User Tag List

First 9171819202129 Last

Results 181 to 190 of 446

Thread: The Car Thread

  1. #181
    Senior Member Winds of Thor's Avatar
    Join Date
    Jan 2009
    MBTI
    ENTP
    Enneagram
    3w4 sx/so
    Posts
    1,859

    Default

    Quote Originally Posted by sprinkles View Post
    Haha that's funny.

    Here's some Lancia Delta S4's in action. Personally, I think they are just fine, just needed a little better track safety is all.
    Whoops! Yea.. Got a little too loose in the corner maybe?
    "..And the eight and final rule: If this is your first time at Fight Club, you have to fight."
    'Men are meant to be with women. The rest is perversion and mental illness.'

  2. #182
    Mojibake sprinkles's Avatar
    Join Date
    Jul 2012
    MBTI
    INFJ
    Posts
    2,968

    Default

    Quote Originally Posted by Craic View Post
    Whoops! Yea.. Got a little too loose in the corner maybe?
    Probably.

    When these cars were invented, traction control and stuff hadn't evolved so much, which is part of what made Group B dangerous. With better braking and traction some of the Group A cars get better times, but only because they were allowed to stay around and evolve.

    Group B was only around for a few years and really didn't get a chance to iron itself out unfortunately. I think they would have developed safety for it if given time.

  3. #183
    Tempbanned
    Join Date
    Apr 2009
    Enneagram
    8w9
    Posts
    14,031

    Default

    JOY OF MACHINE: THE CARS OF SPA



    I cannot think of a motorsport event more fascinating than a twenty four hour race stuffed to the brim with GT cars. While spec racing can be entertaining, particularly fair for the drivers, I find it far more fun to see your favorite marquees battling it out for hours. At the Total 24 hours of Spa there was an unprecedented sixty six cars, all of which were GTs, entered in the race. Let’s have a closer look, shall we?


    The cars are finely tuned instruments designed for all-out track domination but they do, more often than not, bear a striking resemblance to the base model car. These are of course primarily flagship sports cars from the world’s greatest manufacturers which have been made into even more extreme racing versions. What’s not to like?


    The thing that always astonishes me about GT cars is that they come from such wildly varying backgrounds, yet they are restricted by the governing bodies to perform nearly identically. In racing terms we call this “the balance of performance” which is essentially a very detailed handicapping system put in place to make all the cars more or less even. Items like weight, tire size, brake rotors, throttle restrictors, fuel capacity and much more are analyzed prior to the start of the season.


    Based upon the findings, teams are then mandated to make certain changes to their vehicles in order to level the playing field. While there is some occasional sand-bagging, this typically results in shockingly close racing, often with the leaders closer on the final lap of a 24h race than after the first lap of a spec series. So without further ado, let’s take a look at many different solutions to the same problem: building a fast and reliable GT car.


    While the Mercedes SLS is a stunning machine on the street, I find it quite the oddball as a GT3 car. Not only does it have an FR layout, in itself a little less common in this world, but it also has an extremely long front end which is rumored to be difficult to get used to driving. Just look at how much carbon ducting is required to get air from the air boxes at the front of the engine bay to the throttle bodies of the 6.3L V8 at the back!


    The BMW Z4 is another FR machine which has been homologated for FIA GT3 with an engine swap derived from an E92 M3. This engine has of course been modified and is now a 4.3L up .3L in displacement and stuffed with racing internals providing a compression bump to 13:1.


    Here we see the beast that lies beneath all that carbon shrouding with the eight individual throttles finely tuned for ultimate response. BMW say the car is good for 515bhp from the factory, certainly not a bad place from which to start.


    This year McLaren have really increased their presence with what is arguably the hottest new customer racing car with nine examples entered in the race. The MP4-12C GT3 uses a more traditional MR layout with it’s howling twin-turbo charged 3.8L V8 exhausting straight through the center-line of the car, often resulting in some pretty epic fireballs.


