Dual-clutch automated manual transmissions: PDK [1280 x 782] imgur.com/VSjz119
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πŸ“°︎ r/MachinePorn
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πŸ‘€︎ u/Diastro
πŸ“…︎ Aug 12 2013
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Need a basic explanation for automated manual transmissions (DSG)

I know what the DSG is and how it works, but I find it difficult to explain to friends who are less in to cars. They don’t seem to see the difference between an automated manual and a normal automatic. They think that if it does the shifting for you, what’s the difference? My wife wonders why I’m going out of my way to get an automated manual when β€œlots of other cars have paddle shifters”, not understanding that the paddle shifters in an accord/altima/optima are not the same. Does anyone have a good explanation of the differences and why DSG is better (or worse)?

Separately, do all automated manuals have a dual clutch? I find myself bragging about faster shifts and rev matching as a characteristic of the DSG, when in reality it’s the dual clutch that gives us those perks.

Maybe my own understanding is more surface level than I realize, so some tech specs would also be appreciated.

Edit: I know how the dual clutch works with gear preselection , etc. I'm more trying to provide a simple explanation of why there is a difference between a true triptronic/DSG/AMT when you push the paddle between when you push it on a normal automatic.

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πŸ“°︎ r/Volkswagen
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πŸ‘€︎ u/MrNoodleIncident
πŸ“…︎ Jun 05 2015
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Non-Automated cars are going to be the "manual transmission" of the next generation.
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πŸ“°︎ r/Showerthoughts
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πŸ‘€︎ u/PeacefullyInsane
πŸ“…︎ Oct 23 2015
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Maruti Suzuki Sells Over 50,000 Cars With Automated Manual Transmission (AMT) Technology - Overdrive overdrive.in/news/maruti-…
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πŸ“°︎ r/india
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πŸ‘€︎ u/innovator116
πŸ“…︎ Sep 25 2015
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Why do manual and automatic transmissions use such wildly different gearing mechanisms?

I have been watching a bunch of videos on different transmission designs recently, and I am stuck on a seemingly straightforward question. Manual transmissions and automatic transmissions are designed very differently, with the latter using planetary gears and torque converter. My question is: why did automatics switch to this completely different gearing mechanism, vs. just automating the shifts in a manual transmission?

I am aware that clutchless and automated manual transmissions exist, but I am not aware of why the conventional automatic transmission design was adopted instead of them. Is this purely historical? (If so, what happened?) If not, what engineering advantages does a conventional automatic offer over an automated manual transmission? (The wikipedia page on automatic and automated manual transmissions did not give me a clear answer.)

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πŸ“°︎ r/askscience
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πŸ‘€︎ u/fathan
πŸ“…︎ Mar 08 2021
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What failures could have led to this bus crash?

So I just watched this news report on a local bus that crashed.

Essentially in a nutshell, the buss was parked and running, and turning the bus off caused it to roll backwards down a hill.

Now to me, as a truck driver, I'm used to safety systems on heavy vehicles being "Fail-Safe" not "Fail-Deadly", if you lose air, brakes lock on, if it's an Automated Manual Transmission, it will lock in low gear and the compression will hold it. In fact our latest fleet had one of the trucks fail by getting turned off in gear and the Automated Manual Transmission locked itself to a position where they had to remove propshafts and cage the brakes.

So what system here has failed, and why is it designed to fail deadly?

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πŸ“°︎ r/AskMechanics
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πŸ‘€︎ u/Rumbuck_274
πŸ“…︎ Jan 04 2021
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Inside the Spark: Continuously Variable Transmission: It's All About the Fluid

