L98 Fuel Injectors
Intermediate
Joined: Oct 2023
Posts: 33
Likes: 0
Hi I bought some ACDELCO 2173454 Gold, for a 1987 C4 Corvette. Rockauto says they fit but I wanted to confirm that. They're slightly longer than the originals. Has anyone used these before?
Last edited by mmadsen124; Nov 20, 2023 at 10:23 PM.
Racer
Joined: Jul 2022
Posts: 494
Likes: 162
From: Wilmington,Delaware
Good god they are expensive. How many did you buy? If it were me, id send them back and buy a set of Bosch III from Fuel Injection Connection or South Bay Fuel Injectors.
Intermediate
Joined: Oct 2023
Posts: 33
Likes: 0
8 of them, guess i’ll consider sending them back. I forgot about the bosch III. Everyone on here seems to love them.
Racer
Joined: Jul 2022
Posts: 494
Likes: 162
From: Wilmington,Delaware
22lb/hr Corvette C4 L98 Bosch D3 TPi (southbayfuelinjectors.com)
Racer
Joined: Jul 2022
Posts: 494
Likes: 162
From: Wilmington,Delaware
I was watching a video on Youtube where a guy was replacing his injectors. He had the same problem with the same bolt. Probably is a good idea if you're gonna be in there again. Which is probable at some point..
Btw. Now that you've replaced your fuel tank and likely already filled it, the next time you fill up, can you make mental note to see how long and strong of a woosh sound you get when you take the fuel cap off to refuel again?
Ever since I replaced my tank, that thing wooshes pretty strong for a good five seconds. Maybe even a couple of seconds longer. I've read around the board but opinions seems to vary on it. I think it should be that way. It is a closed system, after all.
Btw. Now that you've replaced your fuel tank and likely already filled it, the next time you fill up, can you make mental note to see how long and strong of a woosh sound you get when you take the fuel cap off to refuel again?
Ever since I replaced my tank, that thing wooshes pretty strong for a good five seconds. Maybe even a couple of seconds longer. I've read around the board but opinions seems to vary on it. I think it should be that way. It is a closed system, after all.
Intermediate
Joined: Oct 2023
Posts: 33
Likes: 0
I would. The Bosch III has a superior spray pattern. And you can use the 300 dollars you will save on performance upgrades.
22lb/hr Corvette C4 L98 Bosch D3 TPi (southbayfuelinjectors.com)
22lb/hr Corvette C4 L98 Bosch D3 TPi (southbayfuelinjectors.com)
Racer
Joined: Jul 2022
Posts: 494
Likes: 162
From: Wilmington,Delaware
Thread Starter
Melting Slicks
Joined: May 2019
Posts: 3,244
Likes: 1,404
From: Mid-Atlantic
2025 C4 of the Year Finalist - Unmodified
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Oh, good. Then you have good pressure. You'll probably get a nice long one the next time you refuel, after you burn off what you just filled, I bet. Thanks for checking that out.
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Advanced
Joined: Feb 2024
Posts: 56
Likes: 14
Just installed Bosch 3 from SouthBayFuelInjectors. They comme with a billet aluminum extension to match the exact length of the Multecs. No Leaks.
To be honest, I didn't expect such a difference. My 89 Vette was still doing EPA fuel burn with the old Multecs (she only has 32k miles). But the bosch 3 is a different beast:
Much smoother response at any rpm, it just feels like a modern car. Didn't imagine that a better spray pattern could have so much impact on driving experience.
I didn't have to retune (car is 100% stock, those are the 22lbs ones).
To be honest, I didn't expect such a difference. My 89 Vette was still doing EPA fuel burn with the old Multecs (she only has 32k miles). But the bosch 3 is a different beast:
Much smoother response at any rpm, it just feels like a modern car. Didn't imagine that a better spray pattern could have so much impact on driving experience.
I didn't have to retune (car is 100% stock, those are the 22lbs ones).
Burning Brakes
Joined: Oct 2017
Posts: 823
Likes: 106
From: Somewhere near Fort Wayne, Indiana
No problem. You change your mind let me know. I bought a set of the Bosch III from Southbay Fuel Injectors. Worked perfect. I also soaked my EGR in parts cleaner while I had the upper intake off. Wasn’t giving me any issues but I figured what the hell. It was absolutely filthy.
Thread Starter
Melting Slicks
Joined: May 2019
Posts: 3,244
Likes: 1,404
From: Mid-Atlantic
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They're 22s, even though the part number indicates 20lb.
They're noisy as heck, though. You can hear em ticking from inside the car at a red light.
Hopefully they'll settle down and get a bit quieter, but I'm not so sure they will.
Think that's just the way they are.
Last edited by Natty C; Jun 20, 2025 at 01:45 PM.
Pro
Joined: May 2025
Posts: 614
Likes: 147
From: OK
I just installed the same ones from SouthBay on my '90 a few weeks back.
They're 22s, even though the part number indicates 19.
They're noisy as heck, though. You can hear em ticking from inside the car at a red light.
Hopefully they'll settle down and get a bit quieter, but I'm not so sure they will.
Think that's just the way they are.
They're 22s, even though the part number indicates 19.
They're noisy as heck, though. You can hear em ticking from inside the car at a red light.
Hopefully they'll settle down and get a bit quieter, but I'm not so sure they will.
Think that's just the way they are.
Thread Starter
Melting Slicks
Joined: May 2019
Posts: 3,244
Likes: 1,404
From: Mid-Atlantic
2025 C4 of the Year Finalist - Unmodified
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0280155710 is the part number on mine, btw.
Still haven't got used to the yellow though...
Last edited by Natty C; Jun 20, 2025 at 01:52 PM.
Drifting
Joined: Jul 2022
Posts: 1,805
Likes: 365
From: Central Florida
Listen to your fuel pressure regulator with a mechanics stethoscope or the screwdriver trick, you might just find the speed of the bosch III's open and close so fast they make the fuel pressure regulator slap. I can find it easily by listening to the return fuel line coming off the fuel rail.
Last edited by Vets-Vet; Jun 21, 2025 at 07:14 AM.