[Katech_Jason]

Our first 100% XDI manufactured and tested DI-Injectors are designed for the new GM LT series engines. With a 45% increase in flow over stock LT4 injectors, these supply the required fuel flow for high horsepower applications without the need for auxiliary fuel systems. These injectors are based on the original GM LT4 injector, which makes them a perfect drop in solution. Most of the ECU Injector characteristics stay the same.
Every Injector gets tested at 100bar and 200bar on OEM testing equipment at XDI. Every set gets flow matched to within ±0.5% at 100bar and 200bar fuel pressure !!!

Testing on several fully instrumented engines (8x O2, 8x EGT) done by Katech Inc. has shown unequaled results in terms of cylinder distribution, repeatability and stability at pressures up to 3000psi. Tuning changes required are minimal, offsets and current driver parameters stay the same. The injectors are E85 compatible and have so far been tested up to 1308bhp on engine dyno and 1067whp on roller dyno (Ignite E90).

Maximum Fuel Pressure is 220bar / 3200psi.

Straight E85, 1067whp GDI only !!!

no meth, no PFI, no extra ECUs, no wiring, full control, full OBD Diagnostics.



High horsepower GM Gen V V8 and V6 direct injection engines including LT5, LT4, LT1, L86, L83 and LV3
E85 conversions of GM Gen V V8 and V6 engines

2014+ C7 Corvette LT1
2015+ C7 Z06 Corvette LT4
2019 C7 ZR1 Corvette LT5
2016+ Camaro SS LT1
2017+ Camaro ZL1 LT4
2016+ CTS-V LT4
2014+ Silverado and Sierra with 4.3L LV3, 5.3L L83 and 6.2L L86 engines
2015+ Suburban, Tahoe, Yukon and Escalade with 5.3L L83 and 6.2L L86 engines



rated static flow rate: 25.6g/sec at 10MPa
– 67% more flow than production LT1/L86 injectors (15.3g/sec)
– 45% more flow than production LT4 injectors (17.7g/sec)
– E85 compatible

maximum pressure:
200bar / 2900psi (tested rock solid on engine and roller dyno)
240bar / 3500psi (under perfect conditions, no pressure pulsations)

Tuning Support: HPT









https://store.katechengines.com/xdi-...s-45-p819.aspx

[Umbriel]

Are those horsepower numbers with the an LT4 low side and LT4 HPFP? Or would it need a bigger low side and the Lingenfelter HPFP?

[Katech_Jason]

Originally Posted by Umbriel

Are those horsepower numbers with the an LT4 low side and LT4 HPFP? Or would it need a bigger low side and the Lingenfelter HPFP?

Always with an upgraded low side pump. If you're in need of the +45% injectors you're at a power level that would require DI pump upgrades. We use our Xtreme DI belt driven secondary DI pump: https://store.katechengines.com/kate...stem-p631.aspx

At slightly less power, you can get away with the +30% injectors: https://store.katechengines.com/high...s-30-p561.aspx
For example, in my E85 C7 Z06 I have +30% injectors, 38% cam lobe with stock DI pump, and a low side fuel system. That made 760rwhp.

[Umbriel]

Originally Posted by Katech_Jason

Always with an upgraded low side pump. If you're in need of the +45% injectors you're at a power level that would require DI pump upgrades. We use our Xtreme DI belt driven secondary DI pump: https://store.katechengines.com/kate...stem-p631.aspx

At slightly less power, you can get away with the +30% injectors: https://store.katechengines.com/high...s-30-p561.aspx
For example, in my E85 C7 Z06 I have +30% injectors, 38% cam lobe with stock DI pump, and a low side fuel system. That made 760rwhp.

Thanks for the explanation on it, this DI fuel system is confusing coming from PI on the 4th gens.

[TJay74]

Originally Posted by Katech_Jason

Always with an upgraded low side pump. If you're in need of the +45% injectors you're at a power level that would require DI pump upgrades. We use our Xtreme DI belt driven secondary DI pump: https://store.katechengines.com/kate...stem-p631.aspx

At slightly less power, you can get away with the +30% injectors: https://store.katechengines.com/high...s-30-p561.aspx
For example, in my E85 C7 Z06 I have +30% injectors, 38% cam lobe with stock DI pump, and a low side fuel system. That made 760rwhp.

What are your thoughts for those of us with the LT4 LPFP, LT4 HPFP and the JMS voltage booster. Would the +30 or +45 injectors on the stock cam allow us to run more than the E50 some of us run now?

[Katech_Jason]

Originally Posted by TJay74

What are your thoughts for those of us with the LT4 LPFP, LT4 HPFP and the JMS voltage booster. Would the +30 or +45 injectors on the stock cam allow us to run more than the E50 some of us run now?

Too many variables to comment on that.

[oldman]

Originally Posted by TJay74

What are your thoughts for those of us with the LT4 LPFP, LT4 HPFP and the JMS voltage booster. Would the +30 or +45 injectors on the stock cam allow us to run more than the E50 some of us run now?

IMO, if you are at this range on the high side, then at a minimum you need
1) dual pumps inline like DSX or SkidMarks
or
2) two in-tank pumps

IMO there is a limit to the smallish stock pump and cast the plastic line, no matter how much voltage is supplied.

[KingLT1]

Originally Posted by TJay74

What are your thoughts for those of us with the LT4 LPFP, LT4 HPFP and the JMS voltage booster. Would the +30 or +45 injectors on the stock cam allow us to run more than the E50 some of us run now?

Ryne Cunningham went almost 800whp on E70 with +30 injectors, LPE DI pump, cam, aux low side with a Whipple A10 ZL1.