TL; DR

  1. Both Gen 1 2014-2015 and Gen 2 2016+ Chevy Spark models have a variant of Jatco JF015E.
  2. Originally 2014 Sparks came with transmission software that was always shifting to the low gear, causing shocks, resulting in premature belt and pulley metal wear. An update was issued for CVT firmware to prefer staying in high gear on deceleration (PI1309). 2015+ Sparks are coming with this update preinstalled. This is now a normal behavior and can't be changed.
  3. CVTs on all 2014+ Spark models are not sealed. They are serviceable and you should perform the maintenance at least every 45K miles unless you drive on the highway all the time.
  4. CVT performance is heavily influenced by the state of the fluid inside. Deteriorated fluid will cause the belt to slip producing shudder. No, this shudder won’t disappear on its own, it will only get worse.
  5. Shudder is different from slow smooth acceleration, which is a feature of this transmission.
  6. Fluid is not the only thing that can go wrong, so contact your dealer if you have transmission concerns. If you are driving a 2014 model and did not get the CVT TCM update at the dealer, the chances of transmission damage increase, so there is a campaign for 2014-2015 model year vehicles to replace damaged transmissions.

Background

The main task of transmission is to adapt the output of the engine to the drive wheels. In order to provide more torque to the wheels, transmission makes the output rotate slower resulting in more torque. If you need higher speed, transmission makes the output rotate faster with reduced torque. Transmission also deals with the reverse gear because engines always rotate in one direction.

Starting from 2014, Chevrolet ships Sparks with three kinds of transmissions:

  • A manual one where the operator has full control over the timing of switching the gears, effectively changing the ratio of the wheel to engine rotations.
  • A Continuously Variable Transmission, where the gears are replaced with a system of a push belt and pulleys, this post is about the CVT.

Side note: In 2016 Opel Karl also gained AMT - Automated Manual Transmission called Easytronic 3.0 in European and South Korean markets - https://www.carscoops.com/2016/03/opel-adds-affordable-easytronic-30/.

Imagine a bicycle with multiple gears. Your gear at the rear wheel allows you to change how much of your inp

... keep reading on reddit ➑

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πŸ“°︎ r/chevyspark
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πŸ‘€︎ u/ryep
πŸ“…︎ Jul 30 2020
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Protip: If you're looking for realism, look up actual trucks for sale in the model you want to by in game

Real truckers and companies are constantly selling their trucks online. Websites like TruckPapers feature engine manufacturers, transmission types, wheelbase, horsepower and more on their listings. When I was looking to buy an Anthem in game, I went to TruckPapers to see what horsepower was most common for a Mack. 505 existed, but there were tons 445 hp engines. I'm also not a truck guy in real life so I didn't realize most Macks use the mDrive Automated Manual transmission rather than the manual Eaton or Automatic Allison. This lead me down the rabbit hole on the differences and applications of each. I love learning!

So basically finding real listings is a great way to see what engineer sizes make the most sense, especially if you're using Workshop custom engines or custom trucks like the k100e or w990 for example.

Obviously this isn't a thing for everyone as some want the biggest engine with the highest gears and an automatic transmission, but it really puts the "sim" in Simulator.

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πŸ“°︎ r/trucksim
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πŸ‘€︎ u/Truckernaut
πŸ“…︎ Jun 04 2020
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Questions about transmissions in ATS & ETS2

ATS question:

I was dicking around with using real automatic rather than manual in the settings and I've noticed in my Peterbilt that depending on the transmission I choose, the gears will either display as (for example) A4, 4, and 4H.

I know that when the gear display is 4H, that's a traditional manual transmission that the game is operating automatically due to the "Real Automatic" option I have on. But what's with the "A" in front of the gear? Is that mean I chose an Automatic or Automated Manual transmission? What about when it's just a number by itself? Like just "4" being displayed?

I'm just a bit confused on what transmissions are Automated Manuals vs Manuals vs Automatic. I know the difference between each, but I don't know which one is which in the game and how the game displays them when using the "Real Automatic" option.

Any guidance would be great. I'm trying to set up a 579 with Automated Manual transmission, hence why I'm playing with "Real Automatic" on.

ETS2 question:

Are all transmissions in ETS2 Automatic? Do they use Automated Manual in Europe?

