4.0 or 4.0HO

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Feb 4, 2012 | 02:11 AM

ryan10584

Thread Starter

Junior Member

Joined: Jul 2011

Posts: 33

Likes: 0

From: fairfield ohio

Year: 93

Model: Cherokee

Engine: 4.0 il6cyl

4.0 or 4.0HO

how can you tell the difference between a 4.0 xj motor and a 4.0HO xj motor? also what is different between the two?

Feb 4, 2012 | 02:29 AM

freegdr

CF Veteran

Joined: Mar 2010

Posts: 47,923

Likes: 38

From: Broward County Fl.

Year: 1989 xj sport 2dr

Model: Cherokee

Engine: 12 hole bosch Injectors

thers renix 4.0 and 4.0 easy way to tell renix has a three bolt mounting surface throttle body the other has four

Feb 4, 2012 | 06:18 AM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,579

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

HO had a freer flowing exhaust manifold, a larger throttle body, same cam through 95 or so, different head intake port design.

To sum it up, it was a huge and successful marketing ploy by Chrysler and the legend lives on today. The HO put out 8 HP more than a Renix and the same amount of torque. All the HP was at a higher RPM.

Last edited by cruiser54; Feb 4, 2012 at 03:44 PM.