4.0 head on a 258, can I keep the carb? - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 10-24-2002, 06:54 PM Thread Starter
 
Join Date: Oct 2001
Posts: 110
Thanks: 0
Thanked 0 Times in 0 Posts
 
4.0 head on a 258, can I keep the carb?

Some of you guys may think I'm backward, but I like carbs, mainly for simplicity of the fuel system. I want to put the better flowing 4.0 head on my '81 258, but want to know if there is an intake that will bolt to the 4.0 head & accept a carb? The carb I have is a Holley 390 four barrel.
kansasjeeper is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 10-24-2002, 07:32 PM
 
Join Date: Sep 1999
Posts: 2,137
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: 4.0 head on a 258, can I keep the carb?

You can use your stock intake.
You just have to be careful as you practically have to hand align it to make sure you get a good seal. Suggest you use a VERY thin smear of Permatex Ultra Coppper as a sealant.
If it were me, I'd get a 4.0 intake gasket and use it to do a little match porting to smooth out the transition air flow.
You'd still probably need to use a 4.2 intake gasket on assembly, trimmed to match the porting if that was done.
Jaffer is offline  
post #3 of (permalink) Old 10-25-2002, 01:57 PM
Can't Get Enough
 
Tippy's Avatar
 
Join Date: Feb 2001
Location: Alliance, Ne
Posts: 1,423
Thanks: 1
Thanked 0 Times in 0 Posts
 
Re: 4.0 head on a 258, can I keep the carb?

Watch your years however. If you want to keep the carb manifold stick to the '91-95's for your head. I used a '98 head and the carb intake would not line up correctly (or at least my '80 intake). I decided to go all the way with the FI so it worked out great for me. Good performace upgrade.
Tippy is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome