Fuel injectors
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Joined: Dec 2015
Posts: 64
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Fuel injectors
Afternoon fellas,
My car is about to hit 100k and I was wanting to replace the injectors. I have a few bolt ons, Vararam caí and power duct, kooks headers, mid pipe and bb bullet axleback. My question is will these injectors be better than stock? Thanks in advance.
https://www.corvettemods.com/C5-Corv...wmPD_BwE#tab-4
My car is about to hit 100k and I was wanting to replace the injectors. I have a few bolt ons, Vararam caí and power duct, kooks headers, mid pipe and bb bullet axleback. My question is will these injectors be better than stock? Thanks in advance.
https://www.corvettemods.com/C5-Corv...wmPD_BwE#tab-4
Race Director
Joined: May 2003
Posts: 14,137
Likes: 2,984
From: Iowa
St. Jude Donor '03 thru '26
I'm curious on this. Does one need to replace their fuel injectors on a case of mileage or time? I never heard that. I've put over 250,000 miles on vehicles and never replaced injectors. 
Banned Scam/Spammer
Joined: May 2007
Posts: 15,685
Likes: 1,330
From: Machineguns, because I don’t compromise
The injectors were junk past 120k miles. Engine would stumble/break up hard approaching 5k+ rpm and the hotter the engine bay was the worse it got.
You'd think it was opti-spark, change it. MAP sensor. Mass air. Hard stumble still there. Then over time you walk into a Corvette-only repair shop and see a mechanic changing LT1 fuel injectors. You ask him why and he says they're junk after 100K miles.
Then you finally know what your ever-frustrating problem was. Too bad you sold the car already.
Le Mans Master
Joined: Mar 2004
Posts: 8,700
Likes: 298
From: Ft. Lauderdale Fl
Afternoon fellas,
My car is about to hit 100k and I was wanting to replace the injectors. I have a few bolt ons, Vararam caí and power duct, kooks headers, mid pipe and bb bullet axleback. My question is will these injectors be better than stock? Thanks in advance.
https://www.corvettemods.com/C5-Corv...wmPD_BwE#tab-4
My car is about to hit 100k and I was wanting to replace the injectors. I have a few bolt ons, Vararam caí and power duct, kooks headers, mid pipe and bb bullet axleback. My question is will these injectors be better than stock? Thanks in advance.
https://www.corvettemods.com/C5-Corv...wmPD_BwE#tab-4
Acct Suspended APR 2026 by request
Joined: Dec 2010
Posts: 10,367
Likes: 1,272
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
I didn't even see a brand on them either, who knows what they are... I would just leave them alone for now and when/if you add enough power then you can replace them when they need to be replaced... run good fuel and you should be fine in my opinion
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Melting Slicks
Joined: Feb 2001
Posts: 2,803
Likes: 358
From: Northville, MI
Using top tier fuel and occasional fuel injector cleaner is all you need. If the mileage gets past 80K and you feel it is loosing its zip, then you can add cleaner into the combustion chamber using one of the vacuum tubes. Do this on a back road because after it sits and you restart the engine, you will help kill all the flying insect in back of the Corvette. The time to increase the size of the injectors is when you do a scan/log run and the injectors greatly exceed the 80% duty cycle. On a LS1 with just headers and a cold air intake is usually is not needed.
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Joined: Sep 2001
Posts: 3,665
Likes: 341
You have to be careful about what you replace them with. The factory fuel injector has pencil stream to it and the models in the computer are based on this. The factory injector also has filter in it that can get clogged up. We offer a injector cleaning service that will clean the inside of the injector, replace the o-rings and the filter basket in each one. We also flow it to see if they are flowing what they are supposed to. You only really need to replace an injector if there is a coil issue with it or you are needing to go up in size.