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Unread 05-15-2011, 02:43 AM   #16
Poncherello
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2010 KK Liberty 
 
Join Date: Apr 2011
Location: Paterson, New Jersey
Posts: 1,009
Plastic intakes(upper plenums) have been used by many starting as early as '96(GM).Plus it's cheaper,by alot,and easier to make then a alloy plenum.

I agree here that plastic is much cheaper to produce then alloy, and I read too that inner channels are much smoother hence giving you better flow. But to me it's just cheap, but if you shoudl need to replace it, they will still charge you and arm and leg for it lol.

On another note, again just kind of dreaming, I think having an addtional option of the 3.0 CRD and a 4.7 Liter V8 with cylinder deactivation would be great optional engines for the Liberty matched with a 5-6 speed auto or man trans and some factory lockers.

Moreover, I am happy with what I got, and only have 38 more payments left to go :]

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Unread 05-15-2011, 03:27 AM   #17
mike_breaker_5
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just poking my nose in here, i have been reading on the new pentastar recently and looking at the numbers it has more factory torque and hp than the 5.2 i just finished swapping into my yj.
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Unread 05-15-2011, 06:49 AM   #18
tjkj2002
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Quote:
Originally Posted by Poncherello View Post
but if you shoudl need to replace it, they will still charge you and arm and leg for it lol.
The upper plastic plenum for the 3.7 is like $85.
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Unread 05-15-2011, 07:26 AM   #19
mike_breaker_5
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i kind of like the newer composite intakes. they have a reusable gasket on them, light, way cheaper than aluminum, and are still pretty durable. when's the last time you had an impact to the intake manifold that you were thinking "man, i better go check and see if that cracked my intake manifold"? i have however seen some poorly designed ones (cough cough ford), but they seem win win to me. you lose weight turbulence over castings through lighter materials and smoother plenum walls.
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Ratmonkey donation page. all proceeds will go to his family.
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it's not much to look at... but it's mine.
5.2lswap, metalcloaks, bedliner, tucked belly, d60's, soon to be nv4500 and d300.
http://www.jeepforum.com/forum/f22/m...r-junk-990191/
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