carburating a 4.0 stroker. - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > General Technical Discussions > Engines & Drivetrain > carburating a 4.0 stroker.

Rear Disc Brake Conversion Kit- TJ,YJ,XJSWAG 50 Cal Ammo Can Mount With M2A1 Can~Artec JK 1 TON SWAP~

Reply
Unread 07-28-2013, 09:20 PM   #1
warbed1
Registered User
 
Join Date: Jul 2013
Location: edinburg, TX
Posts: 1
carburating a 4.0 stroker.

Yea I'm a newbe to the Jeep world, but I'm a old fart when it comes to AMC and Rambler. So here is my question. Building a short rod 4.6 and need to keep it basic. Yes I could go fuel injection but I want to keep it carburated, 1980 CJ originally a 4.2 with a heavy cast iron intake and a 24 inch crack down the side of the block. I have the machining equipement.(Bridgeport) can I just machine the 4.0 intake to accept the 2100 series carb. The runners on the non HO intake are very similar to the 4.2 intake. The HO looks like it would flow better but I'm wondering about atomization of the fuel in the 4.0's intake. has anybody done this before. again I No just about all there is about fuel injection and it cant be beet but I want to go carburated. Even if I can't spell the word.

warbed1 is offline   Reply With Quote
Unread 07-28-2013, 11:28 PM   #2
DaemonForce
Registered User
1983  
 
Join Date: Jun 2013
Location: Centralia, WA
Posts: 111
I'm stuck in the same situation for almost completely different reasons. I'm familiar with the Hornet and Rambler and my project is Eagle. I've been using carburetors my whole life and on the I6 series I prefer Carter against the advice of everyone. I am NOT familiar with fuel injection and upon doing so I want to keep my hydraulic transmission and stock electrical harness, which is why I'm stuck using Renix as a crutch. The bad news is that the 4.2L was an intake orphan but that doesn't mean it's not an option for the 4.0L head. The major change with the new head design is that the old 4.2L exhaust is no longer compatible. That seems to be the only important change.

It is far easier work to modify the 4.2L intake to sit proper against the intake ports instead of remachining an injection manifold to have a carburetor mount. Because I'm starting to get lazier than that I'm at the point where I would just suggest a Clifford or Offenhauser intake. It should line up perfectly but there is still work when setting up the intake alignment holes to sit just above the pins. This thread shows the main issues with setting up carbureted intakes on the 4.0 head. Plenty of forums expand on this pretty good but at least this one is clear about it with good pictures.
DaemonForce is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.