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Clevite 77
Dodge Dakota
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5/29/2002
01:06:12
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 Subject: Stupid Thought
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Ok, I'm probly not thinking right, it's late.
if the 5.2L = 5.9L
than does the 4.7L = 5.7L?
I was just wondering, does anybody know if the heads off of the 5.7L will bolt up to the 4.7L?
If so, theroredically if the combustion chambers are deeper, you could run more boost, right?
Do you see where I'm going with this? I haven't heard too much about the 5.7L components.
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kota on 20s
GenIII
 
5/29/2002
01:20:55
| RE: Stupid Thought
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from what i remember the 5.7L is not a overhead cam engine, so it would not work. i have HEARD the hemi heads will bolt on to the 5.2/5.9 though.
this is all hearsay i dont clame it to be true, but just what i have heard. maby someone else can shed some light on the subject
Eric, 98 5.2 5speed, K&N gen II, 50mm TB, 2bbl M-1, 1.7RR's, JBA ciramic headers, carsound cat, dumped gibson, and a lot more
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CThomp
Dodge Dakota
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5/29/2002
07:54:16
| RE: Stupid Thought
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The 5.7L is a pushrod engine. The hemi part is what makes it more efficient. It should have a different stlye of pistons than the 5.2 or 5.9 as well to make the hemi part work right. Can't bolt to a 4.7 though. Would have been very cool if the 4.7L had been a hemi instead of almost a hemi. The jerks.
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Clevite 77
Dodge Dakota
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5/29/2002
11:59:59
| RE: Stupid Thought
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really??? I thought they were doing away with the whole push rod deal.
I'm lost
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Big Blue QC
GenIII
5/29/2002
12:25:32
| RE: Stupid Thought
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the 5.7 is a derivative of the 4.7, like the 3.7V6 is the 4.7 with 2 cylinders chopped off. I don't know anything else regarding the 5.7. Good luck.
2002 QC 4x4 Sport Plus, 4.7L, auto, Patriot Blue, Tire & Handling group,
Heavy Duty Service group, Leer cap w/out windows, Mopar Step bars and roof rack, Rhino liner in bed and on step bars, Pace Edwards Power Tailgate lock
3.55 rear, 4-wheel anti-lock brakes, all possible fluids are AMSOIL
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Clevite 77
Dodge Dakota
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5/29/2002
12:36:37
| RE: Stupid Thought
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So are you saying it is an OHC motor
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Chris Smith
Dodge Dakota
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5/29/2002
13:17:50
|  RE: Stupid Thought
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Go here
http://www.allpar.com/mopar/new-mopar-hemi.html
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Clevite 77
Dodge Dakota
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5/29/2002
13:40:02
| RE: Stupid Thought
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Thanks for clearning that up everyone
man I still don't understand why they went to pushrods???
Hey I don't care I was just hoping I could barrow some 5.7L sh!t for my 4.7L I wonder if the crank will work???
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Demon-Xanth
Dodge Dakota
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5/29/2002
16:37:46
| RE: Stupid Thought
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OHC engines tend to have a longer crank-top of valve cover distance. A pushrod configuration allows for a much longer stroke, and as a side effect a shorter timing chain.
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Dave
Dodge Dakota
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5/29/2002
22:25:28
| RE: Stupid Thought
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The hemi has a hemispherical combustion chamber with thespark plug right smack in the top of it.
This would require a DOHC setup with the cams on either side of the plugs, I would think.
Neat idea.... and four valves per cylinder? Hmmmmmmm....
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Clevite 77
Dodge Dakota
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5/29/2002
23:02:17
| RE: Stupid Thought
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hey Dave,
the 426 Big blog was a hemi and it was a pushrod motor. the new 5.7L hemi is a 16 valve motor (2 per cyl)
I still can't get over that they didn't go with a modular motor. I figured that the 5.7L would follow the 3.7L, and the 4.7L..oh well
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SuperBee
Dodge Dakota
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5/30/2002
01:07:31
| RE: Stupid Thought
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i had heard it has 2 spark plugs per cylnder
true or false?
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Clevite 77
Dodge Dakota
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5/30/2002
01:18:10
| RE: Stupid Thought
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that's what I heard to
car-truck.com is a good site for stuff like this
if you do a search on the 5.7L hemi over there it'll tell ya everything, they know. The best part about their search is it doesn't leave you in limbo
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92dakotahd
GenII
5/30/2002
02:51:18
|  RE: Stupid Thought
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Hey Big Blue QC,
I'm no expert but the 3.7 and 4.7 can't be related the same way the 3.9 and 5.2 are. The math just doesn't add up. 3.7/6=.616... which would equal the dis of each cylinder which if multiplied times 8 is 4.933... so they can't be related. It's not as nice as 3.9/3=1.3x8=5.2 Unless the liters are really stretched.
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Magnum Opus
Dodge Dakota
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5/30/2002
16:06:12
| RE: Stupid Thought
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There is a good writeup on the new Hemi in Mopar Action this month.
The valves are pushrod actuated with 2 per cylnder and two sparkplugs per cylnder. The plugs are in the voids on either side of the valves. The block is similar to the 5.2 5.9 but the heads have different head bolt configuration.
O:O <- valve-plugs-valve
Richard Ehrenberg from Mopar Action really knows his stuff really informative article.
That's all I can remember from the article.
peace.
Middy.
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