How Much Power Does a 700HP ECS TT Turbo Upgrade Unlock?

The pursuit of more horsepower is a constant drive for automotive enthusiasts. When a turbo upgrade promises a leap to 700 horsepower, the question isn't just about the number—it's about what that power means for the car’s behavior, reliability, and overall driving experience. ECS Tuning’s TT (Turbo Tuning) upgrade has become a benchmark for those seeking serious output from platforms like the Audi 2.0T or VW 1.8T engines. But the headline figure of 700 hp is only part of the story. This article breaks down exactly what the 700HP ECS TT Turbo Upgrade delivers, the supporting systems required, and the real-world considerations every builder must face.

Understanding Turbo Upgrade Fundamentals

A turbocharger recovers exhaust energy to compress intake air, forcing more oxygen into the combustion chamber. More oxygen, combined with more fuel, produces more power. However, simply bolting on a larger turbo doesn't automatically yield gains. The system relies on a chain of components: the turbine housing (exhaust side), compressor wheel (intake side), wastegate, actuators, and the engine management system. Upgrading means selecting a turbo that flows enough air to achieve the target horsepower while maintaining spool characteristics that suit the engine’s displacement and driving style.

The ECS TT Turbo Upgrade is engineered for high-boost, high-flow applications. It uses a larger billet compressor wheel and a ported turbine housing to reduce backpressure and increase airflow. But the raw output depends on the engine’s ability to handle that air—pistons, rods, head studs, and fuel delivery all play a role.

Inside the ECS TT Turbo Upgrade

Core Components and Design Philosophy

ECS Tuning is known for quality aftermarket parts. The TT upgrade is not a generic Chinese clone; it’s a purpose-built unit aimed at serious power levels. Key features include:

  • High-flow billet compressor wheel – CNC-machined for precise aerodynamic shape, reducing surge and increasing flow capacity.
  • Optimized A/R turbine housing – Matched to the engine’s displacement to balance low-end spool with top-end flow.
  • Heavy-duty wastegate actuator – Maintains stable boost pressure under load, crucial for preventing overboost or creep.
  • Reinforced bearing system – Uses a journal bearing or optional ball bearing upgrade for durability at high shaft speeds.

These design choices allow the turbo to support 700+ crank horsepower when paired with proper fueling and tuning. Without those supporting mods, the turbo may be oversized and result in poor drivability.

Power Output: What the 700HP Figure Actually Means

Crank vs. Wheel Horsepower

The “700HP” rating is typically measured at the crank (flywheel). At the wheels, drivetrain losses (15-25% for front-wheel drive, 20-30% for all-wheel drive) mean a car might see 500-560 wheel horsepower (whp). That’s still a massive increase over stock, which on a 2.0T engine is often around 200-250 whp. The ECS TT upgrade can deliver 350-400 whp gains with proper tuning.

Dyno Results and Real-World Examples

While exact numbers vary, documented builds show the ECS TT Turbo Kit on a built 2.0T with E85 fuel and a high-flow exhaust producing 620-650 whp on a Dynojet. That equates to roughly 700-730 crank hp. The torque curve is equally impressive—often exceeding 550 lb-ft at the wheels from 4,000 rpm onward. ECS Tuning’s official dyno sheets indicate these levels with their recommended supporting package.

Estimating Power Gains: Factors That Influence Results

Not every build realizes the full 700 hp. Key variables include:

  • Engine displacement – The 2.0T vs. 1.8T: larger engines spool turbos faster and move more air.
  • Compression ratio – Lower compression allows more boost but may reduce low-end response.
  • Fuel quality and octane – E85 or race gas provides knock resistance necessary for high boost.
  • Ambient conditions – Cool, dense air yields more power than hot, thin air.
  • Supporting modifications – Exhaust, intercooler, intake, and fuel system are non-negotiable.
  • Tuning precision – A conservative tune might leave 50-100 hp on the table but protects the engine.

On average, a well-prepared car with the ECS TT upgrade and 91 octane pump gas can expect 550-600 crank hp. To touch 700, you need E85 or race fuel and a maxed-out tune.

Benefits of Unlocking 700 HP

Acceleration and Track Performance

The immediate benefit is staggering acceleration. A 3,200 lb car with 700 hp has a power-to-weight ratio of 4.6 lb per hp—supercar territory. Quarter-mile times drop into the mid-10-second range with proper traction. On the highway, passing power is effortless; from 60 to 120 mph, the pull is relentless.

Driving Dynamics

Beyond straight-line speed, the upgraded turbo enhances responsiveness in the mid-range. The ECS TT is designed to spool reasonably quickly (full boost by 3,800-4,200 rpm), meaning you don’t have to wring the engine to redline to feel the surge. Throttle response sharpens compared to larger, laggier turbos, making the car more engaging on twisty roads.

Competitive Edge

With 700 hp, your vehicle enters a performance tier that can compete with modern supercars and high-end sports cars at the drag strip or track. It also opens the door to enthusiast events where power goals are a badge of honor.

