The Speed Ep1 - It's On!

Soni Pirhana SST

It’s fast, agile, and looks badass.

This is no ordinary 1977 Soni Piranha Coupe anymore. It underwent extensive modifications and has become the ultimate track monster.

The 2.3L I5 was bored out to 2.8L, and a centrifugal supercharger was added for better performance. The block was changed to high-quality aluminum, the internals were reinforced, and a better-breathing intake and exhaust were installed to let this engine scream up to 9,500 RPM. This resulted in the engine producing 770 hp and 660 Nm of torque.

To put all this power to the ground, a modern six-speed auto-manual transmission was installed, and the old differential was replaced with an electric LSD. With some huge semislicks to provide the necessary traction, it can surely be considered a track toy.

Major bodywork was also done to make the car more streamlined and produce the necessary downforce, including a front lip, rear spoiler, diffuser, cooling vents, etc. After all these modifications, it weighs around 1.2 tons (I don’t know why it got so much heavier).

8 Likes

I’ve got a few questions regarding the car tuning:

  • Does safety have to be 2000/2010 Advanced Safety? Or can I use older advanced safety (eg. 80s safety for an 80s car)?
  • Are there any WES requirements for tuned cars, or any other restrictions to keep cars street legal (eg. loudness)?
  • Can model or engine family years be set to 2005? Or do those have to be the same year as the original car (eg. 1984, while the variant is 2005).

In fact, the glued aluminum chassis in the game is similar to the Elise chassis

Will the race require the lap speed of the vehicle? Or rather, regardless of him

@br1ckfield3r

  1. As long as it has advanced in the name, then you should be good.

  2. Nope on both

  3. Same year as provided, otherwise it’d be a reproduction, only trim and variant must be set to 2005


@user3

The race will be done so by our parameters, this is to reduce the stress of the participants.


Everyone that has entered the race, please put your names in, I need all 28 names:

5 Likes

1972 Stalwartness TA

This little pony has been highly modified for scca trans-am racing

for starters; the body has been modified to be wider and simplified for easy panel replacement, the rear wing was swapped with a bigger one, big front splitter was fitted, brake cooling air ducts put in the front bumper, and headlights have been removed. In the interior a rollcage and race bucket seats have been added, the rear bench seat has been removed, and while being a race car it still has a radio system.

Engine has been hopped up too! displacement was increased from 3.5L to 3.7L, to give this 167hp pushrod I6 some umph a 104mm turbo pushing 41 psi was installed bringing this thing all the way to 870hp & 780ib-ft of torque while on pump gas! All that power is being pushed through the original 4 speed manual transmission and a new 4.8 helical lsd diff letting this thing fly to 326km/h. Combined with some 375 semislick tyres on the rear if your not careful this thing will still light up the tyres at almost any speed.

12 Likes

omg thats so F beautifull good job!

Argon Tempest GSC - “Stacked Deck”

The “Stacked Deck“ Tempest is a 1984 Argon Tempest GSC turned into an elite super car. Besides the extensive performance modifications, the car also received modern quality-of-life upgrades like a high quality interior, new driving aids, reinforced drive train components. Overall it is a well-rounded machine that is sportier, safer, easier to drive, and more reliable than the original donor vehicle.

Drivetrain

Engine

Design changes

The original SBC Series 2 engine (6.4L Alu block pushrod V8) has received an upgraded AlSi block bored out to a new capacity of 6.7L. The internals have been replaced with heavy-duty forged components and a lightweight balancing mass, letting the engine rev to 7000 rpm. A massive centrifugal supercharger making 2.9 bar of boost has been installed (a turbo would not fit in the already cramped engine bay). It is operated by a clutch to improve fuel economy off the throttle (the supercharger takes 462 Nm of torque to spin). Tubular headers and a sportier twin intake with MPFI have been installed for increased efficiency.