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πŸ“°︎ r/trucksim
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πŸ‘€︎ u/Truckernaut
πŸ“…︎ Jun 14 2020
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Consumer Reports' Boxster review (their best-rated sports car, 88%)(wall of text)

Highs

  • Unmatched handling agility
  • Potent power and invigorating sound
  • Quick top operation up to 43 mph
  • Premium interior appointments
  • Two trunks aid practicality

Lows

  • Steep price for a limited-use two-seat convertible
  • Very firm ride and loud cabin
  • Getting in and out requires agility
  • Little cabin storage and lousy cup holders

Although the Boxster initially rode on the coattails of the legendary 911 when it debuted two decades ago, Porsche's roadster has since become an icon in its own right. For 2017, Porsche added 718 to its name as a nod to its motorsports pedigree, but otherwise this is still the same recognizable two-seater roadster the Boxster has always been. Significantly, the latest-generation Boxster loses two cylinders yet gains 35 horsepower. Has the magic, embodied by its fantastic handling, sound, and feel, been diluted?

We found the answer to this question to be mixed. While the new car gains in terms of measurable performance and fuel economy parameters, and it retains its spectacular handling agility, immediate responses, easy top operation, and premium cabin ambience, the car's power delivery and sound characteristics have been somewhat adulterated in the transition.

Any concern that a four-cylinder may not broadcast the right bravado is instantly erased, as the mid-mounted engine hums and barks just behind you. Acceleration is brisk; we measured a 0-60 mph time of just 4.4 seconds with our 300-hp base model. But in everyday driving, there's typically a slight delay before the rich torque supplies a big rush. Engage Sport mode, and the car changes its demeanor, sounding as if it is eager for a track day, complete with hearty exhaust "blats" on downshifts.

We opted for the PDK automated manual transmission to reflect most customers' preference. Despite trepidations, this transmission has won favor among us thanks to its swift, punctuated, and direct shifts. Buyers who want a traditional manual, complete with a clutch pedal, can still get one.

Handling is pinpoint accurate and seemingly telepathic. The car seems to execute your cornering line as you outline it in your head. It stays flat and turns in immediately yet never feels nervous. Those traits carry over to the track as well where the 718 demonstrates tenacious grip and a balanced behavior. Few cars can rival the Boxster's agility, driver confidence it inspires, or the grin it puts on your face.

Being a through-and-through sports car, no one expects a plush

... keep reading on reddit ➑

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πŸ“°︎ r/Porsche
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πŸ‘€︎ u/TomaVanPey
πŸ“…︎ Mar 24 2020
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2015 Ford Fiesta automatic transmission with 55k got a new clutch under warranty

I just wanted to get this indexed in the interwebs. We bought a 2015 Ford Fiesta (automatic) with 53k miles on it. I test drove a couple of them and noticed some shuddering in the transmission of one and passed on it because of that. I did not feel that occurring in the one we ended up buying. It felt like a clutch slipping in a manual transmission. But this is an automatic, so that didn't make a lot of sense. After a couple thousand miles ours started doing the same thing.

I didn't realize at the time that the transmission in the Fiesta is more of an automated manual transmission than a traditional automatic transmission with a torque converter. In any case the 5/60 warranty covered a $1500 bill to replace the clutch.

edit: a good article on the Fiesta dual-clutch transmission: https://motorreview.com/ford-fiesta-automatic-transmission-fixes/

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πŸ“°︎ r/Ford
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πŸ‘€︎ u/var23
πŸ“…︎ Jan 02 2019
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Do you think we will start seeing electrically assisted turbos?

Formula One cars are pretty complicated. They are hybrid and use a 1.6 liter V6 engine with an electrically assisted turbocharger. The hybrid system uses a 160 HP electric motor with regenerative braking. The turbocharger is still powered by engine exhaust, but it is also connected to an electric motor, which can spool the turbo to eliminate lag, and slow it down, acting as a wastegate. The electric motor has complete control over the speed (and boost pressure) of the turbocharger. When the motor is slowing the turbo, it recovers energy and charges the hybrid battery (or capacitor bank). It works the same way that regenerative braking does. The cars use 8 speed dual clutch transmissions. They also use brake-by-wire. The brake pedal is still connected to a master cylinder and to the calipers, but there is a module in-between that can continuously vary the pressure sent to each caliper. The pedal acts as a request, not a demand, which works well with the regenerative braking of the hybrid system.

