What Is the FP Red Turbo and Why It Matters for the Evo Platform?

The FP Red turbocharger, manufactured by Forced Performance, is one of the most popular aftermarket bolt-on upgrades for the Mitsubishi Lancer Evolution (Evo VIII, IX, and X). It is designed as a direct replacement for the factory TD05HR turbo, offering a larger compressor wheel, a revised turbine housing, and improved aerodynamics. Unlike some race-only turbos that sacrifice spool for top-end power, the FP Red aims to provide a balance of quick response and substantial horsepower gains—often enough to push an Evo past 500 wheel horsepower with proper supporting modifications.

Understanding the real-world power gains of the FP Red requires looking at more than just a peak number. Factors such as the specific Evo generation, fuel type, tuning strategy, and the condition of the engine all influence final output. This article dives into dyno-proven figures, explains the engineering behind the turbo, and outlines exactly what you need to do to safely maximize its potential.

FP Red Turbo Design and Specifications

The FP Red is based on the Garrett GT3076R or GT3082R core (depending on the version) mated to a custom Evo-specific exhaust housing. Key specifications include:

  • Compressor wheel: 57mm inducer / 76mm exducer (Red 76-79 for Evo)
  • Turbine wheel: 68mm exducer
  • Turbine housing: 8cm² or 10cm² twin-scroll inlet (Evo X uses a single-scroll housing)
  • Journal bearing or ball bearing – ball bearing versions offer faster spool and better reliability
  • Wastegate: Integrative ported internal gate (can be upgraded to an external gate for higher boost levels)

Compared to the stock TD05HR, which has a smaller 49mm inducer compressor wheel, the FP Red flows roughly 30–40% more air at the same pressure ratio. This translates directly into higher horsepower potential, but it also means the turbo spins faster and generates more heat, requiring careful thermal management and high-octane fuel.

Baseline: Stock Evo Horsepower and Limitations

To evaluate gains accurately, we must establish a baseline. Stock Evos from the factory deliver:

  • Evo VIII: ~271 bhp (approx 240–250 whp on a typical dyno)
  • Evo IX: ~286 bhp (MIVEC-equipped, ~260 whp on dynojet)
  • Evo X: ~300 bhp (with 2.0L 4B11T, ~270 whp)

These numbers are limited by the small TD05 turbo, restrictive intake and exhaust, and conservative factory tuning. The stock turbo runs out of airflow around 5000–5500 rpm, causing the power curve to flatten. With a simple ECU reflash and cat-back exhaust, an Evo may gain 20–30 whp, but the real bottleneck remains the turbo itself.

How Much Horsepower Does an FP Red Add? Dyno-Proven Gains

The answer depends heavily on the supporting setup. Below are real-world results from reputable tuning shops and documented owner builds. All figures are wheel horsepower (whp) unless noted, which is the actual power measured at the tires (typically 15–20% drivetrain loss for an Evo).

Stock Block, Minimal Supporting Mods (E85 or Pump Gas)

With just a fuel pump upgrade, injectors (around 750–1000cc), a good intercooler, and a custom tune on 93-octane pump gas, many Evo VIII/IX owners have seen:

  • 93 octane: 360–390 whp at 22–24 psi
  • E85: 400–430 whp at 26–28 psi

These numbers represent gains of 100–170 whp over stock, which is a noticeable increase but still within safe limits for the stock forged internals (especially in the Evo VIII/IX). The torque curve is much fatter, with peak torque often exceeding 350 lb-ft on E85.

Stock Block with Full Bolt-Ons and Race Fuel

Adding a larger intercooler, ported exhaust manifold, larger downpipe, and a 3-inch cat-back exhaust pushes the system further. On C16 race gas (112 octane) or dedicated E98, dyno sheets from tuning professionals show:

  • Evo VIII/IX: 450–490 whp at 30–33 psi
  • Evo X: 430–470 whp (tends to be slightly lower due to single-scroll housing and weaker rods)

At this level, the FP Red is operating near its peak efficiency island. Some shops have reported 500 whp on a hub dyno, but on a Dynojet that number is closer to 485–495 whp. The limit is usually the stock rods and pistons (the Evo IX has stronger rods than the VIII, but cast pistons still cap around 550 whp).