Specifications

  • 1563 hp @ 6700 rpm
  • 1786 Nm @ 5700 rpm
  • 281 kg
  • 21.3% efficiency
  • 459230 km Mean Time To Failure
  • Runs on 95 RON

Transmission

The stock transmission has been replaced with a high-quality 6-speed manual gearbox and a Helical LSD on the driven rear axle. The higher gears have closer spacing than the lower gears to make better use of the narrow peak power band. The lower gears don’t need this spacing because of wheelspin even outside of peak power.

Wheels and Brakes

The stock wheels have been replaced with 315 mm semi slicks on 18 inch forged rims, with 375 mm and 320 mm vented disc brakes. The new assembly has a perfect 0% brake fade.

Body

Aero

All the panels on the car were replaced with lighter and more aerodynamic ones, and additional cooling vents + downforce fixtures have been installed. The new cooling capacity is now 30% higher than required by the engine, allowing the car to be driven hard without overheating. As for downforce, the car makes a staggering 4200 kg combined at the 400 km/h top speed, almost 3 times the weight of the whole car. The only downside is that this system produces an immense amount of drag, significantly lowering the fuel economy.

Interior and Driving Aids

The interior has been upgraded to a high quality sports one with premium satellite navigation and an upgraded safety system. The car also features Electric Variable power steering, Electronic Stability Control, and Semi-Active sway bars to elevate the driver experience. The car also received new progressive springs and gas mono-tube dampers. While the trunk is not very big, the new springs have a very high load capacity, perfect for transporting gold bricks, engine blocks and more.

Livery

The car features a livery closely resembling the one used by members of the Stacked Deck street racing crew, hence the nickname of the car. This crew was active a city over and controlled the entire urban racing scene in the hands of Darius. However, the crew has since lost all its territory and fallen apart. Rumour is that Darius himself is the driver of this tuned Argon Tempest, seeking to regain his lost glory.

Performance

Top Speed: 400 km/h

0 - 60 mph: 3.64 s

1/4 Mile: 10.05 s

20 m Radius Cornering: 1.34 g

200 m Radius Cornering: 2.64 g

Weight: 1451.5 kg

Automation Test Track Hot Lap: 1:49.62

Max Straight Line Acceleration: 1.23 g @ 172 km/h

Misc. Stats

Load Capacity: 1410.1 kg

Total Reliability: 67.7

Prestige: 71.7

Fuel Economy: 18.4 L/100km or 12.8 mpg

Seats: 2 full-size

Cargo Volume: 214L

Octane Required: Premium 95 RON

Approximate Cost: $97800

Drive Type: RWD

Comparison Photos

Major thanks to @HyperMud for the original vehicle, the great initial design really helped to make an absolute missile of a car. A completed interior was also very much appreciated, for I’m not patient enough to make those from scratch :smiley:

7 Likes

Unveiling… the Maestro House “Entropy”

An 800+ HP monster descends onto the streets of L.A…

The trip from San Diego to Los Angeles could not have taken longer. You would think leaving early in the morning would beat the traffic, but as it turns out, many people have the same idea as you. Guess 6am isn’t early enough. But for Mr. Wolfram, it gave him enough time to think. He knew it wouldn’t be much longer before his latest project would finally start showing its teeth, and this belief would soon be tested in L.A’s street racing scene.

The idea for the car wasn’t too far fetched. Using Norðwagen’s Ragnarøk S-6x2 as a basis purchased at an auction (and at a steal he says), Mr. Wolfram’s focus was to combine his recent time-attack expertise with a build that could also be used directly on the street. His first step into recognizing his vision was to design the exterior.


The demo car, nicknamed Entropy, is Maestro House’s most recent project; a shining example of the knowledge Wolfram has gained over nearly a decade of tuning experience.