Regular cars have had all of this technology in the past, except for the electrically assisted turbos. Hybrids and regenerative braking have been around since the 1990s with the Toyota Prius and Honda Insight. Brake-by-Wire was used on older Mercedes, known as Sensonic Brake Control, and is currently used on the new Acura NSX. Dual cluch transmissions have been in regular cars since the 2003 Audi TT and Volkswagen Golf R32. Single clutch automated manual transmissions were used in Formula One in the past, and have been in road cars for a long time as well. It is also believed that some teams use HCCI ignition, which is what Mazda will be using on there future Skyactiv engines.

Electrically assisted turbos are still rather new, but it combines two technologies that have been around a very long time. Do you think we will ever start getting electrically assisted turbos, or do you think that is technology that won't leave Formula One?

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πŸ“°︎ r/cars
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πŸ‘€︎ u/nukelauncher95
πŸ“…︎ Aug 27 2017
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How does a dual clutch (DCT) or sequential manual (SMG) idle in gear?

I understand how a conventional automatic transmission allows a car to idle while in "D", but how does this work with the newer automated manual transmissions?

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πŸ“°︎ r/cars
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πŸ‘€︎ u/plug_adapter
πŸ“…︎ Aug 17 2014
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My first time driving an Aston Martin

Video Link: https://www.youtube.com/watch?v=8JGZzsz6kbk

Pics: http://imgur.com/a/Iy5W3

Yesterday, I had the opportunity to drive a bunch of awesome cars, one of which was the 420 hp Aston Martin V8 Vantage N420 Coupe. These were a special edition model with extra design touches, a sports suspension, and sports exhaust to differentiate from the standard V8 Vantage models.

This particular car is a 2011 model with only 23k miles and is for sale up at Performance Auto Gallery in Gaithersburg, MD (link: http://www.performanceautogallery.com/vehicle-details/2011-aston-martin-vantage-n420-coupe-5e2803611e43482d9d1f0a36d428560b/). This happens to be the same place where I bought my ultra-low 16k mile 2004 Subaru WRX STi (video link: https://www.youtube.com/watch?v=FDt-v0FBH98).

I've always wanted to drive an Aston Martin, especially the Vantage since it's the smallest and most nimble of all the Astons. There's definitely a sense of occasion walking up to the car because it's drop dead gorgeous, especially decked-out in black with carbon fiber accents on the side and rear diffuser. The engine fires up with a loud bark and eventually settles down to a subdued rumble that hints at the driving experience to come.

Aside from the exterior and interior styling, the best part, by far, is the noise. I can only think of one other car (Jaguar F-Type R) that sounded better and just by a nose. Both cars are surprisingly loud when you really dip into the throttle, but can be reserved for when you're pulling up to the country club (which we did for fun).

The main downside is the automated manual transmission which is slow and clunky at low speeds, similar to what you'd expect in an SMG E46 M3 or an E60 M5, but it does gets better the harder and faster you drive. While it's not the fastest or best handling car you can get for the money (these things cost about $130k when new, depending on options), it's certainly a very emotive car that put a smile on my face throughout the drive.

It's also an incredible value and you can get them for about 50% of the original price, which is pretty crazy. These cars are also relatively reliable and not to bad on the wallet so long as you're on top of regular maintenance. If I had an extra $65k laying around, I'd have a hard time deciding between this and a used 997 911 Carrera S. Of course, the one to have is the 6-speed manual, but if you're in traffic this wouldn't be a bad option.

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πŸ“°︎ r/cars
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πŸ‘€︎ u/ThatCarPodcast
πŸ“…︎ Apr 17 2017
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latest gen corolla CVT reliability?

So I'm currently on the look out for a new car. I've been looking at the Corolla's as I just want a reliable car going forward. Currently own a 2003 Acura TL which has been great for the most part. The transmission is a known point of failure but at 200k KM it's still going strong. We also own a 2012 Ford Focus with the dreaded Automated manual transmission. I just cant stand the thing and that's the reason I'm here asking about the CVT in the newer corolla's. I'm just done with owning un-reliable major parts and wanted to see what everyone here thought about them.