Critical Considerations Before Installing the ECS TT Upgrade

Engine Integrity and Internal Modifications

The stock internals of most 2.0T engines (like the VW EA888 or Audi 2.0TFSI) are not designed for 700 hp. The connecting rods, pistons, and bearings will fail under sustained high boost. Forged rods and pistons are mandatory for any build aiming over 450 whp. Additionally, head studs (ARP) and a multi-layer steel head gasket are needed to contain cylinder pressure.

Fuel System Upgrades

Stock fuel pumps and injectors cannot deliver enough volume for 700 hp. You will need:

  • High-flow low-pressure fuel pump (in-tank).
  • Larger high-pressure fuel pump (HPFP) or port injection.
  • Oversized injectors (at least 1,000 cc/min for gasoline, 1,300+ cc for E85).
  • Fuel pressure regulator and lines rated for high flow.

Failure to upgrade the fuel system leads to lean conditions and catastrophic engine failure.

Cooling Demands

700 hp generates massive heat. The intercooler must be upgraded to a large front-mount unit (e.g., 3.5” thick core). The radiator should be replaced with a higher-capacity aluminum unit, and an oil cooler is highly recommended to keep oil temperatures below 250°F during sustained pulls. Without adequate cooling, intake air temperatures skyrocket, causing knock and power loss.

Essential Supporting Modifications

To safely and reliably unlock the full potential of the ECS TT upgrade, these parts are non-negotiable:

  • Exhaust system: 3-inch downpipe to a full 3-inch cat-back with minimal restriction. 034Motorsport and ECS offer complete turbo-back exhaust kits.
  • Intake system: A high-flow intake with a larger filter and smooth piping to reduce restriction.
  • Charge piping: Reinforced silicone or aluminum pipes rated for high boost (35+ psi).
  • Wastegate and blow-off valve: Upgraded external wastegate (e.g., Tial 38mm or 44mm) to control boost precisely. A quality BOV prevents compressor surge.
  • Engine management: Standalone ECU (like Syvecs or ECU Master) or a piggyback tune (Unitronic, APR, or custom Cobb Accessport) with wideband lambda control.

Tuning and Calibration: The Make-or-Break Element

Bolting on the turbo is only half the work. Professional tuning is critical. A reputable tuner will dial in:

  • Air-fuel ratios – Target 11.5-12.0:1 for gasoline, richer for E85.
  • Boost curve – Ramp up smoothly to avoid shocking the drivetrain.
  • Ignition timing – Optimize for power without knock.
  • Boost control – Use a solenoid-based system with fail-safes to prevent overboost.

Many shops recommend dyno tuning rather than remote tunes because 700 hp leaves no room for error. A poor tune can destroy a built engine in minutes. APR and Unitronic offer off-the-shelf tunes for ECS turbo kits, but a custom e-tune or dyno tune is preferred for maximum safe power.

Reliability and Maintenance After the Upgrade

With 700 hp comes increased wear and tear. Oil change intervals should drop to 3,000 miles or less with high-quality synthetic 5W-40. Spark plugs (colder heat range, gapped properly) need replacement every 5,000 miles. Regular boost leak tests and visual inspections of the turbo and charge pipes are necessary. The drivetrain—clutch, transmission, axles—will also require upgrades. Expect to replace the clutch with a twin-disc unit and possibly upgrade the differential or axles to handle the torque.

Cost Breakdown: What Does It Take to Get to 700 HP?

A rough estimate for a complete 700 hp build on a 2.0T platform using the ECS TT upgrade:

  • ECS TT Turbo Kit: $2,500 – $3,500
  • Forged internals (rods, pistons, bearings): $1,200 – $2,000
  • Head studs and gasket: $300 – $500
  • Fuel system upgrades (HPFP, injectors, lines): $1,500 – $2,500
  • Intercooler, radiator, oil cooler: $1,000 – $2,000
  • Exhaust system (turbo-back): $1,000 – $1,800
  • Tuning and dyno time: $600 – $1,200
  • Labor (if not DIY): $2,000 – $4,000
  • Clutch upgrade: $800 – $1,500

Total: $10,000 – $18,000 depending on quality and labor. This doesn’t include potential transmission or axle upgrades. For many, the total investment exceeds $20,000 to do it right.

Conclusion

The 700HP ECS TT Turbo Upgrade is a genuine path to supercar power, but it is not a bolt-on miracle. It unlocks significant horsepower—up to 700 at the crank and 600+ at the wheels—when combined with forged internals, upgraded fuel and cooling systems, and expert tuning. The driving experience transforms: blistering acceleration, usable mid-range torque, and the ability to humiliate much more expensive hardware. However, the upgrade demands a substantial financial and maintenance commitment. For those who carefully plan their build and invest in supporting modifications, the ECS TT Turbo delivers a thrilling, reliable, and powerful machine. ECS Tuning’s product pages and community forums provide further specific guidance for each vehicle platform.