Cherrier Vivace & Tograc

Most modern turbo cars will limit boost, and short shift if automated, in 1st and sometimes up to 2nd or 3rd gear.

If anything, the big question is whether real manufacturers also limit boost in reverse.

On LSDs:
This is the only write-up I've found anywhere that goes into the math.

Note that to get moving, the Cherriers use a slipping clutch rather than a torque converter so the additional torque multiplication is absent.

Also, LSDs will generate heat, but within their friction elements rather than at the brakes as with eDiff systems. Still, definitely better for heat management in FWDs, particularly in track conditions.

Honestly, no big deal as the Tograc isn't meant to be a rock crawler like a Hopper, factory fitted fully locking diffs and a low range box would be very unrealistic.

The Evoque and Renegade AWD instead use a 9-speed auto with a comically short 1st gear. Both also use eDiffs at the front. LSDs/TBDs are only available from the aftermarket.
Of all cars with the GKN Twinster, only certain Focus RS variants have a front TBD fitted. The current A45+ with a similar system may have a front LSD, but the info is a bit vague.

I'll shy away from the specifics, but eDiff logic tends to be present even in LSD fitted cars as high lockup LSDs tend to have undesirable handling side-effects. eDiffs can serve as a supplement or backup solution in the event of insufficient accel lockup, whether by intended design like in Porsches, or when necessary due to wear and tear of the LSD's friction element.

The next question would be finding out which AWD cars IRL have some form of front and/or rear LSD/TBD.
RWD biased AWDs almost always have open fronts, and it's generally the opposite for FWD biased.

Near 50/50 style setups like the Evo/Ralliart and STi use helical fronts which behave similar to open types in severe split-mu conditions.

My personal nitpick with giving any AWD Cherrier factory fitted mechanical or electro-mech-vario LSDs at even 1 of the driven axles is that it makes the platform feel a bit too perfect.

Cherry picking the "best" component from each unique IRL platform and drivetrain configuration should be avoided, it would certainly make it harder for a competitor in the same class to exist in Beam, unless the artistic vision is some weird dystopian monopolistic world.

To a much lesser extent, there's a whiff of this issue in Beam's older content, there are perhaps too many FWD factory configs with LSDs.

The Cherriers actually buck the trend in a more realistic fashion. The only further specialised drivetrain suggestions are adding eDiff logic to the electric versions and a VAQ-style (electro-mech-vario lock) system in the high power FWD versions.

 

The diesel engines should have Stage 1 2 3 ECU just like gasoline engines

 

and a VW roalingcoal ECU

 

Cherrier diesel gate?..

 

I think there's an issue with the differential, at least on the 270S. Even with TCS off, it feels like its ON, try it in a long sweeping corner at say 130-140kph, car wont accelerate. Meanwhile if you swap the Open (??????) for the normal LSD, everything feels fine.

 

I am new to BNG & it looks like I joined just at the right time - I love all versions of the Vivace, even the base model! Really accessible performance - feel like you're doing 60 & you're doing 40! The Tograc qE is arguably the most intriguing - I have set it to my new default spawn. At least setting an elec vehicle to the default means you don't have to turn the engine off as soon as you launch the game...

 

This is because in a Vivace,electronic differential brake is always applied to the less traction(inner) wheel, regardless of driving mode. Since an eDiff is less energy efficient than a mechanical LSD, you may perceive that the car wont accelerate due to lower wheel power at a given engine power when cornering.

 

It's sick as hell, i love it. Beamng really needed a modern Hatchback or SUV, and luckily we got all 3!

 

? What is the problem?

 

you said that we were lucky that we got all three, but there were only 2 lol

 

That's how good the devs are, they're bending reality for our enjoyment

 

This post needs to get staff pick imo

 

QUICK! CHANGE THE TOPIC!

I must admit, I find it kind of strange the way the Vivace S has more body panels in common with the tograc than the normal vivace (mainly the quarterpanels/taillights), but I guess that's the way the baguettes would engineer it.
that being said, I do find it incredible that every single external panel of the car is customisable in some way.

 

I see ! I kinda suspected as much, would not be a bad idea to have it be its own part imo. Call it "Open Electronic Differential" or something. That said, its probably a bit too aggressive then in how it works, just my opinion.

I'd probably also suggest that it wouldnt be a bad idea to have the FWD Sport variants have a LSD as standard, at 270hp+ its not a luxury haha. Heck, you could even give it an electronically-controlled mechanical LSD if you can actually model that, like on a Veloster N for instance.

Cheers for your work !

 

Agree

 

Working on the implementation for these electro-mech vario lock LSDs would be a good idea if more modern performance cars or even certain M-otorsport style expansions to the ETKs are incoming. I imagine that the fine tuning would be a big pain and time sink though, as with the IRL systems.

On the eDiffs, the current effect is a bit too strong at higher speeds. When one wheel is braked, the new difference in speed with the other wheel can cause the eDiff to switch sides and brake the other wheel. This often leads to a sort of rapidly oscillating brake left-right-left-right-... effect as long as power is still applied.

Most IRL eDiff systems will reduce or cease intervention at high speed, even if it means that there could be some cross axle slip.
My current kludge fix halves the brake power in the main eDiff LUA; still very effective while also almost eliminating the oscillations.

Last bit, not a programmer here, but could the eDiff call line be separated from the individual differentials and instead be put in as a DSE subpart or even as a specific line in the drive mode settings? Would it still be able to appropriately seek out each unique "differential" type part to take effect on?
Like how the brakes and ABS interface.

The idea is that it could allow for car-specific implementations:

• A certain old FWD car without TCS treats eDiffs like differential locks; off by default.
• In a specific old RWD car, eDiffs are only active when TCS is on.

 

To solve the problem, the Devs need to tune the eDiff so that the g-Sensor is taken into account. When the vehicle is above certain speeds, never brake the left wheel(s) on right-hand turns and vice-versa.