I understand the pick up and torque off the line won't be great but I'm OK with that. I'm just mostly concerned about having a reliable car I won't have to stress about anymore!

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πŸ“°︎ r/Toyota
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πŸ‘€︎ u/ellisdlsd
πŸ“…︎ Oct 11 2016
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2012 F-150 Stuck in 2nd Gear

I was at a stop light yesterday and began to accelerate towards the intersection when I felt a loss of power. The engine revved loudly and the RPM's climbed higher, but the truck would not move past second gear. I threw it into the automated manual transmission gear, and I attempted to drive home, but even when I "manually shifted" from 2nd to 3rd, the display for the gears would only flash on 2 and I could not get the truck into 3rd gear. I have about 65,000 miles on the truck and it is a 3.7L V6 for reference. I have never had this issue with this truck and I've only been able to find limited information in online forums regarding transmission shudder when accelerating from a complete stop. Has anyone else experienced this issue or know what may have caused it? I was able to drive it to work this morning without issue, but it felt that there was a rough shift from 1st to 2nd.

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πŸ“°︎ r/Ford
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πŸ‘€︎ u/wireguy17
πŸ“…︎ Sep 09 2015
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Alternative to a 2013 Ford Fiesta?

I test drove a 2013 Ford Fiesta with 14,000 miles. I was really impressed with the car. For such a cheap vehicle it felt so premium, at least to me. I tested the automated manual transmission, which is apparently legendary for having horrible issues, as I learned later while researching it. Problem is I liked the car so much--I felt it was a huge upgrade from my Kia Spectra while not being all that expensive. However, I do all my own maintenance and I plan on keeping the car for a very long time so I don't want a problem I can't fix nor do I want something that I'll have to worry about. Is there a car that feels like the Ford Fiesta and is around the same price but with issues not so drastic as a horrid transmission setup? Does anybody know if the manual transmission has the same issue? I would prefer a manual, anyways.

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πŸ‘€︎ u/IAMA_Duke
πŸ“…︎ Jun 28 2016
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Help wanted: Newish transmission and tyre options

After a long break, I recently got back into ETS2. I bought most of the DLCs and immediately noticed I now have access to:

  1. two different clutch-based automated manual transmissions as well an Allison, which I understand is a torque-converter automatic transmission; and

  2. many different Michelin tyre and wheel options, with different sizes and stats, and different options for front and rear wheels.

Would any of you kind and knowledgeable redditors be interested in explaining:

  1. whether the difference between clutch-based automated manual transmissions and the torque-converter automatic transmission is actually modelled, what the stats precisely mean (basic ratio I get, but differential in this context is a complete mystery to me, and neither am I sure what the Allison torque multiplier implies), and finally what the optimal usages for these transmissions are in-game; and

  2. whether all of the tyre stat effects are actually modelled, what the stats precisely mean (decibels I get, but the two alphabetical stats are more of a mystery, and I don't know how tyre sizes affect various performance metrics), whether it's a good idea to put different tyre and wheel types or even sizes on rear and front, and finally what the optimal wheel and tyre usages are in-game.

Edit: β€˜modelled’ rather than β€˜implemented’

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πŸ“°︎ r/trucksim
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πŸ‘€︎ u/ksundstrom
πŸ“…︎ Apr 30 2017
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Regretfully need to sell my 2014 TDI Jetta. Reddit gets first dibs... [PA]

Not sure if this is allowed here, but i'll give it a try......So I just got a new job where I will be traveling out of state all week. With that being said, I will have little to no time to drive my car besides trips back and forth to the airport... It's a 2014 VW Jetta TDI with all the bells and whistles that I bought brand new from Autohaus in Lancaster, PA. It has 48k miles on it and is in excellent shape. I have not had a single issue with the car since I bought it.. All services were handled at certified VW dealerships and are up to date. It's black on black leather with the automate manual transmission... I don't think I need to get into much detail on here. Most of you know the stats of this car... I am not trying to make money off of this car.. I am trying to save money by not having this extra car payment. I would sell it for what I owe on it which is around $15k. Since the goodwill package is not transferable, I will use it to buy some new tires, since the ones on it will need replaced in the near future.. I am located in Pittsburgh, PA. I will post pictures after I have the car detailed. Message me if you're interested. CRAIGSLIST POSTING

