Overview of the Upgrade

The 2018 Camaro SS with the LT1 engine is a formidable platform, but its factory fuel system reaches its limit once you start adding forced induction, nitrous, or a aggressive cam and heads setup. The stock 28 lb/hr (approx. 295cc) injectors can support roughly 550–600 wheel horsepower on E85 before duty cycles become dangerously high. DeatschWerks 2000cc injectors are a popular solution for owners who want to push well beyond that threshold. These high-impedance injectors are designed to handle massive fuel flow while maintaining excellent idle quality and throttle response when properly tuned. This article covers the installation process, realistic costs, supporting modifications required, and the performance gains you can expect on a 2018 Camaro SS.

Why Choose DeatschWerks 2000cc Injectors?

DeatschWerks has built a strong reputation in the aftermarket fuel system world, offering injectors that are flow-matched and tested. The 2000cc (approx. 190 lb/hr at 43.5 psi) injectors are capable of supporting over 1,000 wheel horsepower on gasoline and up to 850–900 wheel horsepower on E85, depending on fuel pressure and boost levels. Key benefits include:

  • High flow rate: Enough headroom for supercharged, turbocharged, or nitrous builds.
  • Precision flow matching: Each set is tested and matched to within 1% to ensure balanced fueling across all cylinders.
  • Stainless steel construction: Resistant to corrosion from ethanol blends.
  • Direct fit for LT1/LT4/LT2 platforms: Compatible with factory fuel rails and connectors, simplifying installation.
  • High-impedance design: Works with the stock ECU and aftermarket controllers without the need for a dedicated injector driver box.

Compared to smaller injectors like ID1050x or FIC 1000cc, the DW2000s offer more capacity for those who plan to run a high-boost supercharger or a large turbocharger with E85. They are also a common choice for flex-fuel conversions because their ethanol compatibility makes them reliable for sustained high-ethanol-content use.

Installation Process: Detailed Steps

Installing the DW2000cc injectors on a 2018 Camaro SS requires intermediate mechanical skill. The LT1 intake manifold is plastic and can be tricky to remove without breaking tabs. Plan for 4–6 hours if you are doing the job yourself for the first time; a professional shop can complete it in 2–3 hours plus tuning time.

Tools and Supplies Needed

  • Metric socket set (10mm, 13mm, 15mm, E10 Torx for manifold bolts)
  • Flathead screwdriver and trim removal tools
  • Fuel line disconnect tool (3/8″ and 5/16″ for quick-connect fittings)
  • Torque wrench (in-lb range for fuel rail bolts)
  • Engine oil or assembly lube for injector O-rings
  • Shop towels and safety glasses
  • Optional: Fuel pressure gauge to verify no leaks after installation

Step-by-Step Installation

  1. Disconnect battery: Remove the negative terminal to prevent accidental fuel pump activation and protect the ECU.
  2. Remove engine cover and air intake: Unclip the engine beauty cover and remove the air intake tube from the throttle body.
  3. Relieve fuel pressure: The LT1 system retains pressure after shutdown. Locate the Schrader valve on the fuel rail (passenger side, near the front) and depress it with a small tool while wrapping a rag around it to catch fuel. Alternatively, pull the fuel pump fuse and crank the engine briefly.
  4. Disconnect fuel lines: Use the fuel line disconnect tool to separate the feed and return lines from the fuel rail. Expect a small amount of residual fuel.
  5. Remove intake manifold: Disconnect all electrical connectors (MAP sensor, purge solenoid, etc.). Unbolt the intake manifold using a 10mm socket (counterclockwise on some bolts). Carefully lift the manifold straight up to avoid damaging the runners. Be mindful of the throttle body coolant lines if still present.
  6. Access fuel rail: The fuel rail sits on top of the intake ports. Remove the two 10mm bolts securing the rail (one on each side). Gently wiggle the rail upward to free the injectors from their bores. Keep the rail horizontal to avoid bending the fuel line nibs.
  7. Remove old injectors: Unclip the injector electrical connectors. Pull each injector straight out of the rail. Clean any debris from the rail injector pockets and the intake manifold bores.
  8. Install new DW2000 injectors: Lubricate the new O-rings with clean engine oil. Insert each injector into the fuel rail, ensuring the electrical connector orientation matches the harness. Press the rail with injectors into the intake manifold bores. Torque the rail bolts to 7 lb-ft (84 in-lb).
  9. Reassemble in reverse order: Reinstall the intake manifold with a new gasket (recommended). Torque manifold bolts to 89 in-lb in a cross pattern. Reconnect fuel lines, throttle body, sensors, and intake tube.
  10. Reconnect battery and prime fuel system: Turn the key to the ON position without cranking for 5 seconds, then OFF. Repeat twice to pressurize the system. Inspect for leaks at the injector seals and fuel line connections.
  11. Start engine and check for leaks: Crank the engine with fuel pressure present. It may take a few seconds longer to start as the ECU adapts. Listen for any ticking sounds indicating a leaking injector. Check fuel pressure gauge if available.

Tuning and Calibration Required

Installing DW2000cc injectors without a tune will cause the engine to run extremely rich (if you can start it at all). The stock ECU fuel tables cannot compensate for injectors that flow nearly 7 times the stock rate. You will need a custom tune using HP Tuners, EFI Live (not common for GM), or a standalone ECU like Holley Terminator X if you are running a full aftermarket setup.

The tuner must adjust the injector flow rate table, short and long pulse width adder tables, and the injector voltage offset table. For E85 operation, additional tables for ethanol content and stoichiometric AFR must be configured. Expect to pay $300–$600 for a remote tune (email-based, using HP Tuners) or $500–$1,000 for a dyno tune from a reputable shop like HP Junky or Katech.

Important: If you are running a supercharger, the tuner must also account for boost referenced fuel pressure. Many forced induction builds use a return-style fuel system with a boost reference regulator, which requires recalculating the injector flow characteristics at varying fuel pressures.

Supporting Modifications

Simply bolting on 2000cc injectors will not yield performance gains on an otherwise stock engine. The injectors only deliver fuel; the engine must be able to consume it. Here are the typical supporting modifications that justify 2000cc injectors:

  • Forced induction: Supercharger (e.g., Magnuson 2300/2650, Whipple 2.9L) or turbocharger kit. Boost levels above 10 psi on pump gas or 15 psi on E85 will demand injectors this large.
  • High-flow fuel pump: The stock LT1 fuel pump cannot keep up with 2000cc injectors at high horsepower. You will need a dual in-tank pump setup (e.g., Fore Innovations, AEM 50-1200) or a large external pump with a return-style system.
  • E85 conversion: Ethanol requires approximately 30% more fuel volume than gasoline. If you plan to run E85, these injectors are a great match for 800–900 wheel horsepower builds.
  • Camshaft and heads: A mild to aggressive cam (e.g., 231/239 .617”) with ported LT1 heads will increase airflow, requiring more fuel. Injector capacity becomes critical especially at high RPM.
  • Intake and exhaust: Full 3-inch exhaust and a cold air intake are minimal but help the engine breathe.

Without these mods, a stock Camaro SS with only injectors and a tune will see no peak horsepower gain. The stock LT1 throttle body and intake manifold will restrict airflow. However, the injectors do allow you to run E85, which might yield a modest 15–25 hp gain due to increased octane and cooler combustion.

Cost Breakdown

Total cost varies dramatically based on whether you do the work yourself, the tuning method, and whether you need a complete fuel system upgrade. Below is a realistic estimate for a supercharged application:

Item Estimated Cost (USD)
DeatschWerks 2000cc injectors (set of 8) $680 – $840
Injector O-ring set and fuel rail spacers (if needed) $25 – $60
Intake manifold gasket $35 – $60
Professional installation (optional, 3 hours at $120/hr) $360
Custom tune (remote or dyno) $350 – $800
High-flow fuel pump system (if not already installed) $600 – $1,500
HP Tuners MPVI2 (if you tune yourself and don't own one) $499
Total (DIY with tune, no pump upgrade) $1,090 – $1,760
Total (pro install, pump, dyno tune) $1,875 – $3,320

Note that the biggest variable is the fuel pump system. Many owners already have a pump upgrade for their supercharger. If you are building from stock, expect to spend around $2,500 to do injectors, pump, and tune properly.

Dyno-Tested Performance Gains

Real-world dyno results for a properly tuned 2018 Camaro SS with DW2000cc injectors and supporting modifications show significant gains. Here are two common scenarios:

Scenario A: Naturally Aspirated + E85 + Cam + Heads

A bolt-on LT1 with a stage 3 camshaft, ported heads, long tube headers, and cold air intake typically makes 500–530 wheel horsepower on 93 octane. Switching to E85 and tuning for the DW2000 injectors (with an appropriate fuel pump) can push that to 550–580 whp. The injectors themselves do not add power; the E85 does because it provides a 20% increase in effective octane, allowing more timing advance and cooler intake charge. However, the 2000cc injectors are necessary to flow enough E85. Dyno sheets from shops like Ryan's Automotive Service show +30–50 whp gains on E85 compared to pump gas, with no change in torque curve shape.

Scenario B: Supercharged 7 psi + E85

A Magnuson 2300 supercharger at 7 psi on 93 octane yields about 620–650 whp. With DW2000 injectors, an upgraded fuel system, and E85, the same setup often jumps to 700–730 whp. The extra octane and injector capacity allow the tuner to increase boost to 9–10 psi safely. A well-known example from JRE Performance shows a 2016 Camaro SS with a Whipple 2.9L and DW2000 injectors making 806 whp on E85 with 11 psi. In that case, the injectors were part of a comprehensive fuel system including Fore triple-pump hat.

Important caveat: Do not expect 2000cc injectors to add horsepower on a stock engine. Their benefit is realized only when the engine can demand that fuel flow. If you are not planning on forced induction or a cam/E85 combo, these injectors will cause idle and low-load drivability issues due to their large size; the minimum pulse width may exceed the fuel requirement at idle. In that case, consider smaller injectors like the DW 300cc or 850cc.

Maintenance and Longevity

DeatschWerks injectors are built to last, but some considerations apply:

  • Ethanol care: If you run E85 regularly, change the oil more frequently (every 2,000–3,000 miles) because ethanol can contaminate the oil. Also, use a fuel stabilizer if the car sits for weeks.
  • O-ring replacement: With each injector removal, replace the O-rings. DeatschWerks includes spare O-rings; purchase additional sets for $15–$20.
  • Fuel filter: Keep a high-quality fuel filter (like a WIX or a billet inline filter) to avoid debris clogging the injector nozzles.
  • Cleaning: After 30,000–40,000 miles, especially with ethanol, have the injectors professionally cleaned and flow-tested. Services like RC Fuel Injection can clean and re-match the set.

Frequently Asked Questions

Will these injectors fit the stock 2018 Camaro SS fuel rail?

Yes, the DW2000cc injectors are designed as a direct replacement for the stock LT1 injectors. They have the same physical dimensions, electrical connector (USCAR), and O-ring sizes. However, with very high flow, some customers have reported that the fuel rail clips may not snap on as tightly due to slight variations in the injection body. DeatschWerks includes new retaining clips. If your clips are worn, purchase a set of Bosch EV14 clips.

Do I need a return-style fuel system?

For naturally aspirated or mild forced induction (up to 700 whp on pump gas, 650 whp on E85), you can retain the stock returnless fuel system by upgrading the in-tank pump and adding a boost reference regulator on the return side (if running E85). For power levels above 750 whp or high boost with E85, a full return-style system with external pump and regulator is recommended. Consult your tuner.

Can I run these injectors on a stock fuel pump?

No. The stock LT1 fuel pump delivers about 120 L/hr at 58 psi. With 2000cc injectors at 80% duty cycle and 4.5 bar fuel pressure, all eight injectors flow about 1,480 L/hr (roughly 390 gallons per hour). You will need a fuel pump capable of at minimum 250 L/hr for a 600 whp build on gasoline, and 350+ L/hr for E85. Upgraded pump options include the DeatschWerks DW300c (340 L/hr) or a dual pump configuration.

What are the idle quality and cold start behavior like?

With a proper tune, the DW2000 injectors can idle nearly as well as stock. The LT1 ECU has good resolution for small pulse widths. However, on E85, cold starts may be slightly rough due to the higher fuel volume needed. Most tuners compensate by adding cranking fuel enrichment and adjusting the startup airflow. Expect a slightly lumpier idle if you have a camshaft, but the injectors themselves do not cause rougher idle than stock.

Conclusion

Installing DeatschWerks 2000cc fuel injectors on a 2018 Camaro SS is a logical step for any enthusiast building a high-horsepower forced induction or E85 setup. While the injectors alone provide no power gain, they unlock the ability to safely fuel an engine that makes 700+ wheel horsepower. The total investment, including injector cost, professional installation, a custom tune, and a fuel pump upgrade, ranges from approximately $2,000 to $3,500. The result is a reliable, powerful vehicle that can run on high-octane ethanol and deliver a thrilling driving experience. Always work with a reputable tuner and ensure your fuel system is matched to the injectors’ flow capacity.