Questioning the physics of the Cadillac Limo

To me, Forza Motorsport, whilst being more focused on fun, had a foot firmly planted in reality, I am questioning this with the release of the latest DLC pack.

Now, I’ve never driven a Limo in real life, but I am astounded at how well and fast the limo, in stock form, can lap Brands Hatch, it does it so well that it has me questioning just how realistic it is.

Also, the MB W154, a car that is over 70 years old, handles pretty much like (apart from longer braking distances) any other A class car.

And for the Limo, when tuned to B Class, it is a very competitive car. Something i did not expect at all from this type of car.

I think the best way for me to deal with my disappointment in simulation racing is to just accept that it’s a video game and racing in Forza is no more comparable to the real thing than joining the Marines and being deployed to Afghanistan compares to playing Battlefield 4.

I really don’t have enough experience in the field of physics programming to know whether iRacing vs Project Cars vs Forza vs SimRaceway vs Need For Speed or whatever game you pick is more or less realistic, all I know is I’ve raced real cars on real tracks and it’s nothing like driving in Forza 6.

So the Cadillac Limo drives exactly how the physics programming team designed it to drive, nothing more nothing less. Trying to compare it to real life seems to be a dead end. With a dead horse at the end that’s been flogged on these forums to absurd extent.

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100% agree.

I get what you’re saying, but like I said in the OP, FM has always, if only a nod in the direction of, been an appropriation of simulation, and this iteration of the franchise has (seemingly) taken another step away from that.

I would be interested to hear about the process of creating the physics for the Limo, and what the goal was, if it was just to have fun, and not simulate the source material, then that’s fine, but if that is the direction that the franchise is taking, this could be the last one for me.

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Well, something about real performance of over 70 years old cars.

Some Nordschleife Times (best laps from GP races), you may try youself in FM6 tu run someting better than 9:45 in a 30’s car (without tuning)

Mercedes-Benz W25 1935: 10:32
Mercedes-Benz W25K 1936: 10:03
Auto Union Type C 1937: 9:53
Mercedes-Benz W154 1939: 9:43

I will check later today what the FM6 W154 can do …

Some footage from Nurburgring Nordschleife …

Mercedes Benz W25, W125, W154

Some historical Nordschleife Times,

List of Nordschleife lap times (racing)

Historic GP Results (1925 to 1941)

THE GOLDEN ERA

Oh, and some interesting side note to the W125 … for 100 km you consume 130 l fuel and 1 l oil. Fuel was a mixture of 85% Methylalcohol, 8% Aceton and the rest benzol and aether.

Interesting, thanks.

Great footage! I really love the classic cars in Forza.

OK dear “I’m so realistic” Forza 6 … maybe you are for modern cars, but …

W154, stock, not touched anything (and i think there is a lot to improve, just in setup). Nordschleife instant 8:25,164 (dirty). Well, it is much better tarmac than in th 30’s and it should be considdered 21st century rubber. But I’m just a average driver. So, that’s much to fast. I think a expirienced FM6 driver can do below 8 minutes without a problem.

Whoever is interested, I saved my replay from rivals run.

Edit: Tune by Raceboy77, modern racing tyres, moder brakes, modern diff, good setup … below 8 minutes with no problem

Assuming your 8:25 was a flying lap in a stock W154, this is actually a good result. In a brief search, one of the best W154 times I could find was the 1938 qualifying time of 9:43 on the old 22.8km layout with the sudkehre. This was the keyhole loop with the paddocks and start/finish used into the 70’s, not the longer sudschleife. Applying the average speed for 22.8km to the modern 20.6km circuit, a theoretical hot lap in FM6 should be about 8:46. Accounting for better conditions in FM6, art doesn’t perfectly imitate life, etc., a difference of just 20s (4%) is very good.

So you’re upset that an A class car can keep up with other A class cars? lol
I think you’re forgetting that at the time these were the pinnacle of automotive engineering of the time and the only real advancements since then have been efficiency, safety and lighter/stronger materials. But for speed, they were pretty good already by that time. So I think it’s just a case of incorrect expectations, cos I think those older cars a bit “lively”, especially with a controller. lol
We need to compare some genuine times and see how it comes out. I mean, if it’s a massive difference we can at least ask for it to be looked at. :slight_smile:

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Well, If I can go instantly 1;15 faster than Manfred von Brauchitsch … thats to much, even considdered the little shorter trac compared to original.

