TBI to Vortec 383 Swap

[Vortec383Sierra]

Alright, here's the down low. I have a 1993 GMC Sierra, 4x4, 1/2 ton, extended cab pickup with 35x12.50 r15s on it. It currently has the 350 TBI engine in it. I am wanting to upgrade to a built Vortec engine. I know about the biggest part of the engine swapping part of it, but I was needing to know a few things about other stuff.

1. Will the Vortec ECM control the older 4l60e tranny, or can it be made to?

2. I am wanting a stroker engine and I was wondering if the block would have to be machined to accept a 383 crank such as the one in this rotating assembly. Summit Racing Part Number: B13055L030

3. I also have a TPI intake and was wondering if maybe it could possibly make more torque than the Vortec intake with a good set of heads?

4. Can the TPI ECM and harness be configured to control the 4l60e or would I need a controller, because I have a whole TPI setup excluding a fuel pump (upper plenum, manifold, runners, injectors, fuel rails, throttle body, wiring harness, ecm, and distributor).

I will probably think of more things to ask later, I just cannot think of any at the moment.
When replying, depending on which question you are answering, please put the corresponding number before the answer.

Thanks,
Vortec383Sierra

[907 Chevy]

1.just use your stock pcm.

2.I would go talk to a competent machinist before you buy any parts and find out the best setup to go with i,e.which type connecting rod,whether you'll need a small base circle cam,etc.

3.tpi runners were made for torque,so yes.why would you be using an l31 intake though?you could easily just slap a carb intake on there with an adapter for the throttle body.

4.Your stock pcm (8625)will control multi point injection just fine.its the exact same pcm as a 7427 which a few guys on this forum have controlling mpfi setups.

[Vortec383Sierra]

4. The only problem I see with this is that the TPI setup I have is a MAF setup, and the TBI is SD, but I know that you can convert the TPI to SD somehow, I would just would need to know what parts I would need, or what parts I could use off of the TBI setup, and how to convert the harness. And if I was to convert, would the harness be plug 'n' play?

3. I thought about doing this, but idk how much extra power that I could get from that setup. I have read that people have got pretty good torque numbers with the TPI setup.

[93ChevyTBI]

I THINK...not for sure, that tbi has more hp potential than TPI. Not sure about that though. I think I've read that TPI, although making more torque, runs out of air before tbi. Just something to think about if you are planning on going to 350-400+ hp with this.

[Vortec383Sierra]

I THINK...not for sure, that tbi has more hp potential than TPI. Not sure about that though. I think I've read that TPI, although making more torque, runs out of air before tbi. Just something to think about if you are planning on going to 350-400+ hp with this.

Idk about that or not, because I've read that if you want any more flow out of the TBI that you would need a bigger throttle body, and the manifold needs to bored to match it. On the other hand, a little porting of the plenum and manifold, and siamesed runners could solve the problem with the TPI which I'm planning on doing anyway.

[gmcmudder]

well im gonna be doin a swap just like this but its just a stock vortec. will it all match up to my trans providing i use the flywheel and starter off the donor motor?

[Vortec383Sierra]

well im gonna be doin a swap just like this but its just a stock vortec. will it all match up to my trans providing i use the flywheel and starter off the donor motor?

What year model is the truck, and what type of tranny is in it? If its a 4l60 like mine, it should bolt up but the transmissions used with the vortec engines had and extra solenoid that the 93-95 trannies didn't have (I think it was a tcc-clutch solenoid), so you may have to get a 96+ tranny.

[93ChevyTBI]

well im gonna be doin a swap just like this but its just a stock vortec. will it all match up to my trans providing i use the flywheel and starter off the donor motor?

I'm pretty sure you'll need to buy a vortec tpi base

[gmcmudder]

I'm pretty sure you'll need to buy a vortec tpi base

what exactly is that? im not dumb, maybe its just different terminoligy or ive never heard of it.

and as far as needing a different trans, i wouldnt think so i have seen a few of these done with 700r4's which from my understanding is a mechanical version of a 4l60e. just confused as to what starter and flywheel id need

[93ChevyTBI]

what exactly is that? im not dumb, maybe its just different terminoligy or ive never heard of it.

and as far as needing a different trans, i wouldnt think so i have seen a few of these done with 700r4's which from my understanding is a mechanical version of a 4l60e. just confused as to what starter and flywheel id need

being vortec heads which require a special intake, a typical tpi unit will not work. I think Scoggin Dickey sells lower tpi intakes for vortecs

[gmcmudder]

being vortec heads which require a special intake, a typical tpi unit will not work. I think Scoggin Dickey sells lower tpi intakes for vortecs

alrtight ill check into them. i know you need a different intake for em i was gonnna get a carbed intake n put an adapter on it for my tbi. but we shall see