    Ferrari have also stuck to their MR roots with their latest GT3 incarnation, the 458 Italia. Like the McLaren, Ferrari have also chosen a V8 engine but their 4.5L design is free of any forced induction. Despite lackluster engine appearance, Ferraris are usually one of the faster cars on track. With fourteen participating at this year’s race it was by far and away the most popular choice and it was not at all unusual to see them out in packs.


    Regardless of layout, at the opposite side of the car from the engine compartment typically lies the rest of “the stuff”. Here we see the front of a McLaren containing coolers for oil and water, along with ducting for the brakes and cockpit, a pair of air jacks and some hydraulic tanks.


    The front of a Porsche 911 is a common site regardless of what GT race you attend anywhere in the world. Space underneath the GT3 Cup’s hood is primarily occupied by the trademark front mounted fuel cell.


    Cockpits in the GT3 field are also quite varied since there is no spec tub like you have in DTM for example. This means the inside of the car is simply a reworked factory design and many times certain panels and pieces remain from the standard vehicle to remind onlookers of the car’s street pedigree. None, in my opinion, do this better than the McLaren which has a shockingly accurate dashboard left inside.


    By comparison the Z4 seems like a super raw track day special, but I can assure you everything here is top notch. All of the safety equipment is inspected prior to the race and certification decals are then applied to certain components like the drivers helmet or the car’s roll cage, as seen here.


    In terms of interior I again think the oddball of the bunch has to be the Merc with it’s unconventional gullwing doors I can only imagine the joy of prepping this cabin. In fact, in the event of a roll over, there is a switch in the cockpit that upon use causes the door hinges to literally explode off the car allowing the driver to make a clean getaway.


    Of course aerodynamics also play a large roll in the performance of these cars, particularly on a high speed circuit like Spa. Here we see a dry carbon honeycomb front splitter from an Audi R8 LMS Ultra… I can’t even fathom how much this piece costs to replace, certainly more than my entire Civic.


    Here’s a look at the underside of the same splitter. Now we can begin to see where the magic really happens as the grooves and recessions are all expertly formed to allow the car to suck down towards the pavement. On the right side you can see some of the wooden plank being worn down, likely at Eau Rouge…


    Where the splitters were visibly set on fire for a brief moment under maximum compression from the g-load of the entry. These pieces of wood do serve a purpose other than a smoke show, they are actually measured in scruteneering after the race and must meet a certain thickness requirement. Drive too hard, over too many curbs for too long and you won’t pass inspection.


    Another obvious piece of the aerodynamic puzzle is the rear wing, often imitated on street cars but virtually never fully duplicated. While the airfoil shape of the wing usually gets all the glory, the real unsung hero are the mounts; without which the forces created by the spoiler would go to waste. Here we see the adjustment range on a Pro-Am Ferrari 430.


    On the Mercedes adjustments are done via the top portion of the mounts in a more traditional manner. Not the additional adjustments fore/aft from the triangulated tension rod setup. Pretty trick stuff indeed.


    Ironically the most incredible force these cars will endure is the one least talked about – braking. These cars are certainly capable of some impressive acceleration and lateral g-loads, but the braking trumps these by a substantial margin. In order to keep things running smoothly over the course of a 24h race, high tech components must be used.


    Rotor thickness and diameter is the largest contributing factor in how hard and how long you can brake for. Since the rotor alone is responsible for absorbing and dissipating the heat generated under the energy transfer, there is a lot riding on this seemingly simple component. The floating iron discs seen here on the McLaren is 378mm in diameter and 36mm in width.


    While it is true that the front brakes do a majority of the work, the rear brakes on GT3 cars are no slouches either. Here we see massive rotors combined with Brembo 4-pot calipers and custom Endless pads on an Audi R8 LMS Ultra. In the last few years Endless have become one of the premier pads in endurance racing and have found the top step of the podium at both Nürburgring and Spa in 2011 and 2012!


    With technology advancing in every direction it’s easy to overlook the basics, but at the end of the day it’s still some of the simplest components that have the greatest effect on a cars performance. Case in point, alignment.


