2.5 Bored-out Throttle Body Question

[Tug-n-pull]

1054976

Is there a good bored out throttle Body made for the little 2.5 engin that could? Has anyone used one and was it worth the effort? Tug[addsig]

 

[RayOvac]

1055000

I know that if you have the MPFI 2.5L engine you can use a throttle body from a 4.0...its a direct bolt in replacement for the 2.5 TB and is bigger. Bigger TB = engine gets more air = more HP (yay!) Unforunantly I think that your 2.5 is TBI which uses a different TB. I think the MPFI 2.5 came in in 1991. [addsig]

 

[Jokera]

1055008

RayOvac is correct, the YJ throttle body swap from 2.5L to 4.0L only works on '91-'95 models (MPI = multi port injection). Also, this swap can be done to a TJ, but the throttle body most be the newer type. On the TJs throttle body, the MAP sensor is on the throttle body, the YJ throttle body does not have this sensor.[addsig]

 

[Bounty__Hunter]

1055038

Ya, what Joker said :-D

Tug, have you checked out 4Bangers United forums, it's a ton of 4banger tips and tricks, covers the 4.0L TB swap quite a bit.

I have the 4.0L TB and TBS on my 2.5L, and love it. Every little bit helps on this half-engine :lol: [addsig]

 

[Snitty]

1055125

from everything i've heard... it doesn't do much... but there will be enough to notice. but like bounty said... on a small motor, anything is good[addsig]

 

[Kevin Ayres]

Re: 1055038

hi I AM NEW TO THIS SITE MY SON BOUGHT A 92 WRANGLER 2.5 AND HE IS WANTING TO DO THE 4.0 SWAP AND THE 19LB INJECTORS.WHAT YEAR OF JEEPS DOES HE FIND THE 4.0 THROTTLE BODY.AND DOES THE INTAKE MANIFOLD NEED TO BE BORED OUT.THANKS FOR ANY HELP.

 

[JPNinPA]

hi I AM NEW TO THIS SITE MY SON BOUGHT A 92 WRANGLER 2.5 AND HE IS WANTING TO DO THE 4.0 SWAP AND THE 19LB INJECTORS.WHAT YEAR OF JEEPS DOES HE FIND THE 4.0 THROTTLE BODY.AND DOES THE INTAKE MANIFOLD NEED TO BE BORED OUT.THANKS FOR ANY HELP.

This is a rather old thread . You could have started a new one.



If your doing a 4.0 swap get an engine from an 03-06 including the intake and exhaust manifold.


PS Your caps lock is on and it looks like your shouting at us.

 

[superj]

The throttle body can be from any 4.0 litre jeep that is not a 90 and earlier Cherokee. The early Cherokee used a different fuel injection set up then the newer 4.0 jeep wranglers and later Cherokee, grand Cherokee, Comanche.

Also, see if Jeff Leigh of Leigh machining makes anything for you. He started with a 2.5 jeep and did tons of stuff

 

[superj]

I believe his site is called stroked jeeps

Leigh Performance Machine

I bought a throttle body for a 4.0 from him and it was night and day difference on my cherokee