Built Motor – 600+ Whp Capability

With forged pistons, rods, upgraded valvetrain, and a fully built head, the FP Red can be pushed beyond its typical 500 whp ceiling. Because the turbo is physically sized for around 50–65 lb/min airflow, it maxes out around 600 whp on a built engine. Real examples:

  • Evo IX with 2.2L stroker, FP Red, E85, external wastegate: 565 whp at 35 psi
  • Evo VIII with 2.0L built motor, FP Red on pump/meth injection: 540 whp

These builds require extensive fuel system work (larger lines, surge tank, Dual Walbro 450 pumps), upgraded ignition, and often a stand-alone ECU such as a Haltech or Motec. At this point, the FP Red becomes the limiting factor; moving to a next-generation turbo like the FP Black or a Garrett GTX3582R would be needed for 650+ whp.

Torque and Spool Characteristics

One of the reasons the FP Red remains popular is its spool speed. Unlike a larger turbo that doesn’t build boost until 4500 rpm, the FP Red reaches full boost (22–24 psi) by 3800–4000 rpm on a 2.0L with twin-scroll housing. On Evo IX’s MIVEC engine, spool can be even quicker—around 3600 rpm. This makes the car very drivable on the street, with a broad powerband from 4000 to 7500 rpm. The torque curve is peaky but not as narrow as a massive 67mm turbo.

Here’s a typical dyno graph summary:

  • 3500 rpm: 250 whp / 300 lb-ft
  • 4500 rpm: 360 whp / 380 lb-ft
  • 5500 rpm: 420 whp / 390 lb-ft
  • 7000 rpm: 440 whp / 350 lb-ft

This shape makes the FP Red a strong daily driver/track car turbo, unlike a “laggy” GT35R which may not hit full boost until 4800 rpm.

Factors That Influence Real Power Gains

Several variables can lower or raise the horsepower you actually see from an FP Red upgrade:

Engine Condition and Compression

A healthy engine with good compression (150 psi or higher across all cylinders) will spool the turbo faster and produce more knock margin. Worn ring lands, low compression, or leaking valves will significantly reduce output. Some owners install a new head gasket and ARP head studs even on a stock engine to handle 500 whp.

Fuel Quality and Octane

E85 is the preferred fuel because of its high octane (around 105) and cooling effect. Pump gas (93 octane) may limit boost to around 24–25 psi to avoid knock, while E85 allows 28–30 psi safely. Running lower octane (like 91 from California) will drop peak power by 30–50 whp. Fuel choice makes a huge difference in any turbocharged setup.

Tuning Quality – The X-Factor

Aggressive timing, proper VE correction, and fueling optimization can unlock 30–50 whp more than a simple “base map.” A poor tune may leave power on the table or even damage the engine. Reputable tuners like Tephra, ECUFlash, or EcuTek professionals are essential. A dyno tune is always recommended over e-tuning for a major turbo swap.

Boost Level and Exhaust Backpressure

Higher boost (e.g., 32 psi vs 24 psi) yields more power, but only up to the turbo’s choke flow limit. Running an external wastegate with a dump tube reduces backpressure and can add 10–20 whp at high RPM. Also, a 3-inch downpipe and 3-inch exhaust are mandatory; a 2.5-inch exhaust will strangle the top end.

Supporting Modifications You Should Not Skip

To safely run an FP Red and achieve the numbers described, the following parts are strongly recommended:

  • Fuel system: At a minimum, a Walbro 255 or AEM 340 lph fuel pump, 1000cc or larger injectors (ID1000 or FIC), and preferably a fuel pressure regulator. For E85 with over 450 whp, a secondary fuel pump or surge tank setup is needed.
  • Intercooler: Stock Evo intercooler is inadequate; upgrade to a large front-mount (ETS, AMS, or PRL).
  • Intake: 4-inch cold air intake with larger MAF housing or switch to SD (speed density) tuning to avoid MAF ceiling.
  • Exhaust: Ported exhaust manifold (or a tubular manifold), 3-inch downpipe, and 3-inch cat-back.
  • Boost controller: Electronic boost controller (like AEM Tru-Boost or Boost Controller) to hold steady high boost.
  • Engine management: ECUFlash (open source), EcuTek, or a stand-alone Haltech for maximum control.

Neglecting any of these items will result in slower spool, lower peak power, or unreliable operation. Many “disappointing” FP Red results are traced to a stock intercooler heat-soaking or injectors that can’t keep up.

Installation Considerations and Common Pitfalls

Installing an FP Red is a straightforward bolt-on for most Evos, but there are a few details to be wary of:

  • Oil feed and drain: Use a -3AN or -4AN feed line and a proper -10AN drain. The stock drain may be too restrictive, causing seal leaks.
  • Water lines: The FP Red is water-cooled; ensure rubber hoses are in good condition and not kinked.
  • Turbo inlet pipe: You will likely need a 4-inch silicone inlet pipe to match the larger compressor cover.
  • Heat protection: Wrap the downpipe and turbine housing to keep engine bay temperatures down.
  • Recirculation valve: A decent BOV that can hold 30+ psi (like Tial Q) is necessary to avoid compressor surge.

