Punching out throttle body
Its been recommended to me to bore out the throttle body on 98 4.0. Has anybody modified theirs? If so how big, did you get mpg gain, power gain? Any downsides to doing it?
Originally Posted by beau View Post
I'll be able to comment more specifically in a few days when I get my freshly bored TB back in the mail
2003 WJ in Jeep Green Metallic, 4.0/242/4.10's. 4" Teraflex springs w/ RE monotube shocks and IRO short arms, cheap intake w/ amsoil filter, 2.5" hi flow cat and back exhaust, lots of lights and other misc crap.
Check out my build thread here:
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Belief In All Things Jeep
I just removed my Fastman 52mm TB. Back to stock for me. But yea pianoman is right, you'll get better throttle response all around and more HP at WOT, but it's at a cost. When you're only getting 12.5 mpg to start with, that cost is hard to live with.
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