4.2-4.0 intake question - JeepForum.com
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post #1 of 6 Old 08-15-2009, 10:42 PM Thread Starter
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4.2-4.0 intake question

i have a 84 cj with a 4.2 and a mopar efi setup.......what i plan on doing is building a setup to put a eaton m90 supercharger on this motor........i dont want to have alot of down time on the setup.......well i work for a junk yard and have tons of 4.0 intake mani's laying around.....can i use it to build my setup or am i going to have to use a 4.2 intake mani.........i searched and really didnt find anything

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post #2 of 6 Old 08-16-2009, 06:01 AM
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post #3 of 6 Old 08-16-2009, 06:42 AM Thread Starter
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didnt help
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post #4 of 6 Old 08-16-2009, 06:48 AM
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How about http://www.4wheeloffroad.com/techart...kit/index.html

Later, T.J.

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post #5 of 6 Old 08-16-2009, 07:38 AM
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the ports match from 4.2l to 4.0l, the hi port has exactly that though the ports are still spaced right but the pins are in a different place.

if you were to put a high port on a 4.2 you would have to remove the pins.
hesco has some sealent you can you on the intake.

honestly why not a 4.0l head conversion???

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post #6 of 6 Old 08-16-2009, 03:30 PM Thread Starter
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which pins?.....im thinking about a 4.0 head conversion.......have not read up about it too much yet but i thought i saw somewhere it bumps the compression up and i wanna stay away from that with the supercharger on it
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