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πŸ“°︎ r/Volkswagen
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πŸ‘€︎ u/yolorelli
πŸ“…︎ Jan 21 2016
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Opinion: 2022 Voting System

I think we should change our voting system to a hybrid one where votes are casted manually but transmitted electronically/digitally, so there's a small chance that the result will be tapped/altered since the transmitted result and receipts will be affirmed (valited or confirmed, whichever you prefer) by each precinct if it's the correct numbers.

Vote counting can be done by having a representative from each parties to validate the integrity of the vote. Each precinct will be guarded by policemen and armies (from neighboring precincts) to lessen the likelihood of threats from powerful politicians/families.

As for the speed of the result, it would only take 3-5 hours (less than a day) per precinct to tally the votes. If done simultaneously, result will be finalized in 1-3 days including validation of receipts.

For me, it is better to have a transparent result over speed (automated).

That's my take. If you see any disadvantages with this system, or have any other better system, please comment below and I appreciate it.

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πŸ“°︎ r/Philippines
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πŸ‘€︎ u/-FAnonyMOUS
πŸ“…︎ Feb 23 2021
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Alfa Romeo 8C Spider - In Depth

Season 124’s PC car is the Alfa Romeo 8C Spider. This car was introduced in June 2020 as the milestone reward for season 108. Although stage 6s and fusions will be more difficult to obtain than for other makes/models, an event using the milestone car did allow many to collect crates for this prior to the PC. The current fastest time for the 8C Spider is 10.293 (dyno of 10.576) placing it in the top third of tier 4 cars. Beating dyno by nearly .3 seconds this is an excellent Tier 4 for live racing and can also perform well for Tempest challenges.

Anonima Lombarda Fabbrica Automobili (ALFA) was founded June 24th 1910. Anonima means anonymous, and at the time was a legal form of company if created by unnamed investors. The first car (the 24 HP) was produced the same year and ALFA entered the racing scene in 1911. In 1915, the company came under the leadership of investor Nicola Romeo, and was renamed in 1920 to Alfa Romeo. That same year, the Torpedo 20-30 HP was the first car to carry the Alfa Romeo brand. In 1921 the backing bank (Banca Italiana di Sconto) went bankrupt and the government propped up Alfa Romeo to keep it from folding. After more struggles and breaking off of branches, Nicola Romeo left in 1928. Following the second World War, the company struggled to regain profitable margins and switched to mass production of more affordable vehicles, abandoning the hand-built luxury models that brought its first successes. In 1954 the Alfa Romeo Twin Cam engine was developed and had a 40 year production run, ending in 1994. In 1986 Fiat purchased all of Alfa Romeo and merged it with Lancia into the Alfa Lancia Industriale S.p.A. Models produced after this combined many Fiat body styles and parts but retained Alfa Romeo engines.

The Alfa Romeo 8C Competizione was first unveiled at the Frankfurt Motor Show in 2003. This was a concept car with a 3.0 litre prototype engine and no drive train. In 2005 the 8C Spider was debuted at the Pebble Beach Concours d’Elegance as a roaster version of the 2003 concept 8C. Production was confirmed in September of 2007 and the production variant unveiled at the 2008 Geneva Motor Show. Production began in 2009 with a total of 500 produced. Of those 500, 35 were exported to the US.

The 8C Spider is powered by the same 4.7 litre V8 as the 8C Competizione, which produces 444 hp and 354 ft-lbs of torque. The car accelerates from 0-100km/h in 4.2 seconds and tops out at 180 mph (290 km/h) which is just slig

... keep reading on reddit ➑

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πŸ“°︎ r/CSRRacing2
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πŸ‘€︎ u/Glycereine
πŸ“…︎ Mar 25 2021
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