4.0 HO? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > 4.0 HO?

Stainless Steel Door Hinge PinsPoly Door Hinge BushingsFS: 2007-2013 Jeep Wrangler "HALO" Angel Eye Kit

Reply
Unread 12-01-2001, 01:50 PM   #1
redneckwithajeep
Registered User
 
Join Date: Sep 2001
Location: Colton, Ca
Posts: 39
4.0 HO?

how would i go about making my zj 4.0 a HO engine? whats the difference? any help appreciated!

__________________
'86 xj, 2.8, 3" lift

'94 zj, 4.0, stock (Sadly)
redneckwithajeep is offline   Reply With Quote
Unread 12-01-2001, 01:55 PM   #2
redneckwithajeep
Registered User
 
Join Date: Sep 2001
Location: Colton, Ca
Posts: 39
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.
__________________
'86 xj, 2.8, 3" lift

'94 zj, 4.0, stock (Sadly)
redneckwithajeep is offline   Reply With Quote
Unread 12-02-2001, 12:57 PM   #3
Kess
Registered User
 
Join Date: May 2001
Location: Allegan, MI
Posts: 158
the 4L HO, is a v6 setup, the only way to make ur zj a HO you would have to swap engines with a V6 ho from ur basic L6, go here for the throttle body spacer,poweraide, http://www.truckperformance.com/prod...der=&sf1=JEEP& sf2=1994&sf3=GRAND+CHEROKEE&sf4=4.0L
poweraide TBS

i think thicker is better to an extent, then clearence comes in and im guessing that if you get to greedy that the hightened TB will start to lack power
__________________
In comission:2004 WJ, stock....

Retired:1994 JGC Laredo I6 4.0L, Smittybilt Outland brush guard, 1 3/4" Daystar coil spacers, custom air intake with tube K&N, Borla cat-back, KC Daylighters 6" 150w stainless steel, Xenon superwhite headlights 85/100w, 235/75/15 Pirelli Scorpian A/T, billit aluminum grill inserts
Kess is offline   Reply With Quote
Unread 12-03-2001, 02:50 AM   #4
horatio102
Web Wheeler
 
Join Date: Mar 2001
Location: bjjkb
Posts: 1,451
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.
horatio102 is offline   Reply With Quote
Unread 12-03-2001, 03:05 PM   #5
redneckwithajeep
Registered User
 
Join Date: Sep 2001
Location: Colton, Ca
Posts: 39
obviously u guys know alot more about this than i do, but i know the 4.0 HO is an inline 6. my friend a while ago had a xj w/a 4.0 ho, and it was inline six, also ive worked on cars with them.
__________________
'86 xj, 2.8, 3" lift

'94 zj, 4.0, stock (Sadly)
redneckwithajeep is offline   Reply With Quote
Unread 12-04-2001, 12:28 AM   #6
horatio102
Web Wheeler
 
Join Date: Mar 2001
Location: bjjkb
Posts: 1,451
Oh. I think I know what you're talking about.

The old 4.2L 6 was called High Power or something, because it had low horsepower but loads of torque. Then the new High Output (fuel injected) 4.0L came out.
horatio102 is offline   Reply With Quote
Unread 12-07-2001, 01:30 PM   #7
Fierce ZJ
Registered User
 
Join Date: May 2001
Location: parts unknown
Posts: 14
What was that V6 thing all about??? Your 4.0 is a high output 4.0. So you don't have to do anything to make it a HO.
Fierce ZJ is offline   Reply With Quote
Unread 12-07-2001, 03:07 PM   #8
horatio102
Web Wheeler
 
Join Date: Mar 2001
Location: bjjkb
Posts: 1,451
Quote:
Originally posted by Fierce ZJ:
What was that V6 thing all about??? Your 4.0 is a high output 4.0. So you don't have to do anything to make it a HO.
I think he's talking about the Ford Ranger/Exploder V6.
horatio102 is offline   Reply With Quote
Unread 12-08-2001, 08:34 AM   #9
redneckwithajeep
Registered User
 
Join Date: Sep 2001
Location: Colton, Ca
Posts: 39
i dont know what the v6 thing was about, i have an 86 xj w/a 2.8 V6 but im talking about the 4.0. also, unless they put the 4.0 High Output in the zj's, {stock} i dont have one.
__________________
'86 xj, 2.8, 3" lift

'94 zj, 4.0, stock (Sadly)
redneckwithajeep is offline   Reply With Quote
Unread 12-08-2001, 02:50 PM   #10
horatio102
Web Wheeler
 
Join Date: Mar 2001
Location: bjjkb
Posts: 1,451
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.
horatio102 is offline   Reply With Quote
Unread 12-08-2001, 09:18 PM   #11
Neil
Registered User
 
Join Date: Jul 2001
Location: NorCal
Posts: 46
All ZJ 4.0's were HO. The older Cherokee 4.0 was not considered an HO. Not sure but I think the HO started in 91- or 92
__________________
5.9 ZJ
98 ZJ 5.2
Neil is offline   Reply With Quote
Unread 12-08-2001, 10:19 PM   #12
redneckwithajeep
Registered User
 
Join Date: Sep 2001
Location: Colton, Ca
Posts: 39
horatio & neil, that really helped, thanx
__________________
'86 xj, 2.8, 3" lift

'94 zj, 4.0, stock (Sadly)
redneckwithajeep is offline   Reply With Quote
Unread 12-09-2001, 01:19 PM   #13
Brendan
Registered User
 
Join Date: Sep 2001
Location: FL
Posts: 162
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.
__________________
Duvie

95 YJ 2.5L 5 Speed

Fightin a war against Florida Rust!
Brendan is offline   Reply With Quote
Unread 12-09-2001, 04:52 PM   #14
redneckwithajeep
Registered User
 
Join Date: Sep 2001
Location: Colton, Ca
Posts: 39
that helped, but i think you're slightly mestaken. the buick engine was put into the cherokees but nobody wanted them because of their lack of power. i know this because i have one.
__________________
'86 xj, 2.8, 3" lift

'94 zj, 4.0, stock (Sadly)
redneckwithajeep is offline   Reply With Quote
Unread 12-19-2001, 08:34 PM   #15
The^Knightmare
Registered User
 
Join Date: Dec 2001
Location: Florida
Posts: 20
heres a simple question....does the inline 6 that I have in my 94 Grand Cherokee laredo have enought power or should I get a bigger ( or add more performance options ) engine
__________________
94 JGC Laredo sorta stock
- K&N Custom Air Intake
- 20x8.5 Enkei AKAs
- 3JL 12W6s w/ Kicker ZR600
The^Knightmare is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.