I just rescued a 1987 Z28 no motor no tranny not really a rear end right now the rear that might go in there has 2.77 gears.

I want to put a V6 and a 5speed from a 4th gen probably the car currently has no computer or computer wiring.

my criteria is what everyone wants a powerful gas saver but I understand there will be a compromise let me know what all I need I know a full donor car is best but that isn't always possible.

Thanx

You will need a full wiring harness and computer to start..

The v6 motors didn't really provide fuel economy that was any better than the v8 cars, in fact I think the tbi 305 was better on the highway due to the ability to run highway gears. Spending money on a v6 swap to save money on gas is a losing proposition.

It not really a swap as there's no engine in the car to begin with. I want the v6 because there easier to find and cheaper and lighter

The 3.4L V6 in the 4th-Gen F-body doesn't use an OBDII engine control system. The 3400 V6's are OBDII.

You might get more help in the V6 Board, and this thread might get moved there.

No because this is about putting a different engine in a 3Rd gen I am trying to get question answered like what motor mounts to use where to mount the ECM stuff like that

use a 7730 3.1 ecm and harness or u can use the 302 v6 maf ecm and harness

u wont be able to use the 3.4 intake as the distributor wont clear the back of the intake without some mods ,basically u cut off the crossover tube and weld the sides shut

u will need a distributor and intake off of an 2.8 or 3.1

the 3.1 ecm can run the 3.4 dis system though u need to repin a few wires on the harness sixshooter would be the one to talk to about that

other then that u will need v6 motor mounts and v6 front springs

im sure u know this already but u will have to get the v6 transmission as well as the 2.8/3.1/3.4 are 60* engines and the reg 90* v8 stuff wont bolt to it without a 60$ adapter plate from speedway motors.

btw the 3.4 ecm is obd 1.5

and the v6 will get **** poor milage with the 2.73 rear gear , at minimum it needs a 3:23 , 3:73's produce the best gas milage in town with the v6 , and 3:42's are best for mixed driving city/highway

The '96-'02 3800 swap has some merit: My '96 Bonneville did 28 MPG city and 35 MPG hwy, but I've never heard of any fourth-gen getting anywhere near that. Those don't take much boost, unless you swap the crank, rods and pistons from the supercharged FWD versions. And it won't like your 2.77:1 axle. I've driven a '93-'95 3.4L, it won't tolerate a 2.77:1 axle at all. A stock LO3 cruising at 1600 RPM at 65 MPG is not the hot ticket for anything. My '91 RS never topped 25 MPG, not once, no matter what I tried. I've had a carbureted 350 do better, and with another 200 RPM while doing 65. Dunno about the salvage yards in your area, but getting a complete 5.3L would be your best start. If money is ultra tight, an '87-'95 LO5 is capable of near 30 MPG if you get the fuel and timing right. Only 210 HP, and all done by 4500 RPM, but it'll take a 150 shot of nitrous and it's good enough to be tolerable while you work toward whatever you really want.

I don't know what I want lol I want:

OBD2
manual
fuel inj
AT LEAST 20mpg as it will be my daily driver


and it has to be muscly as it is still a camaro and I think it will be a post apocalyptic car so it needs to be aggressive and angry

i wanted a v6 cause its easier and cheaper to get, and its lighter

any way i can do any of this with the crossfire? obviously not the obd2

some point i am more flexible than others

I use my 2.8 as a daily driver and get 24-25 MPG all day. I know some 305 guys say they get that one the highway, but I hear from more of them that get 16-18 under normal driving

having said that, you'll have a lot to change to move to a V6 car. harness, front springs, computer, ect.. it's a ton of work

Also, I'm not sure about a 2:77 rear end witha v6. It's probably going to labor so much to get going you'll wind up with worse MPG

if you have a donor car with everything you need, that will help, but from what I understand it's no cakewalk to put a 3.8 in a thirdgen, or more people would do it. you would be better off getting a 2.8 or 3.1 to drive or transplant, or maybe a 3.4

but then again, if you are wanting a daily driver that gets good MPG, you've probably chosen a bad platfrom to start with (a third gen that was originally a v8 car)

If you want OBDII, the cheapest route will be an LT1

A 3800 from a 4th gen can be done but it will require a bit of fabrication.

You can also use the 24x setup from eficonnection to put the LS1 pcm in control of a tpi engine getting you obdII.

am i crazy for wanting obdii?

What you want is what you want.

Personally already being a V8 car and for the cost, I would go LT1, with either the stock PCM, or the 24x setup.

Maybe I should just start making 3800 swap kits

I'd buy one!

That certainly doesnt keep me from doing it,

I'm just saying in today's world there's probably a market for putting the 3.8 into our cars. there's a ton of them out there, and they are pretty cheap.

The first person that makes it a painless process could pretty much corner the market.

Would probably be more like the first person to make it painless is the first to get ripped off by china duplication of peoples innovation.

you might be right, but do the chinese make a ready to go LS1 harness?

Not to mention it wouldnt be as profitable as some might think, realistically what $200 for mounts, outside of that most people would be too cheap to buy other parts for the swap, they'd rather have non a/c hooptys, and electrical taped together twist tied wiring than a true quality swap.

Yeah for other cars, i'm just waiting for them to popup copying when I complete the new one i'm making.

everyone keeps mentioning the 3.8 i'm guessing thats still the best idea although not a direct bolt in

if I could get a complete donor 96~ 3.8 F-body what else would i need?

actually I like the Lt1 idea if you want a OBDII car

If you got a complete one with T5 you'll need:

Fabricate engine mounts

Fabricate a Y pipe

Fabricate a/c lines

Make new PS pressure hose

The engine wiring harness will need to be extensively modified like an LT1/LS1 swap to make one usable wiring harness out of both.

A vats module to take care of antitheft ( not sure whats available for tuning the stock pcm offhand, but i'm sure there are a few places you can send it to for this also)

You'll need the abbott cable x to make the speedometer work

all that sounds doable except the modifying of the harness and

the power steering line seems odd but when i was looking into doing the lt1 swap for another project I was planning on using the P/S lines form an lt1 caprice

The caprice line doesnt fit very well, I dont think i've ever had any complaints about the line I offer, it fits better and should last a rediculous amount of time, if you end up doing it feel free to contact me about the harness, I can make a complete new one, or modify existing ones.