1988 - 1998 (GMT400) Section for all discussion related to the 1987-1998 Chevrolet and GMC trucks.

1990 5.7 swapping stock TBI for Holley

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Old Jul 22, 2022 | 8:11 PM
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Smilin' Ric's Avatar
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Default 1990 5.7 swapping stock TBI for Holley

I have a Silverado with the TBI equipped 5.7 V8. Considering swapping it with the Holley replacement TBI (not the Snipper, just their regular replacement part version). Holley suggests this be a simple swap out, no modifications required, and everything will continue to work as designed.

Has anybody here made this swap? What were your results? More power? More torque? Any change in fuel mileage?
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Old Jul 26, 2022 | 6:20 PM
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Not much help on this site I'm noticing. If you do it, I'd sure like to know how it goes. I have the TBI on my '93 too. But my first mod is going to be vortec heads and whatever induction works best with them
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Old Jul 26, 2022 | 7:22 PM
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Thanks for the reply. And I post an update should I go with it. In the meantime, since you noted not too much help here, have you found any other forums that offer more?
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Old Jul 26, 2022 | 9:34 PM
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Haven't found another forum. I have resorted to YouTube videos for help .
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Old Nov 16, 2022 | 11:01 AM
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Did you ever do this swap. Id like to do the same to my 93.
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Old Nov 16, 2022 | 12:33 PM
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Participation on this forum is pathetic. I'm going elsewhere for support.
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Old Nov 20, 2022 | 10:45 AM
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Originally Posted by UrbanBurban
Participation on this forum is pathetic. I'm going elsewhere for support.
There are far more people asking for help than offering it.

Those of us that can help are doing the best we can to keep up but that doesn’t mean we’re going to be able to answer every single question. I have a life outside of the internet and it’s more important than anything happening here.

Additionally, the topics/questions that come up have often already been answered in previous threads. Utilizing the advanced search function and some patience can provide many answers.

Good luck.
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