve those high rates of power that "potentially" are there, they tend to break much more often than diesels... and consume disproportional amounts of fuel...
There is no dirty game with max power numbers with neither of the techs... actually those max power numbers mean very little... Buggati Veyron road super car has 1000 HP, BUT pushing in 4th gear with the engine in "high rev" but very far from its max velocity of 400Km/h of its 6th gear, higher than any Lemans prototype now... meaning that MAX velocity depends more on the ability of the engine to withstand some specific load,... meaning torque is more important... meaning a 750HP F1 engine would be the laughing stock if put in a Lemans prototype because the weight and the loads are much more greater in those last ones( it could never reach those 750HP)
What is officially knowned is not what corresponds in practise... matter of fact with modern electronics and telemetry the same exact engine dosen't have the same exact caractirist values of power, torque, fuel consumption all the time during the race and qualifying sessions ... because "engine parameters" are constantly being modified from the pits according to race conditions.
Quote:
Originally Posted by gwyllion
... and with diesel you can magically increase power without decreasing fuel consumption
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Yes and no... both in a dynamic and in a static way... there are more than first meats the eyes of engine parameters that can be tweaked.
But to illustrate in a gross mode... have you seen the movie that some guy wanted to blow a big save door with a relative small explosive, so he filled the save with water first so that the force of the explosion could create a much more greater "pressure wave" inside the save... had he puted the "small" bomb outside attached to the door only a small scratch would result... in the first form he blew the door...
transponding the example to engines, the water is the "compression rate" of the engine... AND that is the biggest advantage of diesels... so its possible to have more power in the same motor... changing motor heads to have more compression... and sometimes "consume less" at the same time... and there isn't anything magical about it... its pure thermodynamics physics. ONLY that petrol engines cannot pursue that route, but to a very small extent, because of auto combustion "knocking" effects... due to the chemical and physical characteristics of Gasoline... an very poor substance for a ICE IMHO.
Quote:
Originally Posted by gwyllion
When Peugeot was running in full attack mode, they were running 11 lap stints instead of the 13 lap stints in fuel saving mode.
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Of course engine parameters modified then to be more "agresssive" , consuming more due to more higher average revs... and perhaps also less fuel between stops to run lighter with less weight.