Thread: Tbi vortec swap
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Old 07-06-2018, 03:32 PM   #5
Acorn
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Join Date: Jul 2013
Location: Winnsboro Texas
Posts: 367
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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