4.0 liter Engine - JeepForum.com

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post #1 of 2 Old 06-26-2005, 10:37 AM Thread Starter
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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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post #2 of 2 Old 06-26-2005, 03:28 PM
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1986 CJ7 
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Location: Monroe
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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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