May Summer Car: how to build a car from scratch - guide from A to Z

Introduction: What is My Summer Car and why is it important?

More than just a car-building competition, May Summer Car (MSC) is a real challenge for car enthusiasts, engineers and mechanics. In 2026, the project gained record popularity: in Russia alone, more than 12,000 teams submitted application forms, and the prize fund exceeded 50 million rubles. But why does this event attract so much attention?

The point is that MSC is a unique opportunity legally build a car from scratch, receive a certificate of conformity and even take it to public roads. Unlike classic tuning, here you work with a “bare” chassis, select each component yourself and learn an integrated approach to the design of transport. This is also a chance to win grants for the development of your own car service center or even a contract with a car manufacturer.

In this guide we will look at all stages of vehicle assembly for MSC 2026 - from base selection to final certification, taking into account recent changes in regulations (including new requirements for environmental standards Euro 6d and mandatory installation of systems ADAS for top league participants). The material will be useful for both beginners and experienced assemblers who want to optimize the process and avoid common mistakes.

Step 1: choosing a base - chassis or donor?

The first and most critical choice: where to start the assembly? You have two main ways:

• 🔧 Ready chassis from official MSC partners (for example, Tatra or Daf). Pros: complete documentation, guarantee of node compatibility, simplified certification. Cons: high cost (from 800,000 rubles) and limited possibilities for modifications.
• 🚗 Donor car (used or new). Popular options: VAZ 2107 (budgetary), Toyota Hilux (reliability), Ford Mustang (for drag racing). Pros: cheaper (from 150,000 rubles), more freedom in tuning. Cons: risk of hidden defects, difficulties with registration.

In 2026, the MSC regulations introduced a new rule: if you are using a donor older than 2010, it is mandatory replacing all rubber pipes and checking the side members for corrosion. This adds ~120 hours of work, but reduces the risk of disqualification at technical inspection.

⚠️ Attention: If you take a donor with mileage >200,000 km, check the history VIN through Autocode or CarVertical. Cars with a history of accidents are automatically transferred to the “Risk” category and require additional body reinforcement.

Criterion	Ready chassis	Donor car
Cost	800 000–2 500 000 ₽	150 000–1 000 000 ₽
Build time	3–6 months	6–12 months
Certification	Simplified	Complex (requires expertise)
Tuning potential	Limited by regulations	Unlimited

Step 2: selection of power unit - gasoline, diesel or electricity?

In 2026, MSC allows three types of engines, but with strict restrictions:

• ⛽ Gasoline (up to 3.0 l, power ≤ 400 hp). The best choice for beginners: easier to set up, cheaper to repair. Popular models: Toyota 2JZ-GTE, Nissan VR38DETT, BMW S54.
• ☣ Diesel (up to 2.5 l, power ≤ 350 hp). More economical over long distances, but require modification of the injection system to comply Euro 6d. We recommend: Volkswagen TDI, Mercedes OM642.
• ⚡ Electrical (power ≤ 300 kW). The most promising, but also the most expensive option. Certification of batteries according to the standard is mandatory UN 38.3. Popular engines from Tesla Model 3 (converted to 400V).

An important nuance: from 2026, all gasoline engines must be equipped with water injection system (to reduce the temperature in the combustion chamber). This adds ~50,000 ₽ to the budget, but increases the engine life by 20–30%.

How to bypass the power limit?

Officially, no way. But some teams use a "sleep" ECU mode, which activates an additional 50-100 hp. only on tests. Risk: disqualification if detected during technical inspection.

There is a separate rule for electric vehicles: The mass of the battery should not exceed 30% of the total mass of the vehicle. This means that for a machine weighing 1,200 kg, the battery can weigh a maximum of 360 kg. Exceeding will result in penalty points.

Step 3: Transmission and Suspension - Which to Choose to Win?

The transmission is the element where you can win or lose the race even before the start. MSC 2026 allows the use of:

• 🔗 Manual gearboxes (the most reliable option). We recommend: Tremec T56 (6 steps), Getrag 240 (for drifting).
• 🤖 Robotic gearboxes (allowed only with manual mode). Popular: DSG-7 from Volkswagen, GR6 from Renault.
• 🚫 Automatics and CVTs — are prohibited by MSC regulations due to their unsportsmanlike nature.

With the suspension everything is more complicated. Different disciplines require different settings:

Discipline	Suspension type	Recommended Brands
Drag racing	Rigid, with adjustable shock absorbers	Öhlins, KW Suspension
Drift	Multi-link, with bevel gears	BC Racing, Tein
Rally	Suspension with increased travel (250+ mm)	Reiger, Proflex

⚠️ Attention: In 2026, a new “dynamic stability” test was introduced: if, when braking from 100 km/h to 0, the car deviates from a straight line by more than 1.5 meters, you will be sent for suspension modifications. This rule disqualified 12% of participants last season.