First to change was the paint. The car was repainted in M.H’s “Warmouth White”, but opted to expose their carbon fiber roof. A large chrome M.H Racing decal sits diagonally across the rear fender. The aero kit was designed in collaboration with Japan-based Dynamica, who developed the front splitter and canards, sideskirts, rear diffuser, roof scoop and wing.
For the front half, the headlights were now converted almost exclusively into air intakes. Twin deep vents on the hood provided cooling for the front-mounted oil cooler. At the rear, the Norðwagen’s bumper grille got a redesign. Gone was the thick rear bumper, now replaced by a lightweight construction. Four rear speed holes were slotted in for weight reduction, a grille inset adorned the abbreviated Maestro House “M.H” badge. A rain light fills in the space. Rear aero spats now stick out from the sides of the rear bumper for added stability.
The carbon Dynamica diffuser and rear wing channels even more airflow to stabilize the car. Over the rear fenders, a large NACA duct now sits atop to cool the bored-out 3.3L flat-six. The slick rear louvers that originally sat on the car were now replaced with plexiglass. Maestro House were serious about this being half-and-half for track use. But some other items were added just for the aesthetics, according to Wolfram.

For “added visual flair”, M.H put Catshark neon lighting into the engine bay at the rear and the footwells within the cabin. The taillights were swapped for chromed-out OEM-style lights. At the front in the grille, a pair of aftermarket foglights sit nice and snug to light the road.



It couldn’t be a track car without modified suspension. Even for a car that came standard with pushrods, Wolfram wasn’t fully satisfied. For that task, Maestro House reached out to Grenadier Suspensions for additional suspension work. The new coilovers and setup allowed for the car to not just be more predictable, but be more comfortable as well. The braking system was upgraded to add modern ABS. Additionally, 6-pot calipers are now equipped all-around. The wheels chosen for the build were 18" Believer Sport gold forged center-lock wheels. The rubber was upgraded to semi-slicks.

Moving inside, the already hardcore, track-ready interior of the Ragnarøk was further enhanced to fit Wolfram’s vision. The seats were now swapped out for genuine sport buckets, supplied by Labrador. In the gauge cluster, a focused and lightweight QTA Racing gauge was swapped in. The steering rack was changed for a lighter weight carbon-aluminum construction, and the steering wheel was replaced by a quick-release flat-bottom steering wheel instead. Another M.H badge pops up over the wheel’s gold center cap. The key that once sat on the left of the driver is now replaced with an ignition system used in racecars.



Delving into the mystical creation of the engine, the M.H construction of it is nothing short of wild. The engine’s been rebuilt with a billet block, new forged pistons and rods, and a 3.3L bore increase up from the original 3.1L. A new piggyback ECU was mounted and a tune has increased the rev limiter to 9000rpm. The heads were now a polished gold color.
It looks like Wolfram still aimed to be a bit purist though, deciding to keep the centrifugal supercharger versus the installation of a turbocharger. When asked about it, he essentially likened it down to the power curve of the supercharger, mentioning it was more “supplementary to the build” and that he “liked it” more than the delivery of a turbo. The engine was also upgraded with a better fuel delivery system and converted to E85.
All these upgrades have delivered the Ragnarøk’s already powerful flat-six to a staggering 820hp, ready to take on any opponent. The transmission remains the same: a 5-speed manual. But the final drive has now been replaced to a 4.40 rear, allowing the car to hit a 0-60 of just 2.9s. Very impressive. Its top speed was recorded recently too, a few months ago. (See below.)

All-in-all, the M.H “Entropy” takes an already impressive car from the 80’s and turns it into something even faster and surprisingly a bit easier to drive. Jumping nearly 200hp over stock in a car as light as this is nothing to scoff at. We’ll soon see what Mr. Wolfram will do next in L.A. With his sights on entering the Silver State Challenge in Nevada next year, butting heads with the other tuners in L.A. just might be what he needs to learn and optimize his build for the challenges that lay ahead.

16 Likes

can I change car model year?

No, only trim and variant must be changed to 2005. Model and family years are not to be changed

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    Tuned car
    from: geraldtuning.house@
    to: @
    subject: heythere
    date : x,x#, xxxx at xx:xx am
    2005 Kairu 560T Firenze

    tuned spec:
    1/4 mile: 10.51s
    0-100: 3.3s
    topspeed: 370kph
    hp:~700
    bolt on centrifugal supercharger, reinforced internal, custom headers
    7 Likes

    is sequential gearbox considered race?

