does Forza 6 simulate the weight of the fuel in the fuel tank?
if so, does the weight go down as the tank is being emptied?
also, is the weight located at the fuel tank location or is the weight spread into the entire car?
No I don’t think it incorporates that feature. That’s a very good question though. Maybe it will be in a future FM game
Fuel serves no purpose in this game except when running low to pit and fuel back up.
i asked the same question in F4 (i think it was), and a dev replied that, yes, they did model fuel weight
i see no reason for that to have changed
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lol thats my twitter, LOL!
Follow-up questions:
Is the simulated weight the same when damage is set to Cosmetic as it is when at Simulation?
With Simulation Damage enabled, does the car actually get lighter as the tank empties?
I remember F1 2011 having simulated fuel weight when damage was enabled, but when it was off the game treated the cars as having perfect condition tyres and an “empty” tank, resulting in much quicker laptimes.
In most races it is difficult to tell because 100 lbs of fuel in a 2500 lb car is a subtle difference. In a 1500 lb car, however, it’s noticeable.
In long online races I’ve noticed some cars running out of fuel earlier (1+ lap) depending on car choice or gear set-ups.
I have noticed no difference in weight concerning lap times. My laptimes are withen .1 from full tank to empty tank which i would attribute that driver apposed to fuel wear.
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im still interested to know if the weight is simulated at the fuel tank location or just spread out into the entire car itself.
im loving Forza 6 btw, amazing game you have given us Turn 10, i would still like to see car soccer make a return tho.
ISTR it’s modelled as a (decreasing) mass at the ‘proper’ origin of the tank - the thread i referred to (can’t find it on the legacy board, sorry) evolved into a discussion about honeycombed tanks to stop ‘slosh’ if i recall correctly (this was ~ 8 years ago, and i am very old 
)
Only kinda related, but this made me laugh so hard. Was showing a friend a couple of Formula E races, and he asked me how much they weigh when the batteries are empty. ROFL
In most cars the difference to performance of the car would be negligible. It’s only when you get down to the superlight racers with thirsty engines that fuel loads play an important role in handling/weight and therefore times.
But weight is always listed as dry kerb weight for the sake of specs, but the simulation does so much under the hood we don’t see who knows! lol
I know Dan G has said the engine uses more detailed numbers under the hood, i’ve no reason not to believe that, I just don’t think it’s gonna make a noticeable difference in most cars, for most people.
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One of the cars I have extensive testing with this on is the bac mono, a fuel hungry light weight car. Fuel is a static number despite what dan says. And the reason to believe that he is wrong is a highly in arguable laptimes. On modt tracks around 1:40 laps I can get 11-12 laps on a tank of fuel. Tank is 35 liters or 9.246 gallons. A gallon of petrol weighs 6.3 lbs. That’s 58.24 lbs of fuel. You actually believe that in a span of 11 laps u wouldn’t feel a weight loss of 50lbs and don’t believe it would effect lap times? There is no way. For a test go take a stock car and only change the rims from the lightest to the heaviest and tell me the lap times were exactly the same.
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But rims are unsprung weight and a fuel tank is sprung weight; 50lb rims would be like a 150lb fuel tank (I think). It might be better to do the aspiration glitch then add an intercooler (stock power and increased sprung weight).
That would be cool if they integrated fuel cells into the game, and then that’d just be one more piece of the puzzle. Determining how much fuel to run, so you choose a size cell, obviously each weighing different, and then being able to choose the location of cell, and how much fuel to run it etc etc, and then have the aerodynamics effect mpg lol…that would be pretty sick…obviously an insane amount of extra work, but I can dream right?
I said in regular cars. The Bac mono is not a regular car. It’s lightweight sports. So 50ib is a larger percentage of total weight. But when you’re in a car weighing 3500ib, that 50ib has a lot less effect. I said most cars for most people, not ALL cars for ALL people.
Either way, in the regular cars if u only upgraded rims between the lightest and heaviest and made no other changes I am willing to bet ud see a difference in lap time. Weight is the biggest factor in rl. If u can take 50+ lbs out of a vehicle anyone going for Performance would. Also I think the biggest place u would notice a difference is in the older muscle cars as they have relatively large tanks not 9 gallon tanks they had 2x that if not more. If they actually modeled fuel weight on a vehicle that had a 20+ gallon tank that’s 125+ lbs that should be coming out of the car. Tell me if in one of those cars you shouldn’t see a difference in lap time from full to low fuel? That to me is highly unlikely. I believe in a quarter mile I read some where thag losing 150 lbs would take off like .3. That’s only in a quarter mile drag, now on a track where you have to actually maneuver the weight losing thag much weight would be something nearly anyone would do… especially at a cost of 0 pi…
There is no sprung weight vs unsound weight, weight is weight in forza. Unless a developer says otherwise you are all overestimating the background calculation.
And as I said, try it on a muscle car with a 20+ gallon tank. This would be nearly the 150 lbs u speak of.
Also if it was actually calculated the fuel consumption would vary by car… not by motor. Do an engine swap and all cars get the same fuel consumption based on their engine.
Like I said test it for yourself. I know I can drive well enough to tell the differences, there is none as fuel is consumed.
I think it actually does simulate it, but I can’t prove it by showing you actual game code. It’s a 50/50 chance whether or not it’s simulated. ¯_(ツ)_/¯
Just to clarify a bit, 150lbs was just a generalization, not a meaningful number.
I actually don’t have an X1, so I can’t. I just posted because I had a feeling someone else would bring up sprung vs unsprung weight anyways, and I wanted this thread to show up in my topics so I could follow it.
Dan G has said in the past that unsprung weight is simulated in game separately. It’s why their tyre models are so complex.
Also how many times do I have to repeat, I said MOST cars for MOST people. Not YOU.
MOST people who play this game are typically casuals. They can’t even put in consistent lap times, never mind notice the difference of fuel load.
There is a Massive difference between generalisations (Which i was using), and specifics (Which you are using). Just because you notice something won’t mean most will.