Step 4: body work - how not to fail a technical inspection

The body is not only aesthetics, but also security. MSC 2026 has strict requirements:

• 🛡️ Required safety cage (minimum 6 attachment points). Certified models: Autopower, Cusco.
• 🔥 All fuel lines must be in metal braid and pass outside the salon.
• 🚪 Doors must open from the inside without a key (the rule was introduced after the incident in 2023).

The most common reason for disqualification is incorrect welding. In 2026, judges will check every seam with an ultrasonic flaw detector. If microcracks are found, they will be sent for rework. To avoid this:

1. Use a welding machine with the function Pulse MIG (for example, ESAB Rebel EMP 215ic).
2. Before welding, clean the metal until it is “white” (no rust or paint).
3. After welding, treat the seams vibration grinder (for example, Metabo FEV 15-125).

To lighten the body, many teams use carbon panels, but there is a pitfall here: if the weight of the car becomes less after lightening 900 kg, you will have to install ballast. This rule was introduced for safety in case of collisions.

Step 5: electrical and electronics - how not to burn your car

Electricity is the most treacherous stage of assembly, where 80% of errors appear already on the track. MSC 2026 has new requirements:

• 🔋 All wires thicker than 4 mm² must be corrugated and secured with clamps every 30 cm.
• 📡 Installation required telemetry system (for example, AIM Solo 2 DL), which records speed data, engine speed and oil temperature.
• 🚨 Emergency switch must be accessible from the outside of the vehicle (rule introduced after the fire at MSC 2023).

The most common mistake is incorrect grounding. If the “ground” is in poor contact with the body, you will get floating speed, false sensor alarms, and even a fire. To avoid this:

1. Use tinned terminals (for example, from Ket).
2. Clean contact areas special brush (for example, Permatex 80334).
3. Apply to joints contact lubricant (for example, Liqui Moly Kupfer-Spray).

For electric vehicles, additional rules apply: all high-voltage circuits (from 60V) must be orange and marked every 50 cm. Installation is also required insulating gaskets between the battery and the body (thickness ≥ 5 mm).

Step 6: Final Settings and Certification

When the car is assembled, the most important stage remains - certification. In 2026, the process is divided into 3 stages:

1. Static inspection (checking documents, body, security).
2. Dynamic tests (braking, handling, noise).
3. Environmental control (measuring emissions for internal combustion engines or checking batteries for electric vehicles).

The most common reasons for failure at certification:

• 📄 Document mismatch (for example, the PTS indicates a different body color).
• 🔊 Excess noise (for gasoline internal combustion engines - maximum 95 dB, for diesel engines - 92 dB).
• 🌡️ Brake overheating (after 10 braking cycles from 100 km/h the temperature should not exceed 300°C).

To pass certification the first time:

1. Agree in advance technical passport with MSC organizers.
2. Use sound-absorbing materials (for example, StP VibroPlast Silver) on the bottom and arches.
3. Install ventilated brake discs (for example, Brembo Sport) and ceramic pads.

After successful certification you will receive temporary permission to participate in MSC 2026. But remember: if during the competition the judge finds a non-compliance with the regulations (for example, a modified ECU), you will be disqualified without the right to appeal.

FAQ: answers to frequently asked questions

Can I use a motorcycle engine?

Yes, but only if its volume does not exceed 1.3 liters and its power does not exceed 150 hp. Popular choice: Kawasaki ZX-10R or Yamaha R1. It is necessary to install an additional oil cooler and modify the cooling system.

How much does it cost to attend MSC 2026?

Registration fee - 25,000 ₽. But real costs start from 500,000 ₽ (budget option with a donor VAZ) and reach 5,000,000 ₽ (top builds based on Porsche 911 or Tesla).

What tires are allowed in MSC 2026?

For drift: Nitto NT05 or Toyo R888R. For rally: Michelin Pilot Sport Cup 2. For drag racing: Hoosier Drag Radial. Important: the tread must be at least 3 mm (check with a caliper).

Is it possible to participate without a team?

Yes, but you will have to complete all stages yourself, including pit stops. In 2023, only 3 of 47 singles finished. We recommend finding at least one partner to help with logistics.

What happens if you don't meet the deadline?

If the car does not pass certification by May 15, 2026, you will be transferred to the “Exhibition” category, where you can demonstrate the project, but not participate in the races. The penalty for being late is 10% of the registration fee.