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07-04-2018, 10:27 PM | #1 |
Registered User
Join Date: Jun 2010
Location: crowley tx
Posts: 21
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Tbi vortec swap
Ok ive read everything that i could using the search method and still have not found what i need to know , i have an 89 blazer with a tbi and im wanting to swap it with a vortec engine just for the fact that i already have one laying around and the one currently in the truck is bad. I know ill need a vortec carb intake with an adapter plate for the tbi, and changing dis gear, not worried about emmissions. What i need to know has anyone swaped this without adding anything else like a chip or messing with the fuel system, if so how did it run. Thats it thanks again. Sorry for the long story
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07-05-2018, 11:48 AM | #2 |
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Join Date: Nov 2014
Location: Bigfork, Montana
Posts: 1,137
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Re: Tbi vortec swap
GM makes a TBI vortec intake, they are very proud of it though! I've done a few, everything bolts in. I stopped using the TBI braces for the accessories than extend back & bolt to the intake. I think they make the vortec intake gaskets leak easier/quicker. Just my opinion.
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07-05-2018, 03:03 PM | #3 |
Registered User
Join Date: Jun 2010
Location: crowley tx
Posts: 21
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Re: Tbi vortec swap
B.w. thanks for your input, did you run the ones that you have swaped without a chip, if so how did they run
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07-06-2018, 12:54 AM | #4 |
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Join Date: Nov 2014
Location: Bigfork, Montana
Posts: 1,137
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Re: Tbi vortec swap
I used Dynamic EFI, EBL Flash (has since become EBL Flash II). You use a laptop to tune, can set up mild to wild.
I think with the stock Vortec cam you might get away with the stock computer but I don't know. |
07-06-2018, 03:32 PM | #5 |
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Join Date: Jul 2013
Location: Winnsboro Texas
Posts: 367
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Re: Tbi vortec swap
I've done this swap and here are a few things I can remember off the top of my head.
It will run like crap on the stock tune. I also use Dynamic ebl flash. Love it. It has a ton of bells and whistles for tuning. Your tbi fuel pump will not be enough psi. I just use am'96 vortec pump. I run about 18 psi fuel pressure. (Compared to stock TBI that was like 11 or 12 psi. So you will need an adjustable fuel pressure regulator or a different spring in stock regulator. Make sure you have a water pump with a bypass hose. Everything from your '87 will bolt to the l31 block. Use GOOD Felpro intake manifold gaskets! I use AC Delco R44LTS spark plugs. If I remember anything else I'll post it.
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The bitterness of poor quality lingers long after the sweetness of a low price is forgotten. |
07-06-2018, 05:07 PM | #6 |
Registered User
Join Date: Jun 2010
Location: crowley tx
Posts: 21
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Re: Tbi vortec swap
Thanks for the info, i guess i need to find someone to tune it after
the swap is complete |
07-07-2018, 01:29 PM | #7 | |
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Join Date: Apr 2013
Location: GUNTERSVILLE
Posts: 621
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Re: Tbi vortec swap
Quote:
You can use an aftermarket intake and buy/build an adapter plate. You will have to fabricate or modify your throttle cable bracket. You will need a new tune, engines are radically different and it's never going to run right with the existing tune. |
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