Size of 2.5 and 4.0 Throttle Body - 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 > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > Size of 2.5 and 4.0 Throttle Body

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineYear End Clearance Sale! Save 20%NEW!! HMF 50"-52" light bar mounting brackets!!

Reply
Unread 09-16-2012, 10:33 PM   #1
TA-YJ
Registered User
1992 YJ Wrangler 
 
Join Date: Dec 2007
Location: Pennsylvania
Posts: 539
Size of 2.5 and 4.0 Throttle Body

Can someone give me the measurement for the size of the two throttle bodies that mates to the manifold? I picked up a rebuild engine that came with a TB and I wanted to double check if it was a 2.5 or 4.0. Thanks.

__________________
1992 YJ 2.5L
Engine Mods:4.0L TB, Ford Design III 19lb Injectors, Firepower Ignition System, Ford TBird Electric Fan, Pacesetter Header, Magnaflow Cat, Dynomax Super Turbo Exhaust
Suspension Mods:BDS 2" Lift, M.O.R.E. 5/8" HD Shackles, 1" Brown Dog MML
Other:LED Tails and Herculined
TA-YJ is offline   Reply With Quote Quick reply to this message
Unread 09-17-2012, 06:05 AM   #2
Duncan542
Registered User
1995 YJ Wrangler 
 
Join Date: Jun 2012
Location: Petersburg, Illinois
Posts: 176
Not sure on the 2.5 but 4.0 is either 60 mm or 62 mm.
Duncan542 is offline   Reply With Quote Quick reply to this message
Unread 09-17-2012, 09:13 AM   #3
TA-YJ
Registered User
1992 YJ Wrangler 
 
Join Date: Dec 2007
Location: Pennsylvania
Posts: 539
Any way you could take a measurement? I thought the 4.0 was less than that bc the 62mm was an upgrade for it
__________________
1992 YJ 2.5L
Engine Mods:4.0L TB, Ford Design III 19lb Injectors, Firepower Ignition System, Ford TBird Electric Fan, Pacesetter Header, Magnaflow Cat, Dynomax Super Turbo Exhaust
Suspension Mods:BDS 2" Lift, M.O.R.E. 5/8" HD Shackles, 1" Brown Dog MML
Other:LED Tails and Herculined
TA-YJ is offline   Reply With Quote Quick reply to this message
Unread 09-17-2012, 01:14 PM   #4
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 15,707
http://www.jeepforum.com/forum/f12/2...y-swap-602123/

Quote:
Originally Posted by 4bangerYJ View Post
The stock 2.5 TB is 48mm
The stock 4.0 TB is 55mm
The gasket is 62mm.
Que89YJ is offline   Reply With Quote Quick reply to this message
Unread 09-17-2012, 02:10 PM   #5
mrdeath2000
Registered User
1993 YJ Wrangler 
 
Join Date: Jun 2011
Location: Surprise,, AZ
Posts: 652
you can get the 4.0 bored.

get it from someone reputible, if they go to 62mm bore and it's not done right it will whistle. you can push it to 63mm i think, but it's not advised. some only go to 60mm, still plenty big... hell stock 4.0 at 55mm is plenty big unless you start playing with fuel pressures with an adjustible regulator and/or playing with MAP voltages.
__________________
93' YJ 2.5L, 4.88's, 8.8, E-Locker & LSD
mrdeath2000 is offline   Reply With Quote Quick reply to this message
Unread 09-17-2012, 07:56 PM   #6
Duncan542
Registered User
1995 YJ Wrangler 
 
Join Date: Jun 2012
Location: Petersburg, Illinois
Posts: 176
Quote:
Originally Posted by mrdeath2000
you can get the 4.0 bored.

get it from someone reputible, if they go to 62mm bore and it's not done right it will whistle. you can push it to 63mm i think, but it's not advised. some only go to 60mm, still plenty big... hell stock 4.0 at 55mm is plenty big unless you start playing with fuel pressures with an adjustible regulator and/or playing with MAP voltages.
I have heard alot of people have better luck with 60mm rather than 62mm
Duncan542 is offline   Reply With Quote Quick reply to this message
Unread 09-19-2012, 12:24 PM   #7
TA-YJ
Registered User
1992 YJ Wrangler 
 
Join Date: Dec 2007
Location: Pennsylvania
Posts: 539
Thanks for the measurements! Got everything squared away.
__________________
1992 YJ 2.5L
Engine Mods:4.0L TB, Ford Design III 19lb Injectors, Firepower Ignition System, Ford TBird Electric Fan, Pacesetter Header, Magnaflow Cat, Dynomax Super Turbo Exhaust
Suspension Mods:BDS 2" Lift, M.O.R.E. 5/8" HD Shackles, 1" Brown Dog MML
Other:LED Tails and Herculined
TA-YJ is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
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


Suggested Threads





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.