Decking the 4.0?
11-13-2008, 09:57 AM
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Location: Indiana
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Year: 1987
Model: Cherokee
Engine: 4.0
Decking the 4.0?
Anyone decked the head on a 4.0? What's safe? Wanting to take the compression up to about 9.5:1 without new pistons, crank, etc... Looking for a little more torque and gas mileage.
11-13-2008, 10:19 AM
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Location: In yourz postez fissin jurr spelinzs
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Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
Most I have ever taken off was 20 thousanths. I am sure it will go more but don't know the limit.
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