Jurrel

I currently have a 2.8L V6 carb'd engine in my 1984 Firebird. I am thinking of going to a 3.4L V6.....though I am not sure what I would need to change on the 3.4 as I know those were all Fuel Injected..not carb'd. Would the carb and intake on the 2.8 be to restrictive on a 3.4?

Or does ANYONE know of a carb that would work on a 2.8 or 3.4 that is legal in California for street use?



Any help would be great!

forever3

Is there any way that you can get the fuel injection system for the 3.4? Thew reason I ask, is that until a few months ago I had a 95 camaro with a 3.4 in it. LOVED it! Owned since it was new, and the thing performed very well. Having owned one, I doubt that motor would do as well with a carb, especially if youre in California. If there is any way you can keep it fuel injected, I would. If you do go with a carb, check out the Holley website. I also know that Edelbrock makes some carbs for California cars, but not sure about the V-6.

Parrydise7

iTrader: (1)

Go to the tech articles and look for "miscellaneous modifications." There is an article on this subject.

Jurrel

Your thinking of the 2.8 to 3.4 swap boogie, and yes that covers SOME of what I want...I am seeking EXPLICIT info on carburating the 3.4 with what came on the 2.8....I know switching the engine itself out is easy enough to do.

And if I went with the EFI setup....then I have little choise but fighting the smog ****'s here in california....

And from what I hear, if you put on the EFI...on a car with NO EFI for that year, you may as well jus move out of state, it's to expensive to get them to allow it.

As for the carbs, there is very very few carbs for the V6, and even fewer that can work in California...maybe the best thing will be run this into the ground, as an excuse to go get a 87 or 89 transam....

Parrydise7

iTrader: (1)

Okay, I've got it now. I replaced the carb'd 2.8 in my Jeep with a 3.4. It was just a straight swap. The intake and carb from the 2.8 swapped right over. Now, I have to admit I have no idea what you have on your car in terms of a carb, but you are right, if you swap to efi, you will have a problem. In fact, you can't even swap carbs.
There is a Weber (!) for the 2.8 but it is not smog legal. By the way, Edelbrock makes an intake mani for the 2.8. It is a 2 piece. You can get one top that mounts the standard 2 bbl carb. There is a second top that will mount a small 390 cfm 4 bbl carb. Needless to say, that 4 bbl is not smog legal.
Okay, did I answer your question now?

I'm editing to let you know that I got that 3.4 at the dealer, not a junkyard. If you look around you can get a new 3.4 for around $1700. When I talked to some mechanics about rebuilding the 2.8, I was told that the 2.8 could not be rebuilt, "and do it right" for the cost of that brand new 3.4.

Jurrel

*chuckles* Yes this time you did answer it. And I would be using the stock E2ES<I think it is> from the firebird's 2.8, its a 2 bbl carb.

99Hawk120

Honestly, I wouldn't bother, that carb seems to be a restriction on the stock 2.8L.

Jurrel

I thought it seemed restricitve on the 2.8L...but I was trying to make sure of that...and no one seems to make a smog legel one for the 3.4...ah well...

MDv6man

To properly do the swap you will ned to run an electric fuel pump as the 3.4 does not have an opening for the regular fuel pump. With an electric fuell pump and a rebuilt ES2e carb (use the 2bbl intake and accessories) you will be good to go. Don't tell the smog peeps it's a 3.4 -- unless they ask. If they don't ask don't tell. It would be hard to tell a 3.4 from a 2.8 as they are the same block.

five7kid

iTrader: (14)

Not really. You put all of the equipment from the later year on the car, and smog it as the later car. One-time trip to the ref, you'll be good to go after that.