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-   -   Throttle Body to Carburetor Conversion (http://www.jeepforum.com/forum/f12/throttle-body-carburetor-conversion-1266927/)

TexasTrue 09-19-2011 07:57 PM

Throttle Body to Carburetor Conversion
 
Has anyone ever removed the throttle body of a 4.0L YJ and replaced it with a Weber Carb? What spacer did you use? Will the intake manifold from a 4.2L CJ fit?

Here is one option I found. Can't tell if it will fit.
http://www.webercarbsdirect.com/100_550_p/100.550.htm

Someone please help before I set my Jeep on fire!

ja123182 09-19-2011 08:11 PM

huh??????why?????

goldeaglejeep 09-19-2011 08:52 PM

So you wanna travel back in time to the times of carbs?

Tylerzap 09-19-2011 08:56 PM

Ive always hear Carb to FI, not the other way around.

mazyj 09-19-2011 09:03 PM

Quote:

Originally Posted by TexasTrue (Post 12195272)
Has anyone ever removed the throttle body of a 4.0L YJ and replaced it with a Weber Carb?

This is why we cant have nice things... ;)

On a serious note- I cant seem to think of a situation where this would be something anyone would want to do. Can you explain a little more about the situation and what your trying to accomplish or fix so we can help out?

4.7stroker 09-19-2011 09:06 PM

There is no reason you couldn't install a 4.2 intake and slap a carb on it.
I took a 99+ intake and with some modiications and a home brew adaptor I installed a MC2150.
Check out pics in my gallery for the conversion.
To some it seems like a backwards step but for me I need the simplicity it gives me. I do a lot of solo wheeling in the desert and the last thing I need is some sensor or wire failing leaving me with a long walk in the sun.

Dwayne

goldeaglejeep 09-19-2011 09:11 PM

^ that's were I differ call me new school but we used to do 2hrs+ of rally runs and I felt very comfortable with a well tuned MPFI system.

Old4X 09-19-2011 09:33 PM

Your 4.2 or 258 intake will fit fine on the 4.0 head. But, you have to use the 4.o exhaust manifold with the 4.o head.

This is something I would likely do, I much prefer carbs over electronic wiz-bang squirt guns.

imstillatwork 09-19-2011 09:53 PM

weird. I bought a horse to ride into town on the other day...They're mane is softer than a YJ and all they need is hey.

dillonjm 09-19-2011 10:09 PM

As others said, I can't think of one good reason to do this.

I love a good carb'd v8 as do many for their ease of tuning, but the FI 4.0 shouldn't need any tuning. Its a pretty simple system that works very well.

94chb 09-19-2011 10:14 PM

i will give you all my 4.2 carb stuff for all your Fuel injection stuff!!! :D seriously ... i will ... i hate being carb and want to goto fuel injection.

TexasTrue 09-19-2011 11:17 PM

Thanks for all the tips. Looks like I will be searching for a 4.2L intake manifold. For those of you forward thinkers, here is my reasoning:

My original wiring and ECM is fried. I bought the E-Z wiring harness, but, due to my superior electrical knowledge (insert sarcasm) I was unable to make the basic 12 circuit harness work with the computer. I decided instead to put an old style distributor and carburetor on to make her go. Also, I like the simplicity.

TexasTrue 09-19-2011 11:23 PM

Quote:

Originally Posted by 94chb (Post 12195980)
i will give you all my 4.2 carb stuff for all your Fuel injection stuff!!! :D seriously ... i will ... i hate being carb and want to goto fuel injection.

PM me. Seriously. I'll send you my intake manifold and throttle body in exchange for your intake manifold.

mazyj 09-20-2011 01:10 AM

Quote:

Originally Posted by TexasTrue (Post 12196155)
Thanks for all the tips. Looks like I will be searching for a 4.2L intake manifold. For those of you forward thinkers, here is my reasoning:

My original wiring and ECM is fried. I bought the E-Z wiring harness, but, due to my superior electrical knowledge (insert sarcasm) I was unable to make the basic 12 circuit harness work with the computer. I decided instead to put an old style distributor and carburetor on to make her go. Also, I like the simplicity.

I applaud the originality, I would never think to do that :cheers2:

TexasTrue 09-20-2011 02:22 PM

old4x and 4.7stroker: Any suggestions on a replacement fuel pump? I'm hearing that I will need to tone it down to about 3-4 psi.


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