difference between 4.0 and 4.0HO
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Newbie
Joined: Dec 2010
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Model: Cherokee
difference between 4.0 and 4.0HO
Im about to buy a stroker kit for my xj 4.0 but its not the HO. i want to know what the difference between the 2 is and if i would be wasting my money putting it on the non HO. any help would be appricated
CF Veteran
Joined: Sep 2010
Posts: 21,168
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From: Milwaukee, WI
Year: 1987
Engine: Check
Other than year it was produced, not all that much. Bit more power.
CF Veteran
Joined: Jun 2011
Posts: 2,858
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From: Nor-Cal
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
First of. All let me say that my non h.o. jeep with stock gears on 33s is faster then every h.o. jeep I've come across..... with a little tuning an intake and an exhaust. Next the h.o. and renix have a different head. The ports flow a little better on the h.o. from thee the intake and throttle body are different aqnd I've heard of people with renix engines using bored throttle bodies making as much power as an h.o. with their stock head... also the sensors are different. The renix system uses a different computer. I'm biased but after having the renix with its loose computer parameters and simple tuneability I wouldn't want an h.o. that said it takes a little work to makr an h.o. work with renix injection ent vice versa.
Junior Member
Joined: Jun 2011
Posts: 37
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From: Rogers,MN
Year: 96
Model: Cherokee
Engine: 4.0
First of. All let me say that my non h.o. jeep with stock gears on 33s is faster then every h.o. jeep I've come across..... with a little tuning an intake and an exhaust. Next the h.o. and renix have a different head. The ports flow a little better on the h.o. from thee the intake and throttle body are different aqnd I've heard of people with renix engines using bored throttle bodies making as much power as an h.o. with their stock head... also the sensors are different. The renix system uses a different computer. I'm biased but after having the renix with its loose computer parameters and simple tuneability I wouldn't want an h.o. that said it takes a little work to makr an h.o. work with renix injection ent vice versa.
CF Veteran
Joined: Jun 2011
Posts: 2,858
Likes: 1
From: Nor-Cal
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
I'm a sucker for a civic with a coffee can hangin out the back... I also drive a 66 mustang gt with a 4 barrel lol. Anyhow porting a head(long as you don't go overboard and you keep good port velocity) a bigger throttle body and intake and a freer flowing exhaust will increase your.mileage if you can keep your foot off the gas... second part is a problem for me....
CF Veteran
Joined: Sep 2010
Posts: 21,168
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From: Milwaukee, WI
Year: 1987
Engine: Check
Seasoned Member
Joined: Sep 2009
Posts: 273
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From: Coventry, CT
Year: 2000
Model: Cherokee
Engine: 4.0 high output, Alabama Cylinder head, 60mm bored TB
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CF Veteran
Joined: Sep 2010
Posts: 21,168
Likes: 5
From: Milwaukee, WI
Year: 1987
Engine: Check
CF Veteran
Joined: Mar 2009
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From: Visalia, Kalifornia, ussa
Year: 1996
Model: Cherokee
Engine: 4.0
You have a 4.0 HO. Jeep stopped using the badges in the late 90's. HO was introduced in early 90's and was used in all 4.0 Jeeps till the 4.0 was dicontinued. You can stroke a 4.0 HO, same as with non HO.
CF Veteran
Joined: Sep 2010
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From: Milwaukee, WI
Year: 1987
Engine: Check
CF Veteran
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From: Dayton, Ohio
Year: 1992
Model: Comanche
Engine: 4.0
CF Veteran
Joined: Sep 2010
Posts: 21,168
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From: Milwaukee, WI
Year: 1987
Engine: Check