I have a 2.8 engine out of a s10 that is throttle body and I was wondering how I would go about changing out the throttle body and putting on my TPI and how hard would it be?

 

Welcome to thirdgen.org.

By "TPI", do you mean the 3rd gen V6 induction system? That's typically called "SPFI", and "TPI" is the V8 system.

Anyway, move everything over from your engine to the S10 engine. I've heard (9 years ago, when I first got my V6 Camaro with a cracked engine block) that the S10 engines have the oil filter in a different place than Camaro V6's, so be aware of that potential issue. The V6 forum would probably be a better place to get accurate info.

In fact, let's move this from "Engine Swap" to the V6 forum.

 

You want to go from TBI to MPFI? Why would you want to swap over injection systems. If you do then you would want the intakes, fuel rail, injectors, some sensors, and not sure if you would need a computer swap or not with wiring. All off of a V6 f-body and depending on years if your truck is MAF or MAP.

 

I was just wondering if the my MPFI would go in the place of the throttle body on the s10 engine. I don't want to put the wiring harness out of the s10 into the camaro just the engine

 

It would go on the motor for sure but I am not sure if you would have to do any wiring for the different intake and fuel setup. I bet that you would have to.

 

What it sounds like is you have a 2.8 MPFI in your Camaro...you want to take a 2.8 TBI and put the engine(minus intake/injection) into your Camaro. So you basicaly just want to swap blocks, right?
Just trying to clear up some confusion on my part.

 

Oops, my bad. Better get my terms straight. . .

 

I'll try to explain what I'm going to do the best I can. I have a 2.8 engine out of my Camaro that has the MPFI but the block is craked. My father gave me his S10 that has a 2.8 engine but it is TBI. I want to take the the TBI off of the S10 engine and replace it with the MPFI stuff off of my Camaro engine then put it in. Because if I left the TBI on I would have to rewire it and I'm not the greatest at wiring. What exactly would it involve to change all that over. They are the exact same engine, just one is TBI and the other is MPFI.

 

yeah so swapping blocks. easy. no probs.

 

The block/heads/camshaft are the same. You need to strip the good engine down to the long block and then put all of your camaro parts back on. This includes the oil filter adapter that was mentioned above. The camaro has an adapter to put the filter at a different angle than the S10.

Good luck!

oh, and you wouldn't have to rip off the TBI if you didn't want to. If you look at your harness, you will see that the left bank is hooked to injector 1 from the fuse panel and the right bank is hooked to injector 2. You can use the main leads and grounds from your injector harness for each bank to supply your TBI injectors. Your distributor can come from the old engine so that the wiring is the same. Then fire up and run!!

 

Wrong, the cam is WAY different. But it will provide more torque if you mostly do intown driving.

Otherwise, everything will bolt around. The block is the same, heads are the same.

What year is this TBI motor from? You may have flywheel/flexplate problems.

 

I've seen people say that the cam is different, yet everything that I've seen from reliable sources says otherwise.

 

Ive measured them and the lift is slightly different.(maybe wear? dunno).

I couldnt tell on duration. I have no way to measure that.
I could also tell a SOP difference in power.

Will a s10 cam work on an MPFI engine, YES.

 

I'm skeptical on running a tbi setup with the MPFI ecm. Even if you've got the maf hooked up and the injector wiring modified I don't think the drivers would support the tbi injectors.

 

My GM V6 racing manual from 1991 said they were the same in fuel injected applications 85 to present (91)...

I don't see why the drivers wouldn't support TBI injectors... What's the difference in the drivers? Are they smaller or weaker or something? Just curious...

 

It's high impedance vs low. Not saying you can't run a low impedance injector with an ecm designed for high, just skeptical.

 

What heppens when you connect a few high impedance injectors in parallel? The impedence drops. R/#inj=final impedance.

 

i might have finally found an engine to replace my 2.8 and its out of a 92 S10. does anyone know if they were TBI or MPFI? shouldn't it just be an intake swap and oil filter adapter switch? doesn't sound that complicated. if the cams are different i dont' think the difference in TBI to MPFI is too big to matter.

 

As long as it's the 2.8 (4.3 was also offered the same year), then yes it's a simple intake, exhaust manifold and oil filter adaptor switch. You may also need to swap the oil pan, especially if it's out of a 4x4, and the water pump, since they are a different length between the S-series and F-body. Using the S-series water pump pulley will allow the belt surface to line up with the other accessories.

 

that makes having the old engine really handy. i've already got the water pump off the old engine (real pain in the ***). not sure if that was a type-o six_shooter, but if the water pumps are different lengths wouldn't that mean changing out the accesory brackets too? and can anyone just keep the S10 pulley system on?

 

Nope, not a typo. The water pump and water pump pulley differ between the two engines, that keeps the belts in the same relative distance to the block.

If you put the pulleys side by side, you'll see what I mean.

 

So which flows more? I've wondered what's the best pump out there for these motors for a while.

 

Neither one flows better. The back side is the same, just one has a longer snout for mounting a mechanical fan.