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Old 06-01-2004, 02:13 PM
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Carb or EFI, which one is better for my motor

I have a dilemma about what to go with for my 406 sbc. It will be going into a '90 Silverado and backed by a TKO 5spd. I am not sure whether to go with the new tri-power (3x2 carb) set up by Barry Grant, F.A.S.T. EFI, a single Holly Truck Avenger (770cfm) or two Demon 4-barrels . I want gobs and gobs of low end torque and I am not sure which to go with. I know the EFI gives you endless tuneability but I am not to knowledgeable on how to program the computer. I am trying to repeat the motor that was featured in Chevy High Performance called the ImpersonatorII. All help would be appreciated because this will be my first engine build. thank you for your help. is the link to look at the article. the spaces between the 8 and 0 is a _ and so is the space between the 1 and imp/

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Old 06-01-2004, 02:41 PM
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depends mostly on your budget and your willingness to learn. Honestly, if you get a good quality intake, carb and ignition, you'll have a bulletproof motor that you can start right up in the winter. EFI is likely to get you better gas mileage, better cold starts and will adapt better to changing environments. It shouldn't be hard to get lots of low end power from your 400 with either set up, but don't over-intake, over-head, over-cam or over-carburate your motor! These will destroy your low-end.

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