    Toe is unquestionably the largest factor in the handling of any vehicle, which is precisely why it’s adjustable on both your mom’s minivan and every racing car on the planet. Other factors like camber, caster, scrub radius and ackerman also come into play and in the racing world keeping a car aligned properly is key.


    This is why over the course of a weekend you will see times aligning and corner balancing cars time and time again. But they won’t be using laser alignment machines, they’ll be using strings and pendulums. This is because, unlike computers and lasers, gravity never lies. Sometimes the most simple solution is the best – if it ain’t broke, don’t fix it.


    This pretty well concludes my findings, or at least the end of my still-jet-lagged-from-Spa-brainpower. I hope this has given you guys some more insight into what’s really going on beneath the skin of these monsters and hopefully the next time you see them racing you’ll consider a few of the things I’ve discussed. As always I encourage questions and comments and will do my best to further explain any areas that spark interest. Now I’m off to Mid-O!

    More stories from Sean Klingelhoefer on Speedhunters

    More from 24 hours of Spa on Speedhunters

    - Sean

  4. #184
    Senior Member
    Join Date
    Jun 2008
    MBTI
    INFJ
    Enneagram
    5w4
    Posts
    310

    Default

    Team Hot Wheels - The Yellow Driver's World Record Jump


    http://www.youtube.com/watch?v=7SjX7A_FR6g

  5. #185
    Senior Member
    Join Date
    Jun 2008
    MBTI
    INFJ
    Enneagram
    5w4
    Posts
    310

    Default

    The 1957 Chevy Corvette is another favorite I like because of the engine. The Chevy 283 V8 was a great engine. It was Chevy's first engine to make one horsepower per cubic inch. 283 HP from the mechanical fuel injection was impressive back then.

    It's rare to find a car this old with such low original miles. This 57' Corvette is a true gem. >

    http://mecum.com/auctions/lot_detail...D=FL0109-77469

  6. #186
    Mojibake sprinkles's Avatar
    Join Date
    Jul 2012
    MBTI
    INFJ
    Posts
    2,968

    Default

    Lancia Delta S4 Stradale. This is the full road going version that people could actually buy.
    As you can see it is still essentially the rally car in heavier road trim. If you changed a couple parts it's a devil of a car.


    I'd like to see one of these in full road trim running, but these guys drove it very gently. It's no wonder because a factory Stradale is quite rare.

    Edit: also I love how it looks like a little Chevette Scooter or something but is really pretty much an engine with seats attached to it and some body panels hung over the top.

  7. #187
    Senior Member Rex's Avatar
    Join Date
    Jul 2010
    MBTI
    INTJ
    Posts
    609

    Default

    I see we are talking Group B vs Group A/WRC


    I took the trouble to find out more about this.

    Slowest stage Finnland: Year: 1987

    SS34 Valkeakoski 3.06 km Kankkunen, Juha 2:08 86.06 km/h

    Year: 1986
    SS12 Valkeakoski 3.20 km Grundel, Karl 2:06 91.43 km/h

    Thats actually very good for the 1987 car.


    Random stage
    2011
    SS3 Laajavuori 1 4.19 km Loeb, Sebastien 2:37,3 95.89 km/h

    1985
    SS1 Laajavuori 4.28 km Salonen, Timo 2:40 96.30 km/h






    Acropolis 1986
    slowest stage

    SS40 Pendagi 10.85 km Kankkunen, Juha 10:55 59.63 km/h

    Acropolis 1987
    SS22 Pendagi 1 10.80 km Biasion, Massimo 11:15 57.60 km/h

    Thats gravel right?

