Re: Hey 2.5L crowd: more performance mods(longish)

From: dwmagnum (dwmagnum@interlynx.net)
Date: Fri Jan 18 2002 - 04:10:43 EST


COOL SWAP! DW

Ragnarok wrote:
>
> For the few of us who have the gen III 2.5, I've made a few
> discoveries. If you already know these things, please ignore this post.
> ;)
> As we all know, this is a jeep motor. What I discovered is that the
> Jeep 4.0L throttle body uses the same bolt pattern as the 2.5L, and in
> fact is exactly the same in every dimension except throat size, which is
> considerably bigger. So I got one from a 95 Jeep Wrangler 4.0 off of
> www.car-part.com for $42 shipped! You have to switch over the TPS and
> the MAP sensor, as the plugs will be different, but you can leave the
> idle air adjustment motor alone, even though it sez 4.0. It won't make a
> difference. It takes 20 minutes to clean it and bolt it on, and bingo! A
> noticeable difference above 2500 rpm, pulls all the way to the redline,
> for $42! Woohoo! Here's the head-scratcher: the port in the intake
> manifold is larger then the 2.5L throttle body, and matches the 4.0L
> throttle body exactly. It's like it was made for it. Go figure.
> www.turbocity.com has Jeep 2.5L performance parts, including ported
> TBs for the 2.5 and the 4.0, both for $200 plus $200 core. Although why
> you'd pay $200 for a ported 2.5 TB is beyond me, when you can do what I
> just did, above. Heh. Unless you want to put a ported 4.0 on your 2.5?
> Also at Turbocity is an excellent air intake tube. It replaces the
> entire intake muffler/s-shaped tube contraption with just one tube just
> long enough to reach over the engine. Once again, a noticeable
> difference. $75 plus a cone air filter, got mine off Ebay for $20.
> Beautiful. Once again, a 15 minute install.
> The next step is to borrow a friend's Gtech and make a few runs, see
> how much difference shows up in the numbers.
> Next: Pacesetter makes a header for the 97 Jeep Wrangler 2.5L for
> $137. Gonna pick one up and see if it works out.....
>
> William
> '97 reguler cab shortbed 2.5L 5-spd 2wd Dakota From Hell.

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