Quote:
Originally Posted by arakis
in other words, a car with 7000rpm redline and a car with 5000rpm redline will have proportionaly different gear ratios, in other word if car one has 500nm on the engine output at 50kmh in 1st gear, and the other car has 550nm at 50kmh in 1st, car 1 will have more torque at the wheels by exacly ((7000rpm/5000rpm)*500nm)/550nm==(1.4*500)/550==700/550 witch is1.27
or at 50kmh the car1 with the higher redline and lower torque will have more force to push the car by 27%
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Sorry, but I don't understand your example. Using the formula on
wikipedia:
- Car1 has 500 Nm * 7000 rpm / 9549 = 366 kW.
- Car2 has 550 Nm * 5000 rpm / 9549 = 288 kW.
Yes, that the first car has 27% more power.
That is exactly why the ACO rules intend to give all engine configurations (NA petrol, GT1 petrol, turbo petrol, turbo diesel) the same power.
Quote:
Originally Posted by arakis
if you have 5.5l twin turbo petrol race engine with the same restrictors as the diesel I am 100% sure we would have seen power and torque number out of this world, at the very least I would expect 800hp and 1500nm minimum
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That is obvious. A diesel engine runs on a lean mixture and a petrol engine with a (near) stoichiometric mixture. So with the same amount of air, a petrol engine can burn more fuel and hence produce more power.