Hello,

Car is 30 years old at this point, I'd like to replace the fuel system to help assure continuing reliability.

Looking at fuel injectors. What do I purchase to replace the set of 8 OEM injectors?
I know I need 24# injectors, and I've read the impedance needs to be right as well.

I'm looking at the big auction site and it is confusing. Is part number 17095004 correct?
I see sets of rebuilt OEM injectors being sold, saying they have been cleaned and tested and flow matched for under $70 for a set of 8. They look like stock injectors in the photos. Is this a solid option, or a bad idea? Is there a different route I should be going? Is there a good option for a new part that will work as well as OEM in my car?

 

I've been recommending Bosch III injectors from Fuel Injector Connection.

https://fuelinjectorconnection.com/

I believe he sells both new and rebuilt. Also rebuilds the stock GM Multec injectors. Problem is not always in stock. He has some great videos comparing the various injectors used in the LT1, including a counterfeit:

https://fuelinjectorconnection.com/pages/videos

 

Thanks for the recommendation, it's just outside my budget for this to buy brand new. I'm going to try the rebuilt stock route.

I just ordered a set of 8 of these off the big auction site for $69.49. I'll post my results. Wish me luck? It's a gamble!


All injectors are serviced as stated below:
OHM Tested for electrical shorts
Disassembled and externally cleaned
Checked for any major cosmetic damage
Internally cleaned via numerous ultrasonic baths using special non-hazardous solutions.
Back-flushed to remove any internal debris (multi-step process)
Pressure/Leak tested, Spray/Flow Tested
Flow matched using the very latest in fuel injection calibrating technology
Re-assembled with new high quality components (seals, filters etc..)
Carefully packaged to ensure safe arrival



Specification：
Perfect match for the car, and easy installation
Through the annular clearance of fuel injection nozzle, it is conducive to the full combustion of fuel
Made of High-quality material for long-lasting durability
Stable characteristics, professional performance and high reliability
Please compare your original part with our product display pictures, make sure they have the same Part number,same pattern and shape

Part Number： 17095004,17121068



Package Included: 8x Fuel Injectors



Fitment:
For 1996-94 BUICK ROADMASTER V8 5.7
For 1996-94 CADILLAC FLEETWOOD V8 5.7
For 1997-94 CHEVROLET CAMARO V8 5.7
For 1996-94 CHEVROLET CAPRICE V8 5.7
For 1995-94 CHEVROLET CORVETTE V8 5.7
For 1996 CHEVROLET CORVETTE V8 5.7
For 1996-94 CHEVROLET IMPALA SS V8 5.7
For 1997-94 PONTIAC FIREBIRD V8 5.7

 

What I received from the seller was not what was pictured in the auction listing. I received some new unbranded aftermarket injectors.
Just for grins I tried them in the car. It started and died several times before I could keep it running with my foot. After a while it figured out an idle. If I gave it any throttle at all it would fall on its face.
I'm returning them.

I found a guy with a set of OEM RP injectors he had recently cleaned and tested for leaks on Facebook in the LT1 swap meet group.

 

Unfortunately there are a huge amount of Chinese counterfeit injectors being sold on eBay, Amazon, etc. That's why it's best to deal with a reliable source like FIC, Racetronix, etc.. While real ones seem expensive, they are the next-to-final step in the combustion ( = HP ) process. A faulty set of injectors can easily “undo” the promise of a lot of very expensive engine modifications.

 

Which LT1 engine do you have? Is it stock or modified? Tell us more about your car.

What Bosch (assuming that's what you bought) type of injectors and flow rating did you install? Did you consider the type III?

ADMINISTRATOR

 

I bought bosch iv injectors from https://www.cspinjectors.com/ plug & play flowed at 3 bar 24 lb

 

Not familiar with those. What are the changes/features of the Gen IV?

 

I found this information online as im not entirely sure.
Bosch Gen4 vs. Bosch III Injectors - CorvetteForum - Chevrolet Corvette Forum Discussion

The Bosch Gen 4 injectors have two primary benefits:
1. They maintain a finer atomization in the larger injectors (beyond 24 lbs); the Gen 3 and Gen 4 are essentially identical in the smaller injectors
2. They are way faster with shorter response times than the Gen 3s; this is particularly important when you get into the larger injectors that have had the holes enlarged (that reduces the response times) or when you're running @ more than 3 bar pressures as the increase in pressure further reduces the response times