Chevy LT4

•High horsepower GM Gen V V8 and V6 direct injection engines including LT4, LT1, L86, L83 and LV3
•E85 conversions of GM Gen V V8 and V6 engines
•2014-2019 C7 Corvette (LT1)
•2015-2019 C7 Z06 Corvette (LT4)
•2016-2022 Camaro SS (LT1)
•2016-2019 CTS-V (LT4)
•2020-2024 CT5-V Black Wing (LT4)
•2017-2023 ZL1 Camaro (LT4)
•2014-2023 Silverado and Sierra with 4.3L LV3, 5.3L L83 and 6.2L L86 engines *Not compatible with 6mm shaft injectors
•2015-2023 Suburban, Tahoe, Yukon and Escalade with 5.3L L83 and 6.2L L86 engines *Not compatible with 6mm shaft injector

*Global B ECUs may require extra tuning on a case-by-case basis as we learn more about new models. We do not accept returns due to tuning difficulties, but we’re happy to assist with any technical inquiries.

Stanadyne/Katech Goliath High-Pressure Fuel Pump

The Goliath High-Pressure Fuel Pump, developed in collaboration with Stanadyne, represents a cutting-edge, modular solution engineered to address the fuel flow limitations of the stock Gen V LT mechanical fuel pump, enabling significantly higher power outputs.

Extensively tested on Katech’s in-house engine dynamometer, the Goliath Fuel Pump demonstrates exceptional performance, supporting over 1,500 horsepower on gasoline and 1,300 horsepower on E85 fuel. These results were achieved exclusively with direct injection (DI) on C16 fuel & turbos with additional testing yielding over 1,300 horsepower on full E85.

It is important to note that these figures reflect engine dyno results and are not directly representative of wheel horsepower (whp) due to drivetrain and supercharger losses. Turbocharged setups have achieved 1,100–1,150 whp, while supercharged configurations with a 2650 supercharger have reached up to 1,000 whp. These benchmarks serve as guidelines, with actual performance varying based on specific drivetrain and forced-induction setups.

• Direct Bolt-In for all GM Gen V LT engines
• 12mm Bore Size for enhanced fuel flow
• Up to 220 bar operating pressure
• Enhanced Spring Design for superior stability at high RPMs
• Improved Volumetric Efficiency over OEM and competing pumps
• Compatible with Cam Lifts Over 8.00mm

This pump provides a reliable, high-performance fueling solution for extreme builds, ensuring efficient fuel delivery and high RPM stability.

Lingenfelter Big Bore Direct Injection Fuel Pump for GM Gen V V8 Engines

The mechanical fuel pump flow has been a significant limitation in aftermarket power increases for GM direct injection V8 engines. The Lingenfelter Big Bore fuel pump addresses this by providing a substantial boost in fuel flow capacity over the stock LT1/L86 and LT4 pumps, expanding performance potential for these engines. With a 12.0 mm bore, the Big Bore pump offers over 30% more flow than the stock L86 & LT1 pumps and nearly 10% more than the LT4 pump. Paired with the LPE GT35 camshaft (7.85 mm fuel pump lobe), it delivers 40% more flow than a stock LT4 pump with a stock camshaft.

Key Specifications:

• Fuel Flow Capability: Supports over 1400 horsepower (0.52 BSFC) for turbocharged LT4 engines on VP Motorsports 109 fuel
• Bore Size: 12.0 mm
• DLC-Coated Bore and Piston for durability
• Compatibility: Works with stock LT1 and LT4 lobes and aftermarket higher-lift fuel pump lobes
  • Note: Some aftermarket higher-lift camshaft designs may require a lash cap for camshaft base circle compensation
  • Note: Certain aftermarket camshaft designs may require a higher load spring to maintain lifter control
• Hot Tested: 100% of pump assemblies are hot-tested for performance and functionality
• Individual Serial Numbers for traceability
• Max Recommended Operating Pressure: 15 MPa (2175 PSI)
• Low Side Fuel Pressure Requirement: 68 PSI or greater

Benefits:

• Increased Fuel Flow: Enables higher power levels without auxiliary fuel systems
• Stock Appearance
• E85 Compatibility
• Enhanced Flow Potential: Can be paired with higher-lift lobes for further flow increases

Fuel Pump Lobe Sizes:

• Stock LT1: 5.70 mm
• Stock LT4: 6.00 mm
• Lingenfelter GT35 L210287515: 7.85 mm
• Lingenfelter GT35 L210200215: 6.5 mm

These high-flow injectors are designed for performance builds demanding increased fuel delivery. They offer significant flow improvements over production LT1/L86 and LT4 injectors and are E85 compatible.

Specifications

LT4 +30% Injectors:

• Static Flow Rate: 23 g/sec (2000 cc/min @ 100 bar)
  • 50% more flow than production LT1/L86 injectors (15.3 g/sec)
  • 30% more flow than production LT4 injectors (17.7 g/sec)
• Max Pressure: 221 bar / 3200 psi

LT4 +50% Injectors:

• Static Flow Rate: 26.6 g/sec (2300 cc/min @ 100 bar)
  • 50% more flow than production LT4 injectors (17.7 g/sec)
• Max Pressure: 221 bar / 3200 psi

LT4 +70% Injectors:

• Static Flow Rate: 30.1 g/sec (2600 cc/min @ 100 bar)
  • 70% more flow than production LT4 injectors (17.7 g/sec)
• Max Pressure: 193 bar / 2800 psi

Note: Due to their large size, these injectors may not deliver stock-like drivability, especially on pump gas. Manual transmission cars may experience pressure overshoots after shifting, potentially causing misfires. Reducing pressure may be necessary.

Requirements

• Fuel System Upgrades: Requires upgraded low-pressure and high-pressure fuel pumps to reach full potential.

Power Potential and Recommended Combinations (LT4 +30%)

• 750–850 WHP on Full E85: Use with minimum +32% cam lobe on LT4 OEM HPFP (up to 3200 psi) or Katech Goliah/LPE HPFP.
• 1000 WHP on Blends or Race Gas (Turbo): Pair with minimum +32% cam lobe on LT4 OEM HPFP or Katech Goliah/LPE HPFP.
• 1000 WHP on Full E85 (TVS2650, Whipple, F1A): Requires +32% cam lobe on LT4 OEM HPFP or Katech Goliah/LPE HPFP and methanol injection, or with our XFP3200 belt-driven fuel pump.
• 1200 WHP on Race Gas (Turbo): Pair with our XFP3600 belt-driven fuel pump.

For Higher Output Applications

• XDI LT4 +70% Injectors are recommended for naturally aspirated (e.g., Nitro-Methane), low-RPM turbo applications, or centrifugal superchargers when combined with the LPE Big Bore pump or Katech Goliath.

Important: The LPE Big Bore + LT4 +70% injectors will not meet fueling demands for setups with a 2650 TVS or Whipple blower on E85. In these cases, we recommend our XFP3200 + 70% injectors or supplemental fueling (methanol, PFI) around peak torque.

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Tuning Support: Compatible with HP Tuners and standalone ECUs

All performance figures assume a fully supported setup.