also: are those throttle body spacers really any good? or can i just bore a piece of aluminum from the throttle body gasket as a template and get the same results? and is thicker better? too thick and i'd have a problem with hood clearance tho.
Not exactly sure what you're talking about. I don't know of any I6 (it's an I, as in inline, is it not? Some fonts use a lowercase L as a capital i, which is where confusion comes in.) H.O. units. There is a HO 4.7L v8 in the new WJs, and Ford made HO 4.9L v8's for years in the Mustang 5.0. Your 4.0L puts out 190hp/235ft-lbs, the current 4.0 puts out 195hp/230ft-lbs, so I'm again not sure what you want.
The V6 thing was because you asked about a H.O. 4.0L
Ok here's the poop.
'90 and older 4.0L XJs put out 177 hp and 224 lb-ft torque.
In '91 it got bumped via minor tweaking (lower compression for one) up to 190hp/235lb-ft
For 2001, the torque was dropped down to 225lb-ft, to make the Liberty look better on paper.
ZJs from '93 to '95 had 190/235, then it dropped to 185/220 between '96 and '98, and up to 195/230 from '99 on up.
Since you've got the '94, you've got 5hp less than current, but 5 lb-ft more. Now. What do you want to do about it?
I really don't know what the fuss is about. These #s were gathered from carpoint.msn.com and I do not guarantee their accuracy.
All of the 91 and newer 4.0 L were high output. If you look at the 91 Wrangler stickers they say 4.0 H.O. beacuse they have a much higher flow head design, as compared to the old 4.2. There is no v6 jeep engine besides the old buick engines that were used in a hand full of CJs. There are some cherokees that had a EFI 4.0 that wasn't high output, but the ones with the new head design are HO whether they say it or not.