    It is allowed

    1 Like

    Sparkhill - MS

    the old Sparkhill sports car but tunned by MS corporation. Bigger and spoortier tires, upgraded brakes and better downforce with MS tunned and certified compound turbo atatched to the original very capable block, now MS sport heads feeded by top of the art Direct injection sistem running on ethanol pushing 700+ horsepower . now fitted with a 6 speed sequential gearbox its now capable of running 400 meters in 10 seconds and reaching 1000 meters 7 seconds after. MS sport+ shocks/springs and upgraded sway bars to keep everything stable turning at 1.16g, top speed 370+ km/h

    6 Likes

    The Tarantasia Ghoul Lynx GTO – A Demon Woken in 1995

    It wears the skin of a 1969 legend. But under that blood-red paint lies a 1995 soul—a mechanical devil forged from the obsessive genius of Lynx Len. This is not merely a car; it is a sentient pact, the very blueprint that built an empire.

    The Dual Nature: God and Demon in One Chassis.
    The Ghoul is a walking contradiction. At idle, it purrs softer and smoother than its stock 1969 ancestor—an utterly seductive illusion designed to hypnotize you into complacency. But when the SOHC V8 screams past 7,500 RPM, it transforms into a relentless deity, unleashing 790.5 raw, mechanical horses that will carry you to 400 km/h. Stripped of any electronics—no ECU, no traction control, only a mandatory vintage ABS—it is a pristine symphony of pure mechanical order. Despite its 1980s architecture, Len’s obsessive perfectionism has tuned the combustion to flawlessly pass post-2010 emission standards.

    The Cruel Irony of the “Dumb Speed” Era.
    Make no mistake: This machine despises the modern “dumb-fast” cars. Those high-tech gizmos and ECUs are just artificial life-support systems. They hide the physics from the driver, masking the boundaries until the moment of impact—a violent, ignorant death with zero warning. The Ghoul offers no such false security. It exposes the razor’s edge in real-time, stripping you naked against the asphalt. It doesn’t crave your blood; it craves your consciousness. It is a demon eagerly drooling over your mental clarity, demanding absolute spiritual harmony with its mechanical geometry.

    To Surrender is to Ascend.
    There is no “taming” this beast. You don’t drive it; you surrender to it. If you fight the steering wheel, it will crush you. But if you soften your mind, merge your intentions with its preternatural chassis flex, and bow to its mid-engine balance, the chaos becomes divine. The 400 km/h wind becomes an effortless flow—a terrifying yet serene transcendence reserved only for those pure of spirit. It is not a car for the ordinary; it is a test of spiritual worth.

    The Ghost’s Lament: A Short Lifespan, a Heavenly Embrace.
    To survive such velocity, the steel monocoque has been brutally over-engineered. Yet, this rigidity demands a terrifying price: the chassis is notoriously short-lived. Every mile is a burning leaf in the wind, a sacrifice of its own physical lifespan so that it may grant you the thrill of the chase.

    Los Angeles, 2005 – The Auction of Betrayal:
    In the hazy, neon-lit underbelly of 2005 LA, trust is a currency for sale, and one of you is a mole. This crimson predator sits on the auction block, carrying an empire’s legacy on its 1,062 kg frame. It guarantees the escape and the win. But with this car, the ultimate choice is never about the road—it is about who you choose to become when the demon finally reaches out from the steering wheel to shake your hand. Will you survive its temptation?

    10 Likes

    18 Likes

    Love to see that old car pushing it’s limits

    3 Likes

    You’re making me want to play Underground again just from that advert

    4 Likes

    |

    The Speed: Deadline
    Los Angeles, USA :us: - 2005
    Due when?
    |
    August 7th
    Los Angeles, USA :us: - 2005
    20 Days Remain…

    To make it so that folks would get their submissions in, August 7 at any time zone will be the deadline.

    Me and @Kreator would appreciate your cooperation

    8 Likes