4bangerjp.com

General Forums => The Mess Hall => Topic started by: yelpu1 on March 16, 2008, 06:59:10 AM

Title: Throttle body upgrade ?????????????
Post by: yelpu1 on March 16, 2008, 06:59:10 AM

I found a 4.0 bored throttle body on E-bay ( bored to 63mm) !  I was wondering if this is too much for my 2.5 without changin the fuel pressure regulator ?????   Thanks in advance for your replys !

Title: Re: Throttle body upgrade ?????????????
Post by: jcsanders79 on March 16, 2008, 08:13:21 AM

I believe mine is bored to 62mm.

Title: Re: Throttle body upgrade ?????????????
Post by: jfrabat on March 16, 2008, 10:38:22 AM

The intake on wranglers (both 4.0 and 2.5L) is 62mm; I've never seen a 63mm bored TB, but that extra mm would not help at all IMO...

Title: Re: Throttle body upgrade ?????????????
Post by: 95yjman on March 16, 2008, 12:56:58 PM

Maybe somebody messed up and bored an extra inch  :confused:

Title: Re: Throttle body upgrade ?????????????
Post by: jfrabat on March 16, 2008, 01:20:04 PM

Quote from: 95yjman on March 16, 2008, 12:56:58 PM

Maybe somebody messed up and bored an extra inch  :confused:

Dont you mean extra milimeter?

Title: Re: Throttle body upgrade ?????????????
Post by: 95yjman on March 17, 2008, 06:19:11 AM

Quote from: jfrabat on March 16, 2008, 01:20:04 PM

Dont you mean extra milimeter?

oops..yep heh

Title: Re: Throttle body upgrade ?????????????
Post by: Bounty Hunter on March 17, 2008, 05:47:00 PM

The throttle body opening on the manifold is 62mm on a 4.0L, much smaller on the 2.5L.  The 2.5L manifold needs opened up to get the benefit of an oversized TB.

I sell 62mm TB's for cheaper than most on Ebay, unless it's from trl-rde on Ebay as that is me.  I've got spacers too.

You don't need an adj. fuel pressure regulator to run one, although it may help to have one.  I run a 62mm TB, spacer, and performance cam.  I plan on installing an air/fuel guage and adj. fuel pressure regulator so I can dial in the A/F ratio.  Likely an adj. MAP sensor as well.