Actually it means half of a circle (Hemi = semi and sphere is a ball),
The dome at the top of the cylinder is actually a dome shape (like half
of a softball) in the 426 and 528 Hemis.
Richard in San Antonio
On Mon, 14 Feb 2000 05:03:55 -0800 "Barret, Matt"
<MATT_BARRET@earthtech.com> writes:
> Hemispherical means circular, the 4.7L cylinder head combustion
> chambers are
> not completely circular or Hemi shaped but they are very close! And,
> the
> valves are across from each other instead of beside each other like
> in the
> 318/360. Furthermore, the sparkplugs go in from the top of the head
> instead
> of the bottom side. These are all characteristics of the original
> Chrysler
> Hemi engines of the 50', 60's, and 70's. This is as close to a true
> Hemi
> engine as you can get, without being one!
>
> ___________________________
> Matt -- Mechanicsville, VA
> `00 Sport Plus 4.7L 5spd. 9 1/4 3.92 LSD RC 2x4
> Homemade K&N open element, Traction Bars,
> Spring clamps, ... BEST 1/4 14.871 @ 91.01 MPH
> ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>
> >>>>>>>>>>>>>>>>>>>>
> <<<<<<<<-----Original Message-----
> From: Chris Lambert [mailto:clam9892@postoffice.uri.edu]
> Sent: Thursday, February 10, 2000 10:09 PM
> To: dakota-truck@buffnet.net
> Subject: DML: New 4.7L V8 = new hemi engine???
>
>
> The 4.7 is a semi-hemi head engine. the heads have a hemispherical
> combustion chamber with one side being flat. this is why they are
> only a
> semi-hemi and not a true hemi. the 318 has a conventional combustion
> chamber. Does this make sense to you? I'm sure someone can better
> explain
> if not...
>
> Chris
> (proud faterh of a 00cc, 4.7, 5sp)
>
> >
> >I keep hearing everyone refer to these new hemi engines and then
> refering
> to
> >the 4.7Lv8 D/C is now putting in the Dakotas. So are these new
> 4.7's hemi
> >engines or not? What type of engine is the 4.7 and how is it
> different from
>
> >the 318??
> >- -Tom-
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