Nordschleife differences to original layout:

The schikane at the end of the long straight was not existing. The long straight was continuing to the end of the straight at today GP Course. There was a circle (similar to "Karussell), from there back to where the Start of Nordschleife in FM6 is.

Layout documented at Wikipedia: Track Layout and Zone Names

This. BBTD is 100% correct. Cars like the Autounion Type D were decades ahead of their time, and much of the tech pioneered in these ingenious machines is still in use today.

Aside from materials, efficiency, and everything BBTD mentioned, there is another factor to driving these antiques fast, one that cannot be replicated in ANY conole game: ergonomics.

Cars like the AU Type D or MB W125 were absolutely EXHAUSTING to drive- one lap of Nurburgring in one of these badboys and you’d be ready for bed. A modern LMP or GT car is a luxury hotel suite by comparison. The fact we get to drive these cars WITHOUT the physical/sensory assault (and straight-up fear for life and limb) they deliver IRL goes a long, long way in the “easy-to-drive” department.

OT, re: limo. I’m not surprised it’s a good car. Picture this: You’re Barack Obama’s chauffer. You’re driving the Commander-In-Chief to some function or another, when a terrorist attack goes down, one intent on assassination. “Time to get the hell outta Dodge”, the President says, calmly.

You’d better have a capable vehicle: no worries, the fine men & women at Cadillac GOT this one.

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The Cadillac XTS limo in FM6 isn’t The Beast, that one has a Chevrolet Kodiak chassis with a Cadillac DTS-like body. Entirely different car.

And it weighs A LOT. Not particularly good at escaping anything faster than a moped. I get what you’re saying though, I just feel like being pedantic. Lol

Yes, but the beast is based on our limo (or rather an older model therof), sort of. It’s slow, but is pretty much a military-grade APC disguised as a limousine (decided to read up on it after asking about it in other thread).

So, replace my scenario with a business exec who’s late for their flight, and the fastest route to the airport is via Circuit de SPA (for some reason).

I agree the limo was a dumb move by turn 10 but so are the trucks and vans and off road vehicles. In my opinion those cars should be horizon only. As far as physics. I feel fm6 tuning had the least amount of impact than any other forza game. I was running fast laps at road America and sebring with a base tune on my A class hellkitty. It does handle like a 4000 lbs car. Yet these cars are a handfull in real life. I know because I drove one and own a scat pack.

That being said. Forza will always be one of my favorite games. When I want to get hardcore simulation I slide in project cars.

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You can’t compare the lap times from the 1930’s to today; the track has changed quite a bit since. Up until 1939, GP cars ran an additional 5 mile section that doesn’t even exist anymore (Sudschliefe). Not to mention turns that have been added/removed/changed and surface changes.

Also, you have to keep in mind that race cars (especially back then) were never a final product. They were constantly being update, rebuilt, and modified as technology improved and to meet various racing guidelines. The W154 actually raced in the Indy 500 well after the war (last entry was 1957, but didn’t qualify) and raced in a couple GP’s in south America in the 1950’s. I’m sure those cars were quite a bit different than what it was in 30’s.

Point is, for cars this old, especially race cars, all you’re going to have is very rough approximations and who knows which setup they are actually approximating.

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came here to say this.

Also keep in mind you aren’t having the physical difficulty that the GP racers of that era had to deal with. Try it again with a Club Sport wheel with some absurd settings. I’m sure fatigue set in quite quickly for those gentlemen

edit: This car ran an indy quali time of 128 mph in the day. why don’t you try comparing that. That would be 70.313 seconds

Mercedes completely dominated F1 in its early years, wining races by margins that are impossible to replicate in modern racing today.

Read some history about that period in racing.Auto Union won 18 races v Mercedes 28 wins.They both dominated thanks to Hitler’s money.