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LS3 loaded intake

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Old Jul 4, 2023 | 05:43 PM
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Default LS3 loaded intake
Where might be some good places to pick up a loaded LS3 intake and what size injectors for 600-ish HP ?

New ?
Used ?
cable TB not DBW.

Thinking of going Holley EFI to drive it and tune myself Vs a mod'ed stock ECU and the need to take to someone.

GM (General Motors) - 19418251 - Chevrolet Performance Parts Complete L92/L76/LS3 Gen IV Intake (paceperformance.com)

70074 Loaded LS3 Aluminum Intake Manifold 750HP Kit – FiTech Fuel Injection (fitechefi.com)

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Old Jul 5, 2023 | 04:04 PM
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I've bought a couple of LS3 intakes with injectors and fuel rails over on corvetteforums.com. Can't speak to the 600 hp injectors.
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Old Jul 5, 2023 | 04:29 PM
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Can find them all day long in the for sale section as pulloffs, but they will have 42lbs injectors stock. For that power rating you will want something a bit higher to keep the duty cycle lower. The L92 (truck 6.2 flex fuel injectors were 55lbs they would work well at that power range.

I dont think anything used a cable on the 6.2L so you will need to go aftermarket there so pick your vendor/ which one you think looks best. I've got a holley 90mm on my 414.
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Old Jul 5, 2023 | 05:25 PM
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To clarify further, NO Gen IV LS engines used drive by cable TB's
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Old Jul 5, 2023 | 05:34 PM
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Not true sir, my LSX is Gen IV and drive by cable...
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Old Jul 5, 2023 | 05:38 PM
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Originally Posted by 01CamaroSSTx
Not true sir, my LSX is Gen IV and drive by cable...
Which OEM vehicle was it equipped in?
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Old Jul 5, 2023 | 05:53 PM
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It was a joke Gary. You stated no Gen IV LS engines use DBC and this true with the factory production LS engines.
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Old Jul 5, 2023 | 07:35 PM
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OK, so 50+ injectors, aftermarket TB, and find someone I can trust in a used one if I don't find a deal on a new one.

Thanks all.
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Old Jul 6, 2023 | 04:03 PM
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On my 67 Nova with a stroked/sleeved LS2 427 cubes I used the Holley DBC throttle body. Worked well.

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Old Jul 6, 2023 | 07:57 PM
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Options... thanks

Still just in thinking stages...have a few other things in mind yet that need done.
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