w_mortell

will the 2.8 and 3.1 intake manifolds interchange? can I put a 2.8 intake on my 3.1? Please, no one ask why...i got a bit of a silly idea....i hate fuel injection, and I dont have the dollars to swap for the v8 just yet, so I am wanting to put a carbed 2.8 intake on my 91 3.1 motor. anyone know?????

kukerdan

iTrader: (1)

sounds like a bad idea

drdave88

iTrader: (3)

yes you can, the intakes are interchangable. curious as to why you would want to go to a carb over fuel injection? there are hardly any downsides to FI.

w_mortell

there is hardly any besides, if there is a problem.....you have to go through just about your whole fuel system and electrical system to figure it out.

83camaro86

iTrader: (1)

The other problem with this swap would be your gas tank. I know on some models that the FI tanks have the pump in them and the carb dont. And that couse some type of vacum problem. Not sure about all the info.

2.8RS

iTrader: (5)

I looked into this too and it would be more than a simple carb and intake swap. You would have to get a vacuum advanced dizzy from a older f-body or s-10/blazer, turn the fuel pressure way down, and probably some other small stuff I am forgetting about.

bl85c

iTrader: (2)

Is it just me or does this thread seem familiar? Seems like the fi to carb swap comes up fairly fequently. Why?...

2.8RS

iTrader: (5)

Because people like me hate always having to deal with bad/malfunctiong sensors and would just rather swap to a simpler carb. Not nearly as many electrical issues like I am having right now.

bl85c

iTrader: (2)

Maybe you should check your grounds, they tend to deteriorate over the years. If you're getting rf interference through your radio on the am stations you've definately got grounding issues. I had to take my whole harness out not too long ago and clean it up to stop burning sensors out. No probs now.

2.8RS

iTrader: (5)

I have come to the conclusion that I do have bad grounds after going through other stuff on the car to figure it out. Where does the battery ground go to? Better yet where are all of the grounds on the car, sorry for the hijack.

85camarojunkie

Another suggestion to the tank is to take out the Fuel pump relay and switch your hoses. Use the Inlet for outlet and and your outlet for inlet. I did this to my 350 TPI to a 283 Carb. I did a lot of research and that is what i came up with. but it does work. No laughing or bad mouthing.
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Thats if you do a Carb swap

fictmich

You can swap to a older 2.8 carburated intake, and if my memory serves me correctly, I believe Edelbrock actually makes an upgraded one. Like mentioned before you will loose some drivability and it will be more work than simply changing the manifold.

85camarojunkie

Hey while your at it pull the motor and put in a 4.3 that would be sweet. But keep us posted. Would like to know what your going to do...

drdave88

iTrader: (3)

fuel injection is no different than anything else. its only complicated if you dont understand it. i dont mean anything rude by that statement, but it is true. any sort of math algorithm is absolutely crazy to me.... because i dont understand it. if you learn the FI system, youd see that it is far superior to carb in just about every way. please dont take this is an insult to you personally, because i know there are plenty of things as far as cars go that i dont understand and still dont like, lol.

85camarojunkie

Thats the truth. I know alot about motors and alot about Carbs. I was given a TPI system, computer, wiring. Yea all of it. But it looked so confusing i looked at it for two weeks. But i didnt even try to hook it up i just took every ones advice and stayed carb. MY STUPID MISTAKE.
So i sold the kit to a guy with a 55 chev and he had it on in like a week and running. So no dont give up on it I made a stupid mistake of something so simple also. But a V8 Swap would be cool or a 4.3, lol

GOOD LUCK

83camaro86

iTrader: (1)

Can you put a 4.3 in a camaro?? It would be cool to do cause the block is the same as a V8. You could do a lot of build up on them to.

2.8RS

iTrader: (5)

^I think that just about any motor can be stuffed into a third gen. A 4.3 swap would be unique. I haven't heard of anyone doing it.

83camaro86

iTrader: (1)

Yea I have thought about trying to find a wrecked S-10 with a 4.3 in to get the motor and tranny out of along with all the wring to do a swap like that just not sure if you could do it or not. I know you can get a V8 into a S-10.

bl85c

iTrader: (2)

If I remember right there's 3 main grounding points. One on the back of the driver side head, one on the firewall and one low on the front of the motor for the battery ground. There's random grounding points all over the frame as well, but as long as the main points are clean and tight things should work fine.

85camarojunkie

I think we all stopped caring about the 2.8. Ill admit i dont care LOL. Just kidding. but you could get a 4.3 vortec motor tranny is the same, im sure you all know that. Get the stall out of an s10 and the 4.3 not much to change over. Edelbrock also sells the 4bbl carb intake for that motor. Unless you stuck with the factory throttle body.
But if you have another car to drive and it being winter. I would say do the 4.3. I have one not in the car but im building for my next camaro. Nothing big just to have a carb v6, so the wife wont kill herself. Plus theres so much more room under the hood to work.
KEEP US POSTED

2.8RS

iTrader: (5)

Thanks, I'll check those out.

zs&tas

BIG BLOCK :-)

drdave88

iTrader: (3)

GO BACK TO THE V8 ROOM :-)

bl85c

iTrader: (2)

DemonKnightDK

maybe he means a big block V6 (4.3L bored and stroked? :lol)

85camarojunkie

Did you get it all fixed then. The car back to running, the 2.8 i mean. If so congrats

87v6baby

no the 3.1 intake manifold wont work unless you have the 3.1 heads to go with it.

bl85c

iTrader: (2)

Do you mean iron hd 3.1 or the alum hd 3100 manifold? The iron hd manifold interchanges fine.