Professional Racing Fuel S85 20 l
| Fuel type: | Fuel mixture 85% alcohol and 15% high-quality hydrocarbons |
| Requirements: | Requires mandatory engine tuning and ignition timing adjustment! |
| Brand line: | Hyper Fuel |
| Produced: | Russia |
2860 ₽
* Minimum order amount for products in the "Racing" category - 4000 ₽
Characteristics Professional Racing Fuel S85
S85 Fuel Application Guide
What is S85?
S85 is an alcohol-based fuel consisting of:
- 85% ethanol (bioethanol, ~105-109 RON octane)
- 15% gasoline (for improved cold starts)
Differs from standard E85 through stricter purity standards and composition stability ("S" often denotes "racing specification").
Where is S85 Used?
🔹 Professional Motorsport:
- Drag racing (classes where methanol is prohibited but ethanol permitted)
- Drift (many turbo builds switch to S85)
- Rally (especially in Scandinavia and Brazil)
🔹 Tuned Vehicles:
- Turbocharged Japanese cars (Supra, GT-R, EVO)
- American muscle cars (Mustang, Camaro, Corvette)
- European sports cars (BMW M, Porsche 911)
🔹 Motorcycle Racing:
- Supercharged race bikes
- Drag bikes
🔹 Experimental Vehicles:
- Performance ATVs
- Off-road buggies
Optimal Compression Ratios
| Engine Type | Compression Ratio | Key Features |
|---|---|---|
| Naturally Aspirated | 12:1 - 14:1 | Peak efficiency |
| Turbocharged | 9:1 - 11:1 | At 1.8-2.5 bar boost |
| Supercharged | 8:1 - 10:1 | Up to 3.0 bar boost |
Key Characteristics:
- Ethanol tolerates higher compression than gasoline
- Cooling effect of evaporation enables increased boost
Required Engine Modifications
🔧 1. Fuel System
| Component | Requirements | Reason |
|---|---|---|
| Injectors | +30-40% flow capacity | S85 requires greater volume |
| Fuel Pump | High-flow (400+ LPH) | |
| Hoses | Ethanol-compatible (Viton) | Standard rubber degrades |
| Tank | Corrosion protection | Ethanol is hygroscopic |
🔧 2. Ignition System
- Spark Plugs: 1-2 steps colder
- Timing Advance: +5-8° (ethanol burns slower)
- Coils: Upgraded
🔧 3. Engine Components
| Part | Modifications |
|---|---|
| Pistons | Forged (for high temps) |
| Valves | Reinforced |
| Head Gasket | Multi-layer steel |
| Turbo | Increased blade clearance |
🔧 4. Additional Systems
- Fuel heating (for cold starts below +10°C/50°F)
- Ethanol content sensor (FlexFuel adaptation)
- Enhanced PCV system
Pros and Cons
✅ Advantages:
- +15-25% power gain
- Cheaper than race gasoline
- More eco-friendly (lower CO₂ emissions)
- Superior knock resistance
🚫 Disadvantages:
- 35-40% higher consumption (lower energy density)
- Hard cold starts (below +5°C/41°F)
- Limited availability
Conclusion: When to Choose S85?
🔹 Ideal when:
- Seeking maximum power on a budget
- Engine already built for high compression/boost
- Quality fuel sources available
🔹 Avoid if:
- Used for daily commuting
- Living in cold climates (below -10°C/14°F)
- Unwilling to fully modify fuel system
