Eagle carb

[eaglescout526]

Need a little help as I am on the fence with what I can do given that I found out I can do a carb swap.

[89 MJ]

4.0 head swap, 4bbl intake, and a little 4bbl carb with an HEI ignition. 

[eaglescout526]

1 minute ago, 89 MJ said:

4.0 head swap, 4bbl intake, and a little 4bbl carb with an HEI ignition. 

Lol. Lets pass emissions first then I can have some real fun.

[Pete M]

step one: whatever is the easiest to get it to pass emissions.

 

step 2: LS

[hgeranium]

6 minutes ago, Pete M said:

step one: whatever is the easiest to get it to pass emissions.

 

step 2: LS

[eaglescout526]

6 minutes ago, Pete M said:

step one: whatever is the easiest to get it to pass emissions.

That’s the thing. Haha. Both are easy. I’m close on the Carter carb, it’s running rich to where it’s not passing. 
But the other can be just as easy of a swap since I have it and could get more power. 

 

7 minutes ago, Pete M said:

LS

LS powered eagle. That’s a monster. 

[89 MJ]

13 minutes ago, Pete M said:

step 2: LS

This is allegedly my plan with mine, we’ll see how that goes eventually

[derf]

If you're going to do a carb swap, I have a Motorcraft 2150 that I just took off my CJ.  And the adapter to bolt it to a 2bbl manifold.  The 2150 is a good all around carburetor.

 

It probably needs a rebuild and maybe some different jets.  It was running rich on my CJ.

 

Another alternative would be a TBI from a 4.3 chebby.  Easy swap if you're good with wiring.

[watchamakalit]

4 hours ago, derf said:

 

Another alternative would be a TBI from a 4.3 chebby.  Easy swap if you're good with wiring.

 

I went this route in my cj. As much as I enjoyed the simplicity of carbs, the tbi is nice. much better cold starts and a really easy setup to work with. 

[Eagle_SX4]

For now I suggest keeping it carbureted.

 

I have read some about the Weber swap and it seems like a good option if you have the correct model. 

 

You can still buy all the parts for the Carter BBD. I ran one on my 4.0 for about 2 years before I put the multi port injection on. Also if you have the version with the computer controlled stepper motor on it, that adds to the tunning issues. 

 

If you keep the BBD I would suggest bypassing the computer using the "nutter bypass" method. Then finding a non stepper motor BBD. Those are much easier to tune. 

 

I highly suggest getting a wideband O2 sensor to help with tunning. For me it was nearly impossible to tell if the changes I made helped or hurt the tune.

[eaglescout526]

9 hours ago, derf said:

If you're going to do a carb swap, I have a Motorcraft 2150 that I just took off my CJ.  And the adapter to bolt it to a 2bbl manifold.  The 2150 is a good all around carburetor.

 

It probably needs a rebuild and maybe some different jets.  It was running rich on my CJ.

 

Another alternative would be a TBI from a 4.3 chebby.  Easy swap if you're good with wiring.

Great ideas. However I’m on a time crunch with the temp plate to try to pass emissions. 
 

4 hours ago, Eagle_SX4 said:

have read some about the Weber swap and it seems like a good option if you have the correct model

I think I do, I’m gonna have to clean it up and look at it but it’s has an adapter plate that mated to the 2.5L manifold from what looks like the base of the 258 manifold. 
 

4 hours ago, Eagle_SX4 said:

If you keep the BBD I would suggest bypassing the computer using the "nutter bypass" method. Then finding a non stepper motor BBD. Those are much easier to tune. 

I’ve contemplated the bypass, however I wasn’t sure I could do it since I can barely find any info on what you can and can’t do in AZ related to carbs and stuff. But since I can do a carb swap, a nutter bypass can be done along with the HEI stuff. Though the duraspark is running pretty good to my surprise. 
It does have that sole-vac or idle stop as it was called on other AMCs but I adjusted that screw so the idle stop isn’t doing much. 

[Eagle_SX4]

45 minutes ago, eaglescout526 said:

I’ve contemplated the bypass, however I wasn’t sure I could do it since I can barely find any info on what you can and can’t do in AZ related to carbs and stuff. But since I can do a carb swap, a nutter bypass can be done along with the HEI stuff. Though the duraspark is running pretty good to my surprise. 
It does have that sole-vac or idle stop as it was called on other AMCs but I adjusted that screw so the idle stop isn’t doing much. 

Even if you don't do the by pass get a wideband O2 sensor to help you tune what you do have. That would be the most time efficient way to pass emissions.

[eaglescout526]

4 hours ago, Eagle_SX4 said:

Even if you don't do the by pass get a wideband O2 sensor to help you tune what you do have. That would be the most time efficient way to pass emissions.

i will have to do that. Looks like the PO's got a new O2 installed rather recently.

 

Also the Weber I have is a 32/36 which is supposed to fit. Might be a good candidate.