Katech Goliath + XDI Bundle

When it comes to unlocking the true potential of your Gen V LT engine, fuel flow limitations can be a major roadblock. Even with larger cam fuel lobe, and a low side boost-a-pump, it doesn't take long before the stock mechanical fuel pump, injectors and low-side pump struggle to keep up with the fueling needs from ported blowers, more boost, and E85. Although the benefits of Direct Injection are clear, taking your LT4 from a stock 550rwhp to the all to common 850rwhp + requires an investment in fuel volume availability. Luckily, the bright minds at Katech and XDI have created some turn-key solutions to help us meet our goals, and have generated power levels over 1,500 horsepower on gasoline and 1,300 horsepower on E85 in Katech’s rigorous in-house testing using these parts combinations. Bundling also helps us pass on up to a $1,265 savings when purchased together, allowing you to invest more into tuning, tires, and other support mods!

Katech Goliath High Pressure Fuel Pump;

The Goliath pump is more than just a Katech product; it’s the result of a powerhouse partnership with Stanadyne. As a globally recognized leader in fuel system technology, Stanadyne brought its vast expertise to the table to make this project a success. The collaboration ensured the Goliath would meet the highest standards of quality, reliability, and performance. This pump isn’t just about making power; it’s about consistency and dependability when you need it most.

The Goliath pump boasts a 12mm bore size and up to 220-bar operating pressure, making it the perfect match for aggressive higher HP builds. Its improved spring design ensures performance even at extreme RPMs. Unlike OEM and competing pumps that can struggle to keep up, the Goliath’s enhanced volumetric efficiency means it can keep up with cam lifts over 8mm. Whether you’re on the track or tearing up the streets, the Goliath has your back.

Benefits;
-Direct bolt in for all GM Gen. V LT Engines.
-Larger 12mm bore size for 10% added volume.
-Reliability up to 220bar operating pressure.
-Improved spring design for superior high RPM stability.
-Improved Volumetric efficiency over OEM and competing pumps.
-Capable of over 8.00mm cam lift.

XDI Fuel 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 3000psi. These injectors are also fully E85 compatible, making them a versatile choice for performance enthusiasts.

XDI 30+ Injector Specifications;

• 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 Rail Pressure: 221 bar / 3000 psi

• 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

XDI 50+ Injector Specifications;

• Static Flow Rate: 26.6 g/sec (2300cc/min @ 100bar)

  • 73% more flow than production LT1/L86 injectors (15.3 g/sec)

  • 50% more flow than production LT4 injectors (17.7 g/sec)

• Max Rail Pressure: 221 bar / 3000 psi

• 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

XDI 70+ Injector 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: Manual cars may experience significant pressure overshoots after shifting, which can cause misfires. Reducing pressure may be necessary in these cases.

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. Planning for more than 1,000rwhp? Then ask us how we can help set you up with a TooHigh PSI Port System to supplement your OEM Di System.

*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.

Injectors may ship direct from XDI.

What YOU will need to provide:

• Patience and attention to detail for installation... or, someone like that, who you trust with your beloved, adorned, magnificent, earth shaking, alarm sounding LT4 powered beast! If you are doing this DIY (which is not that bad) be sure to get an extra set of hands. These superchargers are alot heavier than some imagine.

• We strongly suggest upgrading your cooling system while the blower is out of the car because alot of the labor needed to upgrade is already done with the coolant system bleed and blower out of the car. Email us at info@griffin-motorsports.com to discuss your particular set up if you need help, or want to discuss options.

• Although many people have had luck reusing the GM supercharger bolts, Fuel Feed Pipe, and Fuel Crossover Pipe, we strongly suggest you add these items to your cart, as these are ALL one time use only parts.

• This package will require tuning. Email us at info@griffin-motorsports.com if you need a recommendation on a local or remote tuner.