I’ll preface this by saying I’m a new viewer of the WEC so I don’t know all the background on the cars. Anyway I’ve been racing the LMP1 cars in FM7 a lot and I normally use one of the two 919 Hybrids. Why is it that the 2lt V4 Porsche 919 Hybrids are only able to go about half the distance of the Peugeot 908 with it’s 5.5lt V12? Seems like unless the 908 had an enormous fuel tank the 919 Hybrid should be able to at least match it on pit strategy.
When I do longer races in the 919 Hybrid cars I’m having to require Quick Stops just to make sure things are even.
The 908 is also a diesel - the Peugeot and Audi diesel LMP cars were specifically designed to go extra-long between fuel stops to make up for any performance disadvantage they had (since LMP tyres last multiple stops, they need to pit for fuel much more often).
I’m yet to investigate it though, but I wouldn’t be surprised if the game is not capable of handling the hybrid system properly (energy recovery etc) which means the power that should be coming from the battery is in fact coming from the engine, thus burning more fuel than in real life.
The 919 gets no mileage from electric motors. Its s recovery system that delivers power not economy. The power that it generates is used, not stored and the combustion engine is anything but economical.
Don’t know how to answer your first question because I clearly said the electric motors provide power - they just don’t improve MPG/KPL.
The 919 won LeMans while swallowing around 520 gallons of fuel (2364 litre). Just do the math.
It doesn’t matter if a car is an electric hybrid, hydrogen hybrid, deisel or petrol combustion or if its powered by pixy dust. Its fuel consumption is its fuel consumption.
LOL
If the electric motor provides power then it’s improving mpg.
That or it has on-board pizza oven that the electric motors are powering.
Why do you think hybrid cars are being bought by the public?
The number of gallons is irrelevant. (Unless you include how many gallons the competitors used and how their electric power usage compares to the 919.)
The time between stops is what matters.
The 919 is very close to the competitors it raced against in real life. Which is the OP’s point - the game screwed this up.
FM: Forza is NO SIMULATION! It’s a videogame for kids. End of the story !
RL: >500 HP V4 turbo petrol + hybrid vs. a V12 diesel.
both have a total different homologation. The fuel tank of the 908 is 30% bigger, etc.
The 919 hybrid has btw a battery (2,22 kWh) ! = power of 294 kW for max 27 seconds of full throttle (KERS). The power of the hybrid (battery) goes to the front, while the petrol power only goes to the back.
So @Le Mans LMP Cars are not allowed to consume more than 5,04 litres per lap. The 919 hybrid has a tank size of 62,3 litres. Even if it hits the limit of 5,04 litres a lap, it should make at least 11 laps before pitting.
(While the Lap is 13,629 kilometres long that makes 37 litres per 100 kilometres.)
Electric engines in racing cars and certain McLaren production models are indeed used for power rather than mileage but not in the sense most people would assume. The electric engines in these cars generally provide power and torque only when you’re at low rpm and your turbo is still spooling up.
And even if it is a performance hybrid rather than an economy one, max power will most likely still be a combination of electric and petrol power. Thus, if you remove the electric power and have to up the petrol power to make up the difference, naturally you will get worse consumption (or you’ll keep power the same and have worse performance).
This is also the basis behind some of the rumours regarding McLaren P1s and LaFerraris not completing Nurburging lap-times, because they apparently don’t have the battery reserves to last an entire lap running as a hybrid so the final sectors are much slower (on petrol alone).
The way to look at it is without using the electric motors the 919 would lap in lets say 3.21 and consume 8 litres of fuel.
Using electric power it will lap in 3.18 and consume 8 litres of fuel.
MPG is difficult to calculate on 2017 LMP1s because the regs are based on the calorific value of fuel and its flow. It isnt any longer a case of xx volume per lap or km.
In any event, back to the OP. Racing cars built around different homolgations/eras is always going to be difficult in FM. Your solution to use quickstops to level the field is the way to go.
The 908 HDI FAP has I think a 81 litre tank and the 919 is only just over 63, so even through the 2014 LMP1 Hybrids are using 40% less fuel they stop just as much. At Le Mans the 919 could do 13 lap stints and the tyres could do 39 laps, but I don’t think this has been possible in any Forza for any car (in one of the old games I remember an AI only doing 4 laps). To put that into perspective, the LMP2 cars which produce the same power from the ICE (600bhp) as the 2014 P1s get around 10 laps form 75 litres and the 800bhp Poojoe gets 12 laps from its 81.
While the Hybrid helps with fuel economy its mostly used to give the cars insane acceleration, and that’s where 95% of the 6 seconds a lap quicker they are over the regular P1s and in fact most of the fuel is saved by lifting and coasting and the 100kg per hour fuel flow, the lower drag and 55kg weight saving over old old rules 908 HDI FAP.
But the reason the fuel numbers don’t work in Forza is that the hybrid system isn’t simulated. Its why the hybrids in the game have been given what their average power would be. The Audi R18 instead of being 550bhp 66% of the lap and say 900 the other 3rd is just 750bhp and 4wd all the time.
You also have to take into account that in real life the numbers quoted for race cars are a lot below what the really put out. I remember seeing somewhere that with the power levels either Audi or Peugeot claimed they where using, they wouldn’t have been able to hit the top speeds they did or would have had to have unrealistically low drag.
So while in real life the Porsche is producing 500-600bhp from its 2.0 litre V4, Forza’s physics engine will have it producing 900bhp from its 2.0l V4. The same story with the 908, IRL 900bhp from 5.5 V12, Forza- 700bhp from its 5.5 V12. Add in that unlike the road cars Turn10 won’t have access to actual lift and drag numbers and that’s how you end up with really inaccurate performance,