    Tarmac

    Monte Carlo
    Random stage

    1977
    S19 Col de la Madone - Peille 1 18.00 km Munari, Sandro 15:39 69.01 km/h

    1983
    SS22 Col de la Madone 1 18.00 km Rohrl, Walter 15:07 71.44 km/h

    1984
    SS21 Col de la Madone 1 18.00 km Bettega, Attilio 14:56 72.32 km/h


    1986
    SS26 Col de la Madone 1 18.00 km Salonen, Timo 13:33 79.70 km/h

    1987
    SS22 Col de la Madone 18.11 km Kankkunen, Juha 18:03 60.20 km/h

    1988
    SS18 Col de la Madone 1 18.00 km Ballet, Jean-Pierre 14:54 72.48 km/h

    1989
    SS15 Col de la Madone 1 18.38 km Biasion, Massimo 13:35 81.19 km/h

    1991
    SS22 Col de la Madone 1 18.46 km Delecour, Francois 15:29 71.53 km/h


    Source: http://www.juwra.com/
    Epic derailment:
    wierd memory work->Tamagochi->tetris->Starcraft2->thugs->Chess->german techno->Love parade->disaster->death..
    http://www.youtube.com/watch?v=Q1wH2...eature=related

  8. #188
    Mojibake sprinkles's Avatar
    Join Date
    Jul 2012
    MBTI
    INFJ
    Posts
    2,968

    Default

    @MatsNorway

    Interesting stats, and I think they show a trend, that rallying isn't about how fast you can go but how quickly you can go.

    What I mean is that it's more about what the car can do in a given section of track. It doesn't matter if you can or can't go 200mph if you never have room to do it - what they had to worry about is how much distance is required to accelerate and decelerate, and cornering matters a lot. A car that doesn't lose as much speed or that can take a different line and get on the gas early can still some times get somewhere just as quickly or even quicker than a more powerful car.

    But, they aren't as fun to watch.

  9. #189
    Senior Member Rex's Avatar
    Join Date
    Jul 2010
    MBTI
    INTJ
    Posts
    609

    Default

    Handling sure make up for a lot of time.

    Even tho the Lancia Delta HF intergrale had 4WD and turbo with probably 280hp at that time. (265hp in 1987) It still got beaten on that stage by a FWD 205 GTI 1.9


    1988 SS18 Col de la Madone 1 18.00 km Ballet, Jean-Pierre 14:54 72.48 km/h"

    Worth mentioning is that the peugeot only won that one stage. the rest was Lancia and others.

    And it was a minute behind the 205 T16 E2 from 1986.

    1986
    SS26 Col de la Madone 1 18.00 km Salonen, Timo 13:33 79.70 km/h

    It certanly was not the first year after group B got banned that they got back up on speed.
    Epic derailment:
    wierd memory work->Tamagochi->tetris->Starcraft2->thugs->Chess->german techno->Love parade->disaster->death..
    http://www.youtube.com/watch?v=Q1wH2...eature=related

  10. #190
    Senior Member Rex's Avatar
    Join Date
    Jul 2010
    MBTI
    INTJ
    Posts
    609

    Default

    1986
    SS23 Col de Turini 2 22.00 km Salonen, Timo 19:29 67.75 km/h

    1991
    SS19 Col de Turini 2 22.21 km Delecour, Francois 15:42 84.88 km/h

    hmm.. I just noticed that the stages from old had only the first two digits of km filled inn. Later they became more accurate. or made the stages more random length.

    I have updated first post.

    For a better comparison i think a gravel road might be better.
    Epic derailment:
    wierd memory work->Tamagochi->tetris->Starcraft2->thugs->Chess->german techno->Love parade->disaster->death..
    http://www.youtube.com/watch?v=Q1wH2...eature=related

Similar Threads

  1. [MBTItm] The haiku thread...
    By anii in forum The NF Idyllic (ENFP, INFP, ENFJ, INFJ)
    Replies: 33
    Last Post: 01-22-2017, 11:03 PM
  2. the car thread
    By Nocapszy in forum The Bonfire
    Replies: 5
    Last Post: 01-29-2011, 06:36 PM
  3. The Beer Thread
    By Noel in forum The Bonfire
    Replies: 309
    Last Post: 02-03-2010, 12:07 PM
  4. The GHOST thread
    By swordpath in forum The Bonfire
    Replies: 14
    Last Post: 03-14-2008, 08:47 AM
  5. The Hundredth Thread
    By Rajah in forum The Bonfire
    Replies: 3
    Last Post: 04-24-2007, 12:22 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Single Sign On provided by vBSSO