If you are installing on an Evo X, note that the twin-scroll housing is not available for the X’s single-scroll manifold without a custom adapter. The FP Red for Evo X uses a single-scroll 10cm² housing, which slightly delays spool (around 200-300 rpm later) but still performs well. Some owners convert to a twin-scroll manifold and housing for quicker response, but that adds complexity.

Reliability and Engine Longevity

The FP Red is considered one of the safest “big” turbos for a stock Evo engine, provided the tune is conservative. The stock Evo VIII/IX rods are forged steel and can handle up to about 500–550 whp with good tuning. The pistons are hypereutectic cast, which become a weak point above 500 whp. For 600 whp builds, forged pistons (Wiseco, JE) are mandatory. Crank is generally fine.

At 400–450 whp levels, an FP Red can last 50,000+ miles if maintained properly (oil changes every 3000 miles with high-quality synthetic). The turbo itself is rebuildable. Many owners report running an FP Red for 40k miles without issue.

However, be cautious: pushing 30+ psi on pump gas with high intake temperatures can cause severe knock leading to ring land failure. A reliable setup includes a good intercooler, methanol injection as a safety buffer, or dedicated E85.

Real-World Builds and Dyno Sheets

To illustrate, here are three documented builds that showcase the FP Red’s capabilities:

  • 2003 Evo VIII – “Streetable 450”
    Owner: Jack from SoCal. FP Red (journal bearing), 1000cc injectors, Walbro 400, ETS intercooler, 3-inch exhaust, EcuTek tune on 93 octane. Dynojet result: 415 whp / 380 lb-ft at 24 psi. Daily driven for 3 years.
  • 2006 Evo IX – “E85 Monster”
    Owner: MitsuTech Forum user. FP Red (ball bearing), ID1700 injectors, double pump surge kit, AMS intercooler, custom tune on E85. Dyno Dynamics: 485 whp (corrected to ~515 whp on Dynojet) at 31 psi. 0-60 in 3.3 seconds on street tires.
  • 2008 Evo X – “Sleeper 500”
    Owner: BoostedLancer. FP Red X, 4-inch intake, Tial BOV, full COBB tune, HKS downpipe. On 93 octane with meth injection: 450 whp. Switched to E85 and raised boost to 29 psi: 502 whp. Engine stock except for ARP head studs.

These real numbers align with the general 400–500 whp range that FP Red is famous for.

FP Red vs. Other Evo Turbo Upgrades

How does it compare to other popular turbos?

  • FP Green: Smaller than Red, spools 300 rpm quicker, maxes around 420 whp. Good for quick spool but leaves power on the table.
  • FP Black: Larger wheel (possibly GT3582R), max 650+ whp, but spools 500–600 rpm later. Requires built engine at high output.
  • GT3076R (Garrett): Very similar to FP Red; some say the FP Red has a better turbine housing for Evo spool. Comparable power.
  • Precision 5858: Journal bearing, similar range but usually cheaper. Slightly laggier.

For most enthusiasts, the FP Red offers the best compromise of drivability and power potential without requiring a built block.

Cost of the Upgrade and Realistic Budget

A new FP Red turbo (ball bearing version) costs around $1,500–$1,800. Used ones can be found for $800–$1,200 but require inspection. Add supporting mods (fuel, intercooler, tune, exhaust): easily $2,000–$4,000 more. Installation labor if not DIY: $800–$1,500. Total budget for a reliable 450 whp setup: $5,000–$6,500. The value is high compared to more exotic setups.

Conclusion: Is the FP Red Right for You?

The FP Red Evo Turbo upgrade is one of the best all-around choices for any Mitsubishi Lancer Evolution owner seeking real, reliable horsepower gains. In terms of raw power, expect 400–500 wheel horsepower on a stock engine with proper supporting mods, and up to 600 whp with a built bottom end. The turbo spools quickly, retains street manners, and is proven in thousands of builds worldwide.

Before purchasing, assess your goals and budget. If you want a street-driven car that can run low 11-second quarter-mile times while still being comfortable for daily driving, the FP Red is hard to beat. However, if you demand 700+ whp, you’ll need a larger turbo. For everyone in between, the FP Red remains a benchmark upgrade that delivers the power gains enthusiasts talk about.

For further reading on tuning and real dyno graphs, check EvolutionM.net’s turbo forum or the Forced Performance community.