4.0 tb on a 2.5? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 05-06-2012, 09:19 AM   #1
Jeeper
 
pendletontn's Avatar
 
Join Date: Dec 2011
Location: Estill Springs TN
Posts: 152
4.0 tb on a 2.5?

I have read that a 4.0 tb will fit on a 2.5? If so is there a big difference in power? Is there very much modification involved? I have a totally rebuilt 2.5 in my 89 yj that is .30 over and she has a lot more power than before just trying to get all I can out of my 4 little hamsters!!!

pendletontn is offline   Quote Quick Reply
Old 05-06-2012, 09:22 AM   #2
Sponsoring Vendor
 
Ibuildembig's Avatar
 
Join Date: Aug 2010
Location: Fruitland, Missouri
Posts: 8,259
Your 89 should be TBI not sequential fire

Ibuildembig is offline   Quote Quick Reply
Old 05-06-2012, 09:31 AM   #3
Jeeper
 
Join Date: Oct 2011
Location: NoVA
Posts: 444
Has anyone posted up any dyno charts with the new tb vs the old?
P0234 is offline   Quote Quick Reply
Old 05-06-2012, 09:34 AM   #4
Jeeper
 
Xpress's Avatar
 
Join Date: Jan 2011
Location: El Cajon
Posts: 2,566
^Yes, the increase in HP is generally minute, it takes a whole slew of parts to really wake the engine up.

Like mentioned, you have a TBI model, the 4.0 engines were MPFI, so it won't work unless you can somehow figure out how to wire your 89 sensors to it, as well as mount the injector inside of the 4.0 throttle body...
__________________


2.5L Genius of some sort.
Xpress is offline   Quote Quick Reply
Old 05-06-2012, 09:46 AM   #5
Jeeper
 
Join Date: Oct 2011
Location: NoVA
Posts: 444
Quote:
Originally Posted by Xpress View Post
^Yes, the increase in HP is generally minute, it takes a whole slew of parts to really wake the engine up.
That's what I figured. Its likely a more responsive throttle because of the larger opening.
P0234 is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may 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 Off
Pingbacks are Off
Refbacks are Off




» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 06:11 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC