XDI 70+ High Flow Injectors

As you know, High-Flowing Fuel Injectors are a major component to High HP builds on a Direct Injected platform like the LT4. Although there are several manufactures to choose from, you can always count on Griffin-Motorsports carrying the highest quality and most trusted products on the market. Which is why we only offer XDI Fuel Injectors. Built upon the foundation of the original GM LT4 injector, they provide a straightforward drop-in installation with minimal adjustments to existing ECU injector characteristics. Each injector undergoes meticulous testing at 100bar and 200bar on OEM equipment at XDI, ensuring precise flow matching within ±0.5% for consistent performance. Tested on fully instrumented engines for superior cylinder distribution and stability at pressures up to 2800psi, these injectors are fully E85 compatible, making them a versatile choice for performance enthusiasts.

Specifications

• Static Flow Rate: 30.1 g/sec (2600cc/min @ 100bar)

  • 70% more flow than production LT4 injectors (17.7 g/sec)

  • 2600 cc/min at 100 bar

  • 3700 cc/min at 200 bar

• Max Rail Pressure:193bar / 2800psi

• Fuel Compatibility: all known fuels, all Ethanol blends

• Electric Connector: Bosch EV1

• Driver Profile: XDI, tuning changes needed

• Tuning Support:  Standalone, HPT, MoTeC

• Idle Stability: 0.8 ms at 20 bar

• Static Flow Reference: 10 ms at 100 bar

• WOT Performance and Stability: 6 ms at 200 bar

• Tuning Support: Compatible with HP Tuners and standalone ECUs. Note: Due to the LT4 +70% Injectors 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: In order to get the most from these injectors, we suggest an upgraded low-pressure and high-pressure fuel pumps to reach the full potential of these injectors.

Power Potential and Recommended Combinations (LT4 +70%)

• 1,000 WHP on E50-E85: Use with minimum +32% cam lobe + High Flow HPFP + Dual Pump Low-Side.

• 1,400 WHP on Pump Gas: Use with minimum +32% cam lobe + High Flow HPFP + Dual Pump Low-Side.

Applications

•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

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 straight E85. In these cases, we recommend the XFP3200 + 70% injectors or supplemental fueling (methanol, PFI) around peak torque.

*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.

All performance figures are estimates only, assume a fully supported setup, and competent tuner who has experience tuning XDI products. Your results will vary. Final rail pressure should be determined by your tuner. Injectors are non-returnable.

Products ship direct from XDI.