Conversions & Swaps LSX Engines in Non-LSX Vehicles
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Intake swap

Old Nov 15, 2022 | 10:52 AM
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Default Intake swap

Presently have a stock intake on my 2003 LM4 with a factory tune in my '39 Chevy. Thinking about changing intakes to something else such as an LS1 or even aftermarket. Question is will it affect my tune?
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Old Nov 15, 2022 | 02:58 PM
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Won’t require a re-tune to run. If you want the most out of it, you’d need to retune it for the intake you pick. Esp. if you pick an aftermarket one. Going from something like the truck intake to an LS1 you will lose power basically everywhere. You’d need to pull fuel. Going to a TBSS or a FAST or similar, you’d need to add fuel. Either way if its NA, I don’t think you’ll “hurt” anything by changing intakes. But it’s not going to be optimal without a re-tune.
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Old Nov 15, 2022 | 03:51 PM
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Maybe a LS6 intake? A number of years ago Hot Rod magazine ran a test on a number (20 plus) of LS intakes. The LS1/ LS2 intakes were low man HP wise.
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Old Nov 16, 2022 | 08:39 PM
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The best bang for the buck, is a NNBS/TBSS intake. They flow a little less than a FAST, but much cheaper.
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