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Unread 06-26-2005, 11:37 AM   #1
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1997 XJ Cherokee 
Join Date: Jun 2005
Location: charleston, south carolina
Posts: 604
4.0 liter Engine

What is the difference between the regular I6 4.0 liter engine and the 4.0 liter HO engine?

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Unread 06-26-2005, 04:28 PM   #2
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1986 CJ7 
Join Date: Jun 2004
Location: Monroe, WA
Posts: 1,595
Most obvious is the port design on the head. Better flow = more HP.
1986 CJ7, 4.2 w/4.0 head, TFI-HEI hybrid ignition, Clifford manifold w/Holley 390 w/cold air intake, OBA, 4.5" lift, Woody CV shaft and Tattons in front, 4.10 gears - lunchbox in front, Truetrac in the back, twin-sticked, blower upgrade for running topless, trying to keep it simple.

It's just a Jeep, and if you don't wheel it once in a while, it's not even that.
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