motor question
08-11-2010, 10:57 AM
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Model: Cherokee
motor question
Ok I have a 86 xj with 35s my trail rig and I want to get a little more out of the 4.0. I heard you can put the 4.2 heads and cam in for a little extra only reason I am think about it is cause motor it do for a rebuild this winter. Anyone have any other ideas and info if the head swap would work that would help or what should I do not looking for gobs of power.
08-11-2010, 11:01 AM
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Year: 1997
Model: Cherokee
Engine: 4.0, comp cam, 99 intake, apn header, neon injectors, Thunderbolt 2.5" High Flow Cat
I dunno about the 4.2 heads... but what people are doing is taking a 4.2 crank and rods, and some .30 over pistons and making a 4.6 stroker. (little time at the machine shop required obviously, along with a few other things like upgraded injectors and big bore throttle body).
08-11-2010, 11:07 AM
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Year: 1995
Model: Cherokee
Engine: 4.0 I6
I dunno about the 4.2 heads... but what people are doing is taking a 4.2 crank and rods, and some .30 over pistons and making a 4.6 stroker. (little time at the machine shop required obviously, along with a few other things like upgraded injectors and big bore throttle body).
I run 35s on my sport and the 4.0 isnt doing it for me, so Im gonna ladder the frame and custom reinforce it. Chevy 350.
08-11-2010, 11:40 AM
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Year: 1993, 1994
Model: Cherokee
Engine: 4.0L HO
Ok I have a 86 xj with 35s my trail rig and I want to get a little more out of the 4.0. I heard you can put the 4.2 heads and cam in for a little extra only reason I am think about it is cause motor it do for a rebuild this winter. Anyone have any other ideas and info if the head swap would work that would help or what should I do not looking for gobs of power.
08-11-2010, 04:06 PM
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Model: Cherokee
I dunno about the 4.2 heads... but what people are doing is taking a 4.2 crank and rods, and some .30 over pistons and making a 4.6 stroker. (little time at the machine shop required obviously, along with a few other things like upgraded injectors and big bore throttle body).
thank for the help
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