Best Fuel Injector Options For The Zr-1 1991

If you're looking to replace the fuel injectors in your 1991 ZR-1, there are a few options available to you.

You could opt for the more expensive RC injectors, or go for a more cost-effective alternative such as the Accel, Bosch, or GM injectors.

For example, Summit Racing offers a range of fuel injectors for the Chevrolet Corvette ZR1, including the Injector Dynamics ID1050x Fuel Injectors, which are advertised as having a flow rate of 1065.0cc/min.

Another option is to purchase a Bosch Fuel Injector Set for the Corvette ZR1 1990-92, which includes both primary and secondary injectors. These have been remanufactured and are guaranteed to fit.

It is also worth noting that some people have recommended using o-rings, filters, and seals with your new injectors to ensure a secure fit and prevent leaks.

Fuel injector options for the 1991 ZR-1

The 1991 ZR-1 is a high-performance sports car and, as such, requires regular maintenance to keep it in top condition. One of the key components that may need replacing over time is the fuel injectors. Here are some options for fuel injectors for the 1991 ZR-1:

Bosch Fuel Injectors

Bosch is a well-known and trusted brand when it comes to automotive parts, and they offer a set of fuel injectors that are compatible with the 1990-1992 Corvette ZR-1. These injectors are remanufactured and rebuilt in-house, ensuring quality and performance. They come with new replaceable parts, including o-rings, filters, and seals, making them a plug-and-play solution. Bosch fuel injectors are dynamically and statically flow tested and are known for their accuracy and reliability.

Accel Fuel Injectors

Accel offers fuel injectors specifically designed for the 1991 ZR-1. Their injectors are made of stainless steel, ensuring durability and corrosion resistance. Accel fuel injectors are a popular choice among ZR-1 owners, with many reporting improved performance and longevity. It is recommended to use part number 150821 from Accel, which can be purchased individually or in packs of eight. Keep in mind that a plastic nub may need to be removed from half of the injectors using a Dremel tool.

RC Engineering Fuel Injectors

RC Engineering is another popular choice for fuel injectors among ZR-1 owners. Their injectors are made with stainless steel inserts, preventing rust and ensuring long-term reliability. RC Engineering fuel injectors are known for their quality and performance, offering a cost-effective alternative to OEM options. They are designed to withstand modern fuel additives, making them a good choice for those who want peace of mind.

Delphi Fuel Injectors

Delphi offers fuel injectors that are compatible with the 1991 ZR-1. These injectors are resistant to ethanol and are known for their quality and performance. Delphi fuel injectors are a good option for those looking for a direct drop-in replacement without any modifications. They are also visually indistinguishable from the original equipment, making them ideal for those concerned about aesthetics.

OEM Fuel Injectors

For those who want to stick with original equipment manufacturer (OEM) parts, there are options available as well. General Motors (GM) offers fuel injectors specifically designed for the ZR-1. However, it is important to note that these injectors may not tolerate modern fuel additives, so it is recommended to explore other options if possible. Bill at P&G typically offers the best prices on OEM injectors, and he can be contacted for more information.

When replacing fuel injectors, it is important to consider the flow rate, compatibility, and durability. It is also recommended to consult with a trusted mechanic or tuner to ensure that you make the right choice for your specific vehicle and usage. Regular maintenance and timely replacement of fuel injectors will help keep your 1991 ZR-1 running smoothly and reliably for years to come.

Fuel injector replacement cost

The cost of replacing fuel injectors can vary depending on several factors, such as the make and model of your vehicle, the severity of the issue, and your location. On average, you can expect to pay anywhere from $300 to $900 per injector, with some injectors costing several hundred dollars each. The cost of parts and labour for the replacement can range from $150 to $400.

For example, the cost of replacing all four fuel injectors on a 2019 Toyota Yaris was quoted at $2150+tax, although some forum users suggested that this was too expensive and that the parts could be sourced for much less.

If you are looking for replacement fuel injectors for a 1991 ZR-1, forum users have suggested several options, including:

• Bosch Fuel Injectors: A set of 16 remanufactured and rebuilt injectors, including o-rings, filters, and seals, can be purchased for the ZR1 Chevy Corvette 1990-1992 LT5.
• RC injectors: These are made with stainless steel inserts, so they won't rust like the OEM style.
• Accel injectors: These are the cheapest option, according to one forum user.
• FIC injectors: Recommended by several forum users, who suggest contacting Jon Banner for more information.
• GM injectors: The OEM option, although some forum users suggest these cannot tolerate modern-day fuel additives.
• Multec look-alikes: According to one forum user, these are made by the same manufacturer as the RC injectors but are a more affordable option.

Fuel injector maintenance

Overview

Fuel injectors are responsible for pressurising and pumping fuel through an electronically controlled opening that sprays the fuel into the cylinder, allowing the fuel to burn more efficiently and evenly. Over time, burning fuel leaves carbon deposits that build up on the fuel injectors, which can lead to a decline in performance and fuel economy. Therefore, it is important to regularly clean and maintain your fuel injectors.

When to Clean Your Fuel Injectors

It is recommended to get your fuel injectors cleaned after every 60,000 to 90,000 miles. However, if you notice a sharp decline in fuel economy, a lack of power in your car, or a sluggish feeling when you accelerate, it could be an indication that your fuel injectors need cleaning. Other signs include poor overall performance and the Check Engine Light turning on.

Cleaning Methods

There are two main ways to clean fuel injectors: with or without removal from the engine.

Cleaning with Removal

The best way to thoroughly clean fuel injectors is to remove them from the engine. Here are the general steps:

• Remove the fuel injectors and disconnect the fuel supply and fuel rails.
• Take off the rubber o-ring from the fuel rail side of the injector and replace it with a new one.
• Attach a rubber hose to the opening using hose clamps to prevent spills.
• Connect one side of an electrical lead to the injectors and the other side to the positive terminal of the battery.
• Disconnect the hose from the rail side and attach it to the outflow side to flush out any remaining deposits.
• Reattach the new o-ring and insert the fuel injector back into the engine.

Cleaning without Removal

If you prefer not to remove the fuel injectors, you can use a fuel injector cleaning kit or a gasoline additive. However, these methods may be less effective as the cleaners are diluted in the fuel tank and only flow through the injectors in one direction. When using a cleaning kit, follow the manufacturer's instructions, as the specific steps may vary.

Replacement Options

If cleaning is not sufficient or you prefer to replace your fuel injectors, there are several options available for the 1991 ZR-1. Some popular choices include:

• Bosch Fuel Injectors: A set of 16 remanufactured and rebuilt primary and secondary fuel injectors with new o-rings, filters, and seals.
• FIC Injectors: Recommended for those seeking OEM-like injectors.
• RC Injectors: Made with stainless steel inserts to prevent rust.
• Accel Injectors: A more cost-effective alternative.
• GM Injectors: The OEM option, but may not be suitable due to issues with modern-day fuel additives.

Fuel injector installation

Fuel injectors are designed to deliver fuel into the engine’s cylinders at the precise moment and in the correct quantity, ensuring optimal combustion. They are built to be incredibly long-lasting, but sometimes they need to be replaced.

Preparation

Before installing your new fuel injectors, it is important to take safety precautions. Fuel is flammable, so great care must be taken when working on the fuel injection system. Disconnect the battery and let the engine cool completely. Wear safety glasses and gloves, and avoid getting fuel on your skin. Keep a fire extinguisher within reach. Relieve the fuel pressure before removing any components to prevent unexpected fuel spray. Work in a clean area to prevent dirt and debris from contaminating your new fuel injector and fuel system.

Step-by-Step Fuel Injector Installation

• Access the fuel injectors by removing any parts that may be in the way, such as the air filter box, intake plenum, engine covers, and wiring harnesses.
• Detach the fuel rail and remove the old injectors. You may need to wiggle the fuel rail free from the injectors. Gently wiggle and pull the injector out of its mounting.
• Inspect and clean the injector ports. This will help the new injector seal properly and prevent dirt and debris from entering the engine.
• Lubricate the new fuel injector O-rings with clean engine oil, then install them. Attach the fuel rail afterward.
• Re-install and connect any electrical items or parts that you removed during disassembly, ensuring each part is fully seated and secured.

Post-Replacement Checks

After installing the new fuel injectors, run the engine and inspect for leaks from the fuel system. If the car doesn’t start right away, allow it to crank for a few seconds to pressurize the system, and check that any fuses and relays are installed and working. If you’re still experiencing issues, it’s recommended to have a professional mechanic take a look and diagnose the problem.

Fuel Injector Options for ZR-1 1991

There are several options for replacement fuel injectors for the ZR-1 1991. Many people opt for the GM injectors, or go with RC's, Accel's, or Bosch as cost-effective alternatives. You can also contact Bill at P&G for typically the best prices on the OEM option.

Fuel injector ratings

Fuel injectors are rated by the amount of fuel, in pounds, that they are able to flow per hour at maximum duty cycle. For example, a 19-pound per hour (Lb/Hr) injector can flow 19 pounds of fuel in one hour at a 100% duty cycle and 43.5 psi of fuel pressure.

The duty cycle of a fuel injector refers to the amount of time the injector is open or spraying fuel. An injector duty cycle of 80-85% is used as a baseline for calculations, allowing the computer to adjust the amount of fuel delivered as needed.

It is important to note that fuel injectors are also rated at specific fuel pressures, which may vary between manufacturers. For instance, Ford Racing rates their injectors at a fuel pressure of 39.15 PSI, while others may be rated at 43 PSI.

Additionally, fuel injectors are classified as either high-impedance or low-impedance. High-impedance injectors typically range from 11 to 16 ohms of impedance and are used on engines that require less fuel flow, such as non-turbocharged or non-supercharged engines. On the other hand, low-impedance injectors have lower impedance, usually ranging from 0.7 to 5 ohms, and are preferred for racing or ultra-high-performance use due to their faster response time.

When choosing replacement fuel injectors, it is recommended to consider the flow rate, duty cycle, fuel pressure, and impedance to ensure optimal performance and compatibility with your vehicle's engine.

Frequently asked questions