08-02-2011, 11:41 AM | #1 |
Registered User
Join Date: Jul 2011
Location: El dorado Sprgs. Mo.
Posts: 137
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383 want bigger TBI
In changing over to the 383,in my 90 K1500,is there any chance of bolting up a TBI from a big block on the 350 intake,other concerns are what computer modifications if any? can I do for this conversion
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09-15-2011, 03:47 AM | #2 |
One day...
Join Date: Apr 2008
Location: Tuttle, Ok
Posts: 9,240
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Re: 383 want bigger TBI
Moved out of "projects and builds so you can get some replies.
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09-15-2011, 08:08 AM | #3 |
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Join Date: Jun 2008
Location: Lubbock, TX
Posts: 2,047
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Re: 383 want bigger TBI
The intake will need to be bored/hogged out, otherwise the big block TBI will hang over the edges and create a helluva ledge for the incoming charge to try to get past.
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09-15-2011, 02:02 PM | #4 |
Chris
Join Date: Nov 2004
Location: Monaville, WV
Posts: 3,737
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Re: 383 want bigger TBI
why bother with that intake?
buy a 4bbl intake and an adapter plate and make that work, I hear the single plane high rise style are the best for tbi setups. You can use a big block tbi and you can get bigger injectors and have the computer tuned/flashed or chips burnt for it. As for fuel then an adjustable pressure reg. would help as well as an in tank tpi camaro fuel pump upgrade.
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09-17-2011, 07:20 PM | #5 |
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Join Date: Jul 2009
Location: Denver Burbs, CO
Posts: 116
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Re: 383 want bigger TBI
Check out the eBay store for extreme EFI They bore out the 350 tbi to 50mm from stock 44. Not only will it be bigger bores but it will also have better bushings for the butterfly shafts and some airflow mods too. They also sell the sbc manifold bored out to 50mm and gaskets to match.
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09-17-2011, 07:26 PM | #6 |
Registered User
Join Date: Jul 2009
Location: Denver Burbs, CO
Posts: 116
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Re: 383 want bigger TBI
You will also need to put in a better fuel pump (AC Delco 241 or 281 I can't remember) and an 18 pound regulator spring.
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