NewKindOfClown

I'm kicking ideas around for a future project, and I'm having trouble finding good information on CF about swapping to a carburetor on an XJ 4.0L. The few threads I have found devolved rapidly into a debate about practicality. My interest is in making the motor run properly; not necessarily its application in a Cherokee.

-- I'm NOT asking about practicality. The swap is theoretical, and I am simply looking to learn new information. --

Talking points:
- What's needed? Who makes the parts? What's the overall cost?
- Any differences between Renix, High Output, and '00/01 coil packs?
- Any differences between a stock 4.0L and a 4.5L, 4.6L, or 4.7L stroker? How many CFM for each?
- What would be the performance loss from converting?

Of course any other questions or information would be welcome. But again, please remember this discussion has nothing to do with practicality.

sycoglitch

This is a very common thread and a good one .

Now if people can behave themselves and only post when they have actual insight and not the usual "waste of time, waste of money" bull-nonsense. Then this can be a most helpful thread. Any negative and useless posts will be DELETED by a mod, so people, lets get carbed

4WD4EVER

Just throwin' this out:

http://www.4wdmechanix.com/How-to-Tu...ker-Motor.html

4WD4EVER

And this. There's some worthwhile info and links:

http://www.hotrodders.com/forum/carb...ep-173961.html

NewKindOfClown

Great link! Thanks for posting

4WD4EVER

You're quite welcome NKOC.

andrewmp6

How to pick out the right cfm carb http://www.hotrod.com/how-to/engine/...b-do-you-need/

andrewmp6

The things different between efi and a carb,The carb will have slower throttle response,Cold starting can be harder if the carb isn't kept tuned.fuel economy is going to be less with a carb.If you want to talk off road a carb don't like steep angles it can lean out or run super rich.A carb works best on flat ground or as close as you can to it.As far spark you can run a distributor the stock coil rail won't work with a msd box.But there is aftermarket systems you can use if you want coil packs like http://www.sdsefi.com/

CobraMarty

Do you need to stay smog/OBD legal?

Clifford has done the most with the I6 and carbs and 2 and 4 barrel carbs.
http://www.shop.cliffordperformance....7.htm?page=all

You can get a distributor on ebay for like $60.
http://www.ebay.com/itm/AMC-JEEP-232-258-4-0-4-2-6-CYL-HEI-DISTRIBUTOR-6511-R-/371058611629?hash=item5664d115ad&vxp=mtr
I like the 4 barrel and 390-600 cfm.

Outlaw Star

<br /><br />Correct, the 390cfm is a great choice for the 232/242/258 engines. <br /><br /> Now 4wd has already given you two great links of information. If HEI is not your cup o tea, the Ford Duraspark II (same system on Cj's and Yj's) will be adequate enough. <br />There will be a downside to conversion (if automatic) as the 30-40/AW4 uses sensors from the engine and ECU to modulate shifting. Your choices will be either full manual control or a trans swap such as A TF (torqueflite) unit or a TH (turbohydro) unit. <br /><br /> Now, it seems as if I'm not the only one who has run a carb, so I will sit back and watch the info posted and chime in when corrections are needed.

andrewmp6

The trans is something i didn't think of,Keeping the stock auto would take a stand alone kit for it or might be cheaper to swap to something like a 700r4 and 88-98 chevy np241.

4WD4EVER

Depending on what you ultimately choose to do, you're covered here to. Great company:

http://www.painlessperformance.com/

NewKindOfClown

Like I said, it's just general theory. In my particular application I'm not worried about emissions, fuel economy, or off-camber situations.

A standalone TCU is on the table so I can run an overdrive trans, and my particular interest in a carb for this application is twofold: The classic aspect of it, and the minimal engine wiring.

Great information so far, guys. Thank you ask for participating

andrewmp6

A 700r4 just needs a tv cable to shift so no tcu to run it.

NewKindOfClown

I hate that TV cable. Nothing but problems on every 700R4 I've used in my Camaros. I'd personally prefer to use a standalone and not